Differenze tra le versioni di "Convertire i formati audio mediante il Componente gb.media"

Da Gambas-it.org - Wikipedia.
 
(31 versioni intermedie di uno stesso utente non sono mostrate)
Riga 11: Riga 11:
 
  Public Sub Main()
 
  Public Sub Main()
 
   
 
   
−
   Dim fileaudio, appoggio As String
+
   Dim fileaudio As String
 
   Dim pl As MediaPipeline
 
   Dim pl As MediaPipeline
 
   Dim src, wprs, cnv, lam, snk As MediaControl
 
   Dim src, wprs, cnv, lam, snk As MediaControl
 
   
 
   
−
   fileaudio = "<FONT Color=gray>''/percorso/del/file.wav''</font>"
+
   fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.wav''</font>"
−
 
−
  appoggio = Temp
 
 
   
 
   
 
   pl = New MediaPipeline As "PLine"
 
   pl = New MediaPipeline As "PLine"
Riga 31: Riga 29:
 
   lam["bitrate"] = 192      <FONT Color=gray>' ''Imposta il valore del Bitrate "Costante".''</font>
 
   lam["bitrate"] = 192      <FONT Color=gray>' ''Imposta il valore del Bitrate "Costante".''</font>
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
−
   snk["location"] = appoggio
+
   snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"
 
    
 
    
 
  <FONT Color=gray>' ''Collega fra loro all'interno della pipeline gli oggetti MediaControl impostati:''</font>
 
  <FONT Color=gray>' ''Collega fra loro all'interno della pipeline gli oggetti MediaControl impostati:''</font>
Riga 41: Riga 39:
 
   pl.Play()
 
   pl.Play()
 
    
 
    
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 
   Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)
 
   
 
   
Riga 48: Riga 49:
 
   Until bo
 
   Until bo
 
   
 
   
−
  Copy appoggio To "/tmp" &/ File.BaseName(fileaudio) & ".mp3"
+
<FONT Color=darkgray>' ''E' necessario prevedere sia il Metodo ".Stop" che il Metodo ".Close" della Classe "MediaPipeline", per evitare di ottenere un file audio vuoto:''</font>
−
 
 
   pl.Stop
 
   pl.Stop
 
   pl.Close
 
   pl.Close
Riga 71: Riga 71:
 
  Public Sub Main()
 
  Public Sub Main()
 
    
 
    
−
   Dim fileaudio, appoggio As String
+
   Dim fileaudio As String
 
   Dim pl As MediaPipeline
 
   Dim pl As MediaPipeline
 
   Dim src, wprs, cnv, vor, mux, snk As MediaControl
 
   Dim src, wprs, cnv, vor, mux, snk As MediaControl
 
   
 
   
−
   fileaudio = "<FONT Color=gray>''/percorso/del/file.wav''</font>"
+
   fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.wav''</font>"
−
+
    
−
   appoggio = Temp
 
−
 
 
   pl = New MediaPipeline As "PLine"
 
   pl = New MediaPipeline As "PLine"
 
    
 
    
Riga 89: Riga 87:
 
   mux = New MediaControl(pl, "<FONT Color=#B22222>oggmux</font>")
 
   mux = New MediaControl(pl, "<FONT Color=#B22222>oggmux</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
−
   snk["location"] = appoggio
+
   snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"
 
    
 
    
 
   src.LinkTo(wprs)
 
   src.LinkTo(wprs)
Riga 99: Riga 97:
 
   pl.Play()
 
   pl.Play()
 
   
 
   
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 
   Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Repeat
 
   Repeat
Riga 105: Riga 106:
 
   Until bo
 
   Until bo
 
   
 
   
−
  Copy appoggio To "/tmp" &/ File.BaseName(fileaudio) & ".ogg"
 
 
   pl.Stop
 
   pl.Stop
 
   pl.Close
 
   pl.Close
Riga 114: Riga 114:
 
   
 
   
 
   
 
   
−
  Public Sub PLine_End()
+
  Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 
   
 
   
 
   bo = True
 
   bo = True
Riga 121: Riga 121:
  
  
−
 
+
===Conversione audio dal formato WAV al formato AAC===
−
===Conversione audio dal formato WAV al formato PCM===
+
Private bo As Boolean
−
Con il seguente codice si otterrà da un file WAV i dati audio grezzi nel formato [https://it.wikipedia.org/wiki/Modulazione_a_impulsi_codificati PCM]:
+
 +
 
  Public Sub Main()
 
  Public Sub Main()
 
   
 
   
−
   Dim fileaudio, temporaneo As String
+
   Dim fileaudio As String
 
   Dim pl As MediaPipeline
 
   Dim pl As MediaPipeline
−
   Dim src, wav, res, con, ftr, snk As MediaControl
+
   Dim src, wav, cnv, aac, snk As MediaControl
 +
  Dim flt As MediaFilter
 
   
 
   
 
   fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.wav''</font>"
 
   fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.wav''</font>"
−
 
−
  temporaneo = Temp
 
 
   
 
   
 
   pl = New MediaPipeline As "PLine"
 
   pl = New MediaPipeline As "PLine"
Riga 138: Riga 138:
 
   src = New MediaControl(pl, "filesrc")
 
   src = New MediaControl(pl, "filesrc")
 
   src["location"] = fileaudio
 
   src["location"] = fileaudio
−
 
+
 
   wav = New MediaControl(pl, "wavparse")
 
   wav = New MediaControl(pl, "wavparse")
−
   res = New MediaControl(pl, "audioresample")
+
   cnv = New MediaControl(pl, "audioconvert")
−
   con = New MediaControl(pl, "audioconvert")
+
   aac = New MediaControl(pl, "faac")   <FONT Color=gray>' ''oppure anche "'''voaacenc'''"''</font>
−
   ftr = New MediaFilter(pl, "audio/x-raw,format=S16BE,channels=2,rate=44100")
+
   flt = New MediaFilter(pl, "audio/mpeg,stream-format=adts,channels=2,rate=44100")
 
   snk = New MediaControl(pl, "filesink")
 
   snk = New MediaControl(pl, "filesink")
−
   snk["location"] = temporaneo
+
   snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".aac"
−
+
 
 
   src.LinkTo(wav)
 
   src.LinkTo(wav)
−
   wav.LinkTo(res)
+
   wav.LinkTo(cnv)
−
   res.LinkTo(con)
+
   cnv.LinkTo(aac)
−
   con.LinkTo(ftr)
+
   aac.LinkTo(flt)
−
   ftr.LinkTo(snk)
+
   flt.LinkTo(snk)
 
   
 
   
 
   pl.Play()
 
   pl.Play()
 
   
 
   
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 
   Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)
 +
 
   Repeat
 
   Repeat
 
     Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 
     Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 
     Wait 0.01
 
     Wait 0.01
 
   Until bo
 
   Until bo
−
 
−
  Copy temporaneo To "/tmp" &/ File.BaseName(fileaudio) & ".pcm"
 
 
   
 
   
 
   pl.Stop
 
   pl.Stop
Riga 166: Riga 168:
 
   
 
   
 
   Print "\n\e[0mConversione terminata !"
 
   Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 
   
 
   
 
  End
 
  End
Riga 176: Riga 185:
 
  Public Sub Main()
 
  Public Sub Main()
 
   
 
   
−
   Dim fileaudio, appoggio As String
+
   Dim fileaudio As String
 
   Dim pl As MediaPipeline
 
   Dim pl As MediaPipeline
 
   Dim src, map, mad, vor, mux, snk As MediaControl
 
   Dim src, map, mad, vor, mux, snk As MediaControl
 
   
 
   
−
   fileaudio = "<FONT Color=gray>''/percorso/del/file.mp3''</font>"
+
   fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.mp3''</font>"
−
 
−
  appoggio = Temp
 
 
   
 
   
 
   pl = New MediaPipeline As "PLine"
 
   pl = New MediaPipeline As "PLine"
Riga 188: Riga 195:
 
   src = New MediaControl(pl, "filesrc")
 
   src = New MediaControl(pl, "filesrc")
 
   src["location"] = fileaudio
 
   src["location"] = fileaudio
−
 
+
 
   map = New MediaControl(pl, "<FONT Color=#B22222>mpegaudioparse</font>")
 
   map = New MediaControl(pl, "<FONT Color=#B22222>mpegaudioparse</font>")
 
   mad = New MediaControl(pl, "<FONT Color=#B22222>mpg123audiodec</font>")
 
   mad = New MediaControl(pl, "<FONT Color=#B22222>mpg123audiodec</font>")
Riga 194: Riga 201:
 
   mux = New MediaControl(pl, "<FONT Color=#B22222>oggmux</font>")
 
   mux = New MediaControl(pl, "<FONT Color=#B22222>oggmux</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
−
   snk["location"] = appoggio
+
   snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"
−
 
+
 
   src.LinkTo(map)
 
   src.LinkTo(map)
 
   map.LinkTo(mad)
 
   map.LinkTo(mad)
Riga 203: Riga 210:
 
    
 
    
 
   pl.Play()
 
   pl.Play()
−
    
+
 +
   While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 
   Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Repeat
 
   Repeat
Riga 209: Riga 219:
 
     Wait 0.01
 
     Wait 0.01
 
   Until bo
 
   Until bo
−
 
−
  Copy appoggio To "/tmp" &/ File.BaseName(fileaudio) & ".ogg"
 
 
   
 
   
 
   pl.Stop
 
   pl.Stop
Riga 220: Riga 228:
 
   
 
   
 
   
 
   
−
  Public Sub PLine_End()
+
  Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 
   
 
   
 
   bo = True
 
   bo = True
Riga 233: Riga 241:
 
  Public Sub Main()
 
  Public Sub Main()
 
   
 
   
−
   Dim fileaudio, appoggio As String
+
   Dim fileaudio As String
 
   Dim pl As MediaPipeline
 
   Dim pl As MediaPipeline
 
   Dim src, map, mad, wav, snk As MediaControl
 
   Dim src, map, mad, wav, snk As MediaControl
 
   
 
   
−
   fileaudio = "<FONT Color=gray>''/percorso/del/file.mp3''</font>"
+
   fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.mp3''</font>"
 
   
 
   
−
   appoggio = Temp
+
   pl = New MediaPipeline As "PLine"
 
   
 
   
−
  pl = New MediaPipeline As "PLine"
 
−
 
 
 
   src = New MediaControl(pl, "filesrc")
 
   src = New MediaControl(pl, "filesrc")
 
   src["location"] = fileaudio
 
   src["location"] = fileaudio
−
 
+
 
   map = New MediaControl(pl, "<FONT Color=#B22222>mpegaudioparse</font>")
 
   map = New MediaControl(pl, "<FONT Color=#B22222>mpegaudioparse</font>")
 
   mad = New MediaControl(pl, "<FONT Color=#B22222>mpg123audiodec</font>")
 
   mad = New MediaControl(pl, "<FONT Color=#B22222>mpg123audiodec</font>")
 
   wav = New MediaControl(pl, "<FONT Color=#B22222>wavenc</font>")
 
   wav = New MediaControl(pl, "<FONT Color=#B22222>wavenc</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
−
   snk["location"] = appoggio
+
   snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"
−
 
+
 
   src.LinkTo(map)
 
   src.LinkTo(map)
 
   map.LinkTo(mad)
 
   map.LinkTo(mad)
 
   mad.LinkTo(wav)
 
   mad.LinkTo(wav)
 
   wav.LinkTo(snk)
 
   wav.LinkTo(snk)
−
 
+
 
   pl.Play()
 
   pl.Play()
 
   
 
   
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 
   Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Repeat
 
   Repeat
Riga 265: Riga 274:
 
   Until bo
 
   Until bo
 
   
 
   
−
   Copy appoggio To "/tmp" &/ File.BaseName(fileaudio) & ".wav"
+
   pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato MP3 al formato AAC===
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, map, mad, aac, snk As MediaControl
 +
  Dim flt As MediaFilter
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.mp3''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  map = New MediaControl(pl, "<FONT Color=#B22222>mpegaudioparse</font>")
 +
  mad = New MediaControl(pl, "<FONT Color=#B22222>mpg123audiodec</font>")
 +
  aac = New MediaControl(pl, "faac")  <FONT Color=gray>' ''oppure anche "'''voaacenc'''"''</font>
 +
  flt = New MediaFilter(pl, "audio/mpeg,stream-format=adts,channels=2,rate=44100")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".aac"
 +
 
 +
  src.LinkTo(map)
 +
  map.LinkTo(mad)
 +
  mad.LinkTo(aac)
 +
  aac.LinkTo(flt)
 +
  flt.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)
 +
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 
   
 
   
 
   pl.Stop
 
   pl.Stop
Riga 275: Riga 339:
 
   
 
   
 
   
 
   
−
  Public Sub PLine_End()
+
  Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 
   
 
   
 
   bo = True
 
   bo = True
Riga 289: Riga 353:
 
  Public Sub Main()
 
  Public Sub Main()
 
   
 
   
−
   Dim fileaudio, appoggio As String
+
   Dim fileaudio As String
 
   Dim pl As MediaPipeline
 
   Dim pl As MediaPipeline
 
   Dim src, par, dcd, snk As MediaControl
 
   Dim src, par, dcd, snk As MediaControl
−
   Dim fil As MediaFilter
+
   Dim flt As MediaFilter
−
 
−
  fileaudio = "<FONT Color=gray>''/percorso/del/file.mp3''</font>"
 
 
   
 
   
−
   appoggio = Temp
+
   fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.mp3''</font>"
 
   
 
   
 
   pl = New MediaPipeline As "PLine"
 
   pl = New MediaPipeline As "PLine"
Riga 302: Riga 364:
 
   src = New MediaControl(pl, "filesrc")
 
   src = New MediaControl(pl, "filesrc")
 
   src["location"] = fileaudio
 
   src["location"] = fileaudio
−
 
+
 
   par = New MediaControl(pl, "<FONT Color=#B22222>mpegaudioparse</font>")
 
   par = New MediaControl(pl, "<FONT Color=#B22222>mpegaudioparse</font>")
 
   dcd = New MediaControl(pl, "<FONT Color=#B22222>mpg123audiodec</font>")
 
   dcd = New MediaControl(pl, "<FONT Color=#B22222>mpg123audiodec</font>")
−
   fil = New MediaFilter(pl, "<FONT Color=#B22222>audio/x-raw, format=S16LE, rate=44100, channels=2, endianness=1234, width=16, depth=16</font>")
+
   flt = New MediaFilter(pl, "<FONT Color=#B22222>audio/x-raw, format=S16LE, rate=44100, channels=2, endianness=1234, width=16, depth=16</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
−
   snk["location"] = appoggio
+
   snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".raw"
 
   
 
   
 
   src.LinkTo(par)
 
   src.LinkTo(par)
 
   par.LinkTo(dcd)
 
   par.LinkTo(dcd)
−
   dcd.LinkTo(fil)
+
   dcd.LinkTo(flt)
−
   fil.LinkTo(snk)
+
   flt.LinkTo(snk)
 
   
 
   
 
   pl.Play()
 
   pl.Play()
 
   
 
   
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 
   Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 
   Repeat
 
   Repeat
Riga 321: Riga 386:
 
     Wait 0.01
 
     Wait 0.01
 
   Until bo
 
   Until bo
 +
 
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 
 +
End
 +
 +
 +
===Conversione audio dal formato OGG-Vorbis al formato MP3===
 +
Private Const QUALITY As String = "quality"
 +
Private Const BITRATE As String = "bitrate"
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, ogg, vor, cnv, lam, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.ogg''</font>"
 +
 
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
 +
  ogg = New MediaControl(pl, "oggdemux")
 +
  vor = New MediaControl(pl, "vorbisdec")
 +
  cnv = New MediaControl(pl, "audioconvert")
 +
  lam = New MediaControl(pl, "lamemp3enc")
 +
  lam["target"] = BITRATE    ' Imposta il Bitrate.
 +
  lam["cbr"] = True          ' Imposta il Bitrate "Costante".
 +
  lam["bitrate"] = 192      ' Imposta il valore del Bitrate "Costante".
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"
 +
 +
  src.LinkTo(ogg)
 +
  ogg.LinkLaterTo(vor)
 +
  vor.LinkTo(cnv)
 +
  cnv.LinkTo(lam)
 +
  lam.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  Print "Durata del file ogg: "; Time(0, 0, 0, pl.Duration * 1000)
 +
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 
   
 
   
−
   Copy appoggio To "/tmp" &/ File.BaseName(fileaudio) & ".raw"
+
   bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato OGG-Vorbis al formato AAC===
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, ogg, vor, con, aac, snk As MediaControl
 +
  Dim flt As MediaFilter
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.ogg''</font>"
 +
 
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  ogg = New MediaControl(pl, "oggdemux")
 +
  vor = New MediaControl(pl, "vorbisdec")
 +
  con = New MediaControl(pl, "audioconvert")
 +
  aac = New MediaControl(pl, "faac")  <FONT Color=gray>' ''oppure anche "'''voaacenc'''"''</font>
 +
  flt = New MediaFilter(pl, "audio/mpeg,stream-format=adts,channels=2,rate=44100")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".acc"
 +
 +
  src.LinkTo(ogg)
 +
  ogg.LinkLaterTo(vor)
 +
  vor.LinkTo(con)
 +
  con.LinkTo(aac)
 +
  aac.LinkTo(flt)
 +
  flt.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  Print "Durata del file ogg: "; Time(0, 0, 0, pl.Duration * 1000)
 +
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 
   
 
   
 
   pl.Stop
 
   pl.Stop
Riga 332: Riga 510:
 
   
 
   
 
   
 
   
−
  Public Sub PLine_End()
+
  Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 
   
 
   
 
   bo = True
 
   bo = True
−
    
+
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato RAW al formato WAV===
 +
Il seguente codice prevede che i dati del file audio [https://it.wikipedia.org/wiki/Formato_Audio_RAW RAW] abbiano le seguenti caratteristiche: frequenza di campionamento = 44100; numero di canali = 2; modalità ''interleaved'' e [https://gstreamer.freedesktop.org/documentation/audio/audio-format.html?gi-language=c#GstAudioFormat formato-pcm] = S16LE.
 +
Private Const GST_AUDIO_FORMAT_S16LE As Integer = 4
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, raw, wav, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/raw''</font>"
 +
 
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
 
 +
  raw = New MediaControl(pl, "rawaudioparse")
 +
  raw["interleaved"] = True
 +
  raw["num-channels"] = 2
 +
  raw["pcm-format"] = GST_AUDIO_FORMAT_S16LE
 +
  raw["sample-rate"] = 44100
 +
  wav = New MediaControl(pl, "wavenc")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"
 +
 +
  src.LinkTo(raw)
 +
  raw.LinkTo(wav)
 +
  wav.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  Print "Durata del file raw: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato RAW al formato MP3===
 +
Private Const GST_AUDIO_FORMAT_S16LE As Integer = 4
 +
Private Const QUALITY As String = "quality"
 +
Private Const BITRATE As String = "bitrate"
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, raw, lam, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/raw''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
 
 +
  raw = New MediaControl(pl, "rawaudioparse")
 +
  raw["interleaved"] = True
 +
  raw["num-channels"] = 2
 +
  raw["pcm-format"] = GST_AUDIO_FORMAT_S16LE
 +
  raw["sample-rate"] = 44100
 +
  lam = New MediaControl(pl, "lamemp3enc")
 +
  lam["target"] = BITRATE   <FONT Color=gray>' ''Imposta il Bitrate''</font>
 +
  lam["cbr"] = True          <FONT Color=gray>' ''Imposta il Bitrate "Costante"''</font>
 +
  lam["bitrate"] = 192      <FONT Color=gray>' ''Imposta il valore del Bitrate "Costante"''</font>
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"
 +
 +
  src.LinkTo(raw)
 +
  raw.LinkTo(lam)
 +
  lam.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file raw: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato RAW al formato OGG-Vorbis===
 +
Private Const GST_AUDIO_FORMAT_S16LE As Integer = 4
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, raw, cnv, vor, mux, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/raw''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
 
 +
  raw = New MediaControl(pl, "rawaudioparse")
 +
  raw["interleaved"] = True
 +
  raw["num-channels"] = 2
 +
  raw["pcm-format"] = GST_AUDIO_FORMAT_S16LE
 +
  raw["sample-rate"] = 44100
 +
  cnv = New MediaControl(pl, "audioconvert")
 +
  vor = New MediaControl(pl, "vorbisenc")
 +
  mux = New MediaControl(pl, "oggmux")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"
 +
 +
  src.LinkTo(raw)
 +
  raw.LinkTo(cnv)
 +
  cnv.LinkTo(vor)
 +
  vor.LinkTo(mux)
 +
  mux.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file raw: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato RAW al formato AAC===
 +
Private Const GST_AUDIO_FORMAT_S16LE As Integer = 4
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, raw, aac, snk As MediaControl
 +
  Dim flt As MediaFilter
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/raw''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
 
 +
  raw = New MediaControl(pl, "rawaudioparse")
 +
  raw["interleaved"] = True
 +
  raw["num-channels"] = 2
 +
  raw["pcm-format"] = GST_AUDIO_FORMAT_S16LE
 +
  raw["sample-rate"] = 44100
 +
  aac = New MediaControl(pl, "faac")  <FONT Color=gray>' ''oppure anche "'''voaacenc'''"''</font>
 +
  flt = New MediaFilter(pl, "audio/mpeg,stream-format=adts,channels=2,rate=44100")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".aac"
 +
 +
  src.LinkTo(raw)
 +
  raw.LinkTo(aac)
 +
  aac.LinkTo(flt)
 +
  flt.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  Print "Durata del file raw: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato FLAC al formato WAV===
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, flp, fld, wav, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/flac''</font>"
 +
 
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  flp = New MediaControl(pl, "flacparse")
 +
  fld = New MediaControl(pl, "flacdec")
 +
  wav = New MediaControl(pl, "wavenc")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"
 +
 +
  src.LinkTo(flp)
 +
  flp.LinkTo(fld)
 +
  fld.LinkTo(wav)
 +
  wav.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file Flac: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato FLAC al formato MP3===
 +
Private Const QUALITY As String = "quality"
 +
Private Const BITRATE As String = "bitrate"
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, flp, fld, lam, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/flac''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  flp = New MediaControl(pl, "flacparse")
 +
  fld = New MediaControl(pl, "flacdec")
 +
  lam = New MediaControl(pl, "lamemp3enc")
 +
  lam["target"] = BITRATE
 +
  lam["cbr"] = True
 +
  lam["bitrate"] = 192
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"
 +
 +
  src.LinkTo(flp)
 +
  flp.LinkTo(fld)
 +
  fld.LinkTo(lam)
 +
  lam.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file Flac: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato FLAC al formato OGG-Vorbis===
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, flp, fld, cnv, vor, mux, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/flac''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  flp = New MediaControl(pl, "flacparse")
 +
  fld = New MediaControl(pl, "flacdec")
 +
  cnv = New MediaControl(pl, "audioconvert")
 +
  vor = New MediaControl(pl, "vorbisenc")
 +
  mux = New MediaControl(pl, "oggmux")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"
 +
 +
  src.LinkTo(flp)
 +
  flp.LinkTo(fld)
 +
  fld.LinkTo(cnv)
 +
  cnv.LinkTo(vor)
 +
  vor.LinkTo(mux)
 +
  mux.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file flac: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato AAC al formato WAV===
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, aac, wav, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/aac''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  aac = New MediaControl(pl, "faad")  <FONT Color=gray>' ''oppure anche "'''voaacenc'''"''</font>
 +
  wav = New MediaControl(pl, "wavenc")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"
 +
 +
  src.LinkTo(aac)
 +
  aac.LinkTo(wav)
 +
  wav.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file aac: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato AAC al formato MP3===
 +
Private Const QUALITY As String = "quality"
 +
Private Const BITRATE As String = "bitrate"
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, aac, lam, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/aac''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  aac = New MediaControl(pl, "faad")  <FONT Color=gray>' ''oppure anche "'''voaacenc'''"''</font>
 +
  lam = New MediaControl(pl, "lamemp3enc")
 +
  lam["target"] = BITRATE
 +
  lam["cbr"] = True
 +
  lam["bitrate"] = 192
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"
 +
 +
  src.LinkTo(aac)
 +
  aac.LinkTo(lam)
 +
  lam.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file Acc: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato AAC al formato OGG-Vorbis===
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, aac, cnv, vor, mux, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/aac''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  aac = New MediaControl(pl, "faad")  <FONT Color=gray>' ''oppure anche "'''voaacenc'''"''</font>
 +
  cnv = New MediaControl(pl, "audioconvert")
 +
  vor = New MediaControl(pl, "vorbisenc")
 +
  mux = New MediaControl(pl, "oggmux")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"
 +
 +
  src.LinkTo(aac)
 +
  aac.LinkTo(cnv)
 +
  cnv.LinkTo(vor)
 +
  vor.LinkTo(mux)
 +
  mux.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file aac: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato AAC al formato RAW===
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, aac, snk As MediaControl
 +
  Dim flt As MediaFilter
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/aac''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  aac = New MediaControl(pl, "faad")  <FONT Color=gray>' ''oppure anche "'''voaacenc'''"''</font>
 +
  flt = New MediaFilter(pl, "audio/x-raw, format=S16LE, rate=44100, channels=2, endianness=1234, width=16, depth=16")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".raw"
 +
 +
  src.LinkTo(aac)
 +
  aac.LinkTo(flt)
 +
  flt.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file aac: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato AIFF al formato WAV===
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, aif, cnv, wav, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/aiff''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  aif = New MediaControl(pl, "aiffparse")
 +
  cnv = New MediaControl(pl, "audioconvert")
 +
  wav = New MediaControl(pl, "wavenc")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"
 +
 +
  src.LinkTo(aif)
 +
  aif.LinkTo(cnv)
 +
  cnv.LinkTo(wav)
 +
  wav.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file aiff: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato AIFF al formato MP3===
 +
Private Const QUALITY As String = "quality"
 +
Private Const BITRATE As String = "bitrate"
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, aif, cnv, lam, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/aiff''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  aac = New MediaControl(pl, "aiffparse")
 +
  cnv = New MediaControl(pl, "audioconvert")
 +
  lam = New MediaControl(pl, "lamemp3enc")
 +
  lam["target"] = BITRATE
 +
  lam["cbr"] = True
 +
  lam["bitrate"] = 192
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"
 +
 +
  src.LinkTo(aif)
 +
  aif.LinkTo(cnv)
 +
  cnv.LinkTo(lam)
 +
  lam.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file aiff: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 +
End
 +
 
 +
 
 +
===Conversione audio dal formato AIFF al formato OGG-Vorbis===
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, aif, cnv, vor, mux, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file/aiff''</font>"
 +
 
 +
  pl = New MediaPipeline As "PLine"
 +
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  aac = New MediaControl(pl, "aiffparse")
 +
  cnv = New MediaControl(pl, "audioconvert")
 +
  vor = New MediaControl(pl, "vorbisenc")
 +
  mux = New MediaControl(pl, "oggmux")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"
 +
 +
  src.LinkTo(aif)
 +
  aif.LinkTo(cnv)
 +
  cnv.LinkTo(vor)
 +
  vor.LinkTo(mux)
 +
  mux.LinkTo(snk)
 +
 +
  pl.Play()
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file aiff: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
    Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 +
 +
  pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 
  End
 
  End
 +
  
  
Riga 347: Riga 1 309:
 
  Public Sub Main()
 
  Public Sub Main()
 
   
 
   
−
   Dim fileaudio, appoggio As String
+
   Dim fileaudio As String
 
   Dim pl As MediaPipeline
 
   Dim pl As MediaPipeline
 
   Dim src, dcb, con, flt, wav, snk As MediaControl
 
   Dim src, dcb, con, flt, wav, snk As MediaControl
 
   
 
   
−
   fileaudio = "<FONT Color=gray>''/percorso/del/file.ogg''</font>"
+
   fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.ogg''</font>"
−
 
−
  appoggio = Temp
 
 
   
 
   
 
   pl = New MediaPipeline As "PLine"
 
   pl = New MediaPipeline As "PLine"
Riga 365: Riga 1 325:
 
   wav = New MediaControl(pl, "<FONT Color=#B22222>wavenc</font>")
 
   wav = New MediaControl(pl, "<FONT Color=#B22222>wavenc</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
 
   snk = New MediaControl(pl, "<FONT Color=#B22222>filesink</font>")
−
   snk["location"] = appoggio
+
   snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"
 
    
 
    
 
   src.LinkTo(dcb)
 
   src.LinkTo(dcb)
 
   dcb.LinkLaterTo(con)
 
   dcb.LinkLaterTo(con)
−
   con.LinkTo(fil)
+
   con.LinkTo(flt)
−
   fil.LinkTo(wav)
+
   flt.LinkTo(wav)
 
   wav.LinkTo(snk)
 
   wav.LinkTo(snk)
 
   
 
   
Riga 381: Riga 1 341:
 
   Until bo
 
   Until bo
 
   
 
   
−
   Copy appoggio To "/tmp" &/ File.BaseName(fileaudio) & ".wav"
+
   pl.Stop
 +
  pl.Close
 +
 +
  Print "\n\e[0mConversione terminata !"
 +
 +
End
 +
 +
 +
Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 +
 +
  bo = True
 +
 
 +
End
 +
Se si vuole convertire in un file avente caratteristiche (frequenza di campionamento, numero dei canali, risoluzione in bit) dei propri campioni audio diverse da quelle del file originario, da convertire, allora si dovranno usare l'elemento "audioresample" e la Classe ''MediaFilter''.
 +
 
 +
Mostriamo un esempio pratico, nel quale si convertirà un file MP3 in un file WAV avente frequenza di campionamento uguale a 22050 hertz e risoluzione a 8 bit:
 +
Private bo As Boolean
 +
 +
 +
Public Sub Main()
 +
 +
  Dim fileaudio As String
 +
  Dim pl As MediaPipeline
 +
  Dim src, dcb, con, res, flt, wav, snk As MediaControl
 +
 +
  fileaudio = "<FONT Color=darkgreen>''/percorso/del/file.mp3''</font>"
 +
 +
  pl = New MediaPipeline As "PLine"
 +
 
 +
  src = New MediaControl(pl, "filesrc")
 +
  src["location"] = fileaudio
 +
  dcb = New MediaControl(pl, "decodebin")
 +
  con = New MediaControl(pl, "audioconvert")
 +
  res = New MediaControl(pl, "audioresample") <FONT Color=gray>' ''Consente di modificare le caratteristiche del file audio''</font>
 +
  flt = New MediaFilter(pl, "audio/x-raw,rate=22050,format=U8")
 +
  wav = New MediaFilter(pl, "wavenc")
 +
  snk = New MediaControl(pl, "filesink")
 +
  snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"
 +
 +
  src.LinkTo(dcb)
 +
  dcb.LinkLaterTo(con)
 +
  con.LinkTo(res)
 +
  res.LinkTo(flt)
 +
  flt.LinkTo(wav)
 +
  wav.LinkTo(snk)
 +
 
 +
  pl.play
 +
 +
  While pl.Duration < 1
 +
    Wait 0.01
 +
  Wend
 +
  Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 +
  Repeat
 +
  Write "\r\e[0mTempo trascorso:    \e[31m" & Time(0, 0, 0, pl.Position * 1000)
 +
    Wait 0.01
 +
  Until bo
 
   
 
   
 
   pl.Stop
 
   pl.Stop
Riga 391: Riga 1 406:
 
   
 
   
 
   
 
   
−
  Public Sub PLine_End()
+
  Public Sub PLine_End() <FONT Color=gray>' ''Questo Evento viene sollevato, quando la conversione è terminata''</font>
 
   
 
   
 
   bo = True
 
   bo = True
−
 
+
 
  End
 
  End

Versione attuale delle 17:43, 17 gen 2024

Utilizzando i plugin di GStreamer con le Classi MediaControl e MediaPipeline del Componente gb.media, è possibile effettuare diverse conversioni di file audio da un formato ad un altro.

Mostriamo di seguito qualche esempio pratico.

Conversione audio dal formato WAV al formato MP3

Private Const QUALITY As String = "quality"
Private Const BITRATE As String = "bitrate"
Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, wprs, cnv, lam, snk As MediaControl

 fileaudio = "/percorso/del/file.wav"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio

 wprs = New MediaControl(pl, "wavparse")
 cnv = New MediaControl(pl, "audioconvert")
 lam = New MediaControl(pl, "lamemp3enc")
 lam["target"] = BITRATE    ' Imposta il Bitrate.
 lam["cbr"] = True          ' Imposta il Bitrate "Costante".
 lam["bitrate"] = 192       ' Imposta il valore del Bitrate "Costante".
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"
 
' Collega fra loro all'interno della pipeline gli oggetti MediaControl impostati:
 src.LinkTo(wprs)
 wprs.LinkTo(cnv)
 cnv.LinkTo(lam)
 lam.LinkTo(snk)

 pl.Play()
 
 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)

 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

' E' necessario prevedere sia il Metodo ".Stop" che il Metodo ".Close" della Classe "MediaPipeline", per evitare di ottenere un file audio vuoto:
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato WAV al formato OGG

Private bo As Boolean


Public Sub Main()
 
 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, wprs, cnv, vor, mux, snk As MediaControl

 fileaudio = "/percorso/del/file.wav"
 
 pl = New MediaPipeline As "PLine"
  
 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 
 wprs = New MediaControl(pl, "wavparse")
 cnv = New MediaControl(pl, "audioconvert")
 vor = New MediaControl(pl, "vorbisenc")
 mux = New MediaControl(pl, "oggmux")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"
 
 src.LinkTo(wprs)
 wprs.LinkTo(cnv)
 cnv.LinkTo(vor)
 vor.LinkTo(mux)
 mux.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato WAV al formato AAC

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, wav, cnv, aac, snk As MediaControl
 Dim flt As MediaFilter

 fileaudio = "/percorso/del/file.wav"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio

 wav = New MediaControl(pl, "wavparse")
 cnv = New MediaControl(pl, "audioconvert")
 aac = New MediaControl(pl, "faac")   ' oppure anche "voaacenc"
 flt = New MediaFilter(pl, "audio/mpeg,stream-format=adts,channels=2,rate=44100")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".aac"
 
 src.LinkTo(wav)
 wav.LinkTo(cnv)
 cnv.LinkTo(aac)
 aac.LinkTo(flt)
 flt.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)

 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato MP3 al formato OGG

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, map, mad, vor, mux, snk As MediaControl

 fileaudio = "/percorso/del/file.mp3"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio

 map = New MediaControl(pl, "mpegaudioparse")
 mad = New MediaControl(pl, "mpg123audiodec")
 vor = New MediaControl(pl, "vorbisenc")
 mux = New MediaControl(pl, "oggmux")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"

 src.LinkTo(map)
 map.LinkTo(mad)
 mad.LinkTo(vor)
 vor.LinkTo(mux)
 mux.LinkTo(snk)
 
 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato MP3 al formato WAV

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, map, mad, wav, snk As MediaControl

 fileaudio = "/percorso/del/file.mp3"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio

 map = New MediaControl(pl, "mpegaudioparse")
 mad = New MediaControl(pl, "mpg123audiodec")
 wav = New MediaControl(pl, "wavenc")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"

 src.LinkTo(map)
 map.LinkTo(mad)
 mad.LinkTo(wav)
 wav.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato MP3 al formato AAC

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, map, mad, aac, snk As MediaControl
 Dim flt As MediaFilter

 fileaudio = "/percorso/del/file.mp3"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 map = New MediaControl(pl, "mpegaudioparse")
 mad = New MediaControl(pl, "mpg123audiodec")
 aac = New MediaControl(pl, "faac")   ' oppure anche "voaacenc"
 flt = New MediaFilter(pl, "audio/mpeg,stream-format=adts,channels=2,rate=44100")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".aac"
 
 src.LinkTo(map)
 map.LinkTo(mad)
 mad.LinkTo(aac)
 aac.LinkTo(flt)
 flt.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file wav: "; Time(0, 0, 0, pl.Duration * 1000)

 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato MP3 al formato RAW

Con il seguente codice si otterranno da un file MP3 i dati audio grezzi nel formato: frequenza di campionamento = 44100, risoluzione = 16 bit, canali = 2. 

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, par, dcd, snk As MediaControl
 Dim flt As MediaFilter

 fileaudio = "/percorso/del/file.mp3"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio

 par = New MediaControl(pl, "mpegaudioparse")
 dcd = New MediaControl(pl, "mpg123audiodec")
 flt = New MediaFilter(pl, "audio/x-raw, format=S16LE, rate=44100, channels=2, endianness=1234, width=16, depth=16")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".raw"

 src.LinkTo(par)
 par.LinkTo(dcd)
 dcd.LinkTo(flt)
 flt.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo
 
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True
  
End


Conversione audio dal formato OGG-Vorbis al formato MP3

Private Const QUALITY As String = "quality"
Private Const BITRATE As String = "bitrate"
Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, ogg, vor, cnv, lam, snk As MediaControl

 fileaudio = "/percorso/del/file.ogg"
 
 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio

 ogg = New MediaControl(pl, "oggdemux")
 vor = New MediaControl(pl, "vorbisdec")
 cnv = New MediaControl(pl, "audioconvert")
 lam = New MediaControl(pl, "lamemp3enc")
 lam["target"] = BITRATE    ' Imposta il Bitrate.
 lam["cbr"] = True          ' Imposta il Bitrate "Costante".
 lam["bitrate"] = 192       ' Imposta il valore del Bitrate "Costante".
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"

 src.LinkTo(ogg)
 ogg.LinkLaterTo(vor)
 vor.LinkTo(cnv)
 cnv.LinkTo(lam)
 lam.LinkTo(snk)

 pl.Play()

 Print "Durata del file ogg: "; Time(0, 0, 0, pl.Duration * 1000)

 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato OGG-Vorbis al formato AAC

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, ogg, vor, con, aac, snk As MediaControl
 Dim flt As MediaFilter

 fileaudio = "/percorso/del/file.ogg"
 
 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 ogg = New MediaControl(pl, "oggdemux")
 vor = New MediaControl(pl, "vorbisdec")
 con = New MediaControl(pl, "audioconvert")
 aac = New MediaControl(pl, "faac")   ' oppure anche "voaacenc"
 flt = New MediaFilter(pl, "audio/mpeg,stream-format=adts,channels=2,rate=44100")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".acc"

 src.LinkTo(ogg)
 ogg.LinkLaterTo(vor)
 vor.LinkTo(con)
 con.LinkTo(aac)
 aac.LinkTo(flt)
 flt.LinkTo(snk)

 pl.Play()

 Print "Durata del file ogg: "; Time(0, 0, 0, pl.Duration * 1000)

 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato RAW al formato WAV

Il seguente codice prevede che i dati del file audio RAW abbiano le seguenti caratteristiche: frequenza di campionamento = 44100; numero di canali = 2; modalità interleaved e formato-pcm = S16LE. 

Private Const GST_AUDIO_FORMAT_S16LE As Integer = 4
Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, raw, wav, snk As MediaControl

 fileaudio = "/percorso/del/file/raw"
 
 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 
 raw = New MediaControl(pl, "rawaudioparse")
 raw["interleaved"] = True
 raw["num-channels"] = 2
 raw["pcm-format"] = GST_AUDIO_FORMAT_S16LE
 raw["sample-rate"] = 44100
 wav = New MediaControl(pl, "wavenc")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"

 src.LinkTo(raw)
 raw.LinkTo(wav)
 wav.LinkTo(snk)

 pl.Play()

 Print "Durata del file raw: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato RAW al formato MP3

Private Const GST_AUDIO_FORMAT_S16LE As Integer = 4
Private Const QUALITY As String = "quality"
Private Const BITRATE As String = "bitrate"
Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, raw, lam, snk As MediaControl

 fileaudio = "/percorso/del/file/raw"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 
 raw = New MediaControl(pl, "rawaudioparse")
 raw["interleaved"] = True
 raw["num-channels"] = 2
 raw["pcm-format"] = GST_AUDIO_FORMAT_S16LE
 raw["sample-rate"] = 44100
 lam = New MediaControl(pl, "lamemp3enc")
 lam["target"] = BITRATE    ' Imposta il Bitrate
 lam["cbr"] = True          ' Imposta il Bitrate "Costante"
 lam["bitrate"] = 192       ' Imposta il valore del Bitrate "Costante"
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"

 src.LinkTo(raw)
 raw.LinkTo(lam)
 lam.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file raw: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato RAW al formato OGG-Vorbis

Private Const GST_AUDIO_FORMAT_S16LE As Integer = 4
Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, raw, cnv, vor, mux, snk As MediaControl

 fileaudio = "/percorso/del/file/raw"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 
 raw = New MediaControl(pl, "rawaudioparse")
 raw["interleaved"] = True
 raw["num-channels"] = 2
 raw["pcm-format"] = GST_AUDIO_FORMAT_S16LE
 raw["sample-rate"] = 44100
 cnv = New MediaControl(pl, "audioconvert")
 vor = New MediaControl(pl, "vorbisenc")
 mux = New MediaControl(pl, "oggmux")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"

 src.LinkTo(raw)
 raw.LinkTo(cnv)
 cnv.LinkTo(vor)
 vor.LinkTo(mux)
 mux.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file raw: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato RAW al formato AAC

Private Const GST_AUDIO_FORMAT_S16LE As Integer = 4
Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, raw, aac, snk As MediaControl
 Dim flt As MediaFilter

 fileaudio = "/percorso/del/file/raw"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 
 raw = New MediaControl(pl, "rawaudioparse")
 raw["interleaved"] = True
 raw["num-channels"] = 2
 raw["pcm-format"] = GST_AUDIO_FORMAT_S16LE
 raw["sample-rate"] = 44100
 aac = New MediaControl(pl, "faac")   ' oppure anche "voaacenc"
 flt = New MediaFilter(pl, "audio/mpeg,stream-format=adts,channels=2,rate=44100")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".aac"

 src.LinkTo(raw)
 raw.LinkTo(aac)
 aac.LinkTo(flt)
 flt.LinkTo(snk)

 pl.Play()

 Print "Durata del file raw: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo
 
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato FLAC al formato WAV

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, flp, fld, wav, snk As MediaControl

 fileaudio = "/percorso/del/file/flac"
 
 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 flp = New MediaControl(pl, "flacparse")
 fld = New MediaControl(pl, "flacdec")
 wav = New MediaControl(pl, "wavenc")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"

 src.LinkTo(flp)
 flp.LinkTo(fld)
 fld.LinkTo(wav)
 wav.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file Flac: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo
 
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato FLAC al formato MP3

Private Const QUALITY As String = "quality"
Private Const BITRATE As String = "bitrate"
Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, flp, fld, lam, snk As MediaControl

 fileaudio = "/percorso/del/file/flac"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 flp = New MediaControl(pl, "flacparse")
 fld = New MediaControl(pl, "flacdec")
 lam = New MediaControl(pl, "lamemp3enc")
 lam["target"] = BITRATE
 lam["cbr"] = True
 lam["bitrate"] = 192
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"

 src.LinkTo(flp)
 flp.LinkTo(fld)
 fld.LinkTo(lam)
 lam.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file Flac: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato FLAC al formato OGG-Vorbis

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, flp, fld, cnv, vor, mux, snk As MediaControl

 fileaudio = "/percorso/del/file/flac"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 flp = New MediaControl(pl, "flacparse")
 fld = New MediaControl(pl, "flacdec")
 cnv = New MediaControl(pl, "audioconvert")
 vor = New MediaControl(pl, "vorbisenc")
 mux = New MediaControl(pl, "oggmux")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"

 src.LinkTo(flp)
 flp.LinkTo(fld)
 fld.LinkTo(cnv)
 cnv.LinkTo(vor)
 vor.LinkTo(mux)
 mux.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file flac: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo
 
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato AAC al formato WAV

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, aac, wav, snk As MediaControl

 fileaudio = "/percorso/del/file/aac"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 aac = New MediaControl(pl, "faad")   ' oppure anche "voaacenc"
 wav = New MediaControl(pl, "wavenc")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"

 src.LinkTo(aac)
 aac.LinkTo(wav)
 wav.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file aac: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo
 
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato AAC al formato MP3

Private Const QUALITY As String = "quality"
Private Const BITRATE As String = "bitrate"
Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, aac, lam, snk As MediaControl

 fileaudio = "/percorso/del/file/aac"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 aac = New MediaControl(pl, "faad")   ' oppure anche "voaacenc"
 lam = New MediaControl(pl, "lamemp3enc")
 lam["target"] = BITRATE
 lam["cbr"] = True
 lam["bitrate"] = 192
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"

 src.LinkTo(aac)
 aac.LinkTo(lam)
 lam.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file Acc: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo
 
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato AAC al formato OGG-Vorbis

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, aac, cnv, vor, mux, snk As MediaControl

 fileaudio = "/percorso/del/file/aac"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 aac = New MediaControl(pl, "faad")   ' oppure anche "voaacenc"
 cnv = New MediaControl(pl, "audioconvert")
 vor = New MediaControl(pl, "vorbisenc")
 mux = New MediaControl(pl, "oggmux")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"

 src.LinkTo(aac)
 aac.LinkTo(cnv)
 cnv.LinkTo(vor)
 vor.LinkTo(mux)
 mux.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file aac: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo
 
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato AAC al formato RAW

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, aac, snk As MediaControl
 Dim flt As MediaFilter

 fileaudio = "/percorso/del/file/aac"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 aac = New MediaControl(pl, "faad")   ' oppure anche "voaacenc"
 flt = New MediaFilter(pl, "audio/x-raw, format=S16LE, rate=44100, channels=2, endianness=1234, width=16, depth=16")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".raw"

 src.LinkTo(aac)
 aac.LinkTo(flt)
 flt.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file aac: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato AIFF al formato WAV

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, aif, cnv, wav, snk As MediaControl

 fileaudio = "/percorso/del/file/aiff"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 aif = New MediaControl(pl, "aiffparse")
 cnv = New MediaControl(pl, "audioconvert")
 wav = New MediaControl(pl, "wavenc")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"

 src.LinkTo(aif)
 aif.LinkTo(cnv)
 cnv.LinkTo(wav)
 wav.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file aiff: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo
 
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato AIFF al formato MP3

Private Const QUALITY As String = "quality"
Private Const BITRATE As String = "bitrate"
Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, aif, cnv, lam, snk As MediaControl

 fileaudio = "/percorso/del/file/aiff"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 aac = New MediaControl(pl, "aiffparse")
 cnv = New MediaControl(pl, "audioconvert")
 lam = New MediaControl(pl, "lamemp3enc")
 lam["target"] = BITRATE
 lam["cbr"] = True
 lam["bitrate"] = 192
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".mp3"

 src.LinkTo(aif)
 aif.LinkTo(cnv)
 cnv.LinkTo(lam)
 lam.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file aiff: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo
 
 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio dal formato AIFF al formato OGG-Vorbis

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, aif, cnv, vor, mux, snk As MediaControl

 fileaudio = "/percorso/del/file/aiff"
 
 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 aac = New MediaControl(pl, "aiffparse")
 cnv = New MediaControl(pl, "audioconvert")
 vor = New MediaControl(pl, "vorbisenc")
 mux = New MediaControl(pl, "oggmux")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".ogg"

 src.LinkTo(aif)
 aif.LinkTo(cnv)
 cnv.LinkTo(vor)
 vor.LinkTo(mux)
 mux.LinkTo(snk)

 pl.Play()

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file aiff: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End


Conversione audio con il plugin "decodebin"

Usando il plugin "decodebin" è possibile convertire qualsiasi formato audio in un altro desiderato.
Mostriamo un esempio, nel quale sarà convertito un file audio "OGG" in un file audio "WAV", avente il seguente formato: frequenza di campionamento = 44100, risoluzione = 16 bit, canali = 2. 

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, dcb, con, flt, wav, snk As MediaControl

 fileaudio = "/percorso/del/file.ogg"

 pl = New MediaPipeline As "PLine"

 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio

 dcb = New MediaControl(pl, "decodebin")
 con = New MediaControl(pl, "audioconvert")
 flt = New MediaFilter(pl, "audio/x-raw, format=S16LE, rate=44100, channels=2, depth=16")
 wav = New MediaControl(pl, "wavenc")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"
 
 src.LinkTo(dcb)
 dcb.LinkLaterTo(con)
 con.LinkTo(flt)
 flt.LinkTo(wav)
 wav.LinkTo(snk)

 pl.Play()

 Print "Durata del file ogg: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
   Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True
  
End

Se si vuole convertire in un file avente caratteristiche (frequenza di campionamento, numero dei canali, risoluzione in bit) dei propri campioni audio diverse da quelle del file originario, da convertire, allora si dovranno usare l'elemento "audioresample" e la Classe MediaFilter.

Mostriamo un esempio pratico, nel quale si convertirà un file MP3 in un file WAV avente frequenza di campionamento uguale a 22050 hertz e risoluzione a 8 bit: 

Private bo As Boolean


Public Sub Main()

 Dim fileaudio As String
 Dim pl As MediaPipeline
 Dim src, dcb, con, res, flt, wav, snk As MediaControl

 fileaudio = "/percorso/del/file.mp3"

 pl = New MediaPipeline As "PLine"
  
 src = New MediaControl(pl, "filesrc")
 src["location"] = fileaudio
 dcb = New MediaControl(pl, "decodebin")
 con = New MediaControl(pl, "audioconvert")
 res = New MediaControl(pl, "audioresample") ' Consente di modificare le caratteristiche del file audio
 flt = New MediaFilter(pl, "audio/x-raw,rate=22050,format=U8")
 wav = New MediaFilter(pl, "wavenc")
 snk = New MediaControl(pl, "filesink")
 snk["location"] = "/tmp" &/ File.BaseName(fileaudio) & ".wav"

 src.LinkTo(dcb)
 dcb.LinkLaterTo(con)
 con.LinkTo(res)
 res.LinkTo(flt)
 flt.LinkTo(wav)
 wav.LinkTo(snk)
 
 pl.play

 While pl.Duration < 1
   Wait 0.01
 Wend
 Print "Durata del file mp3: "; Time(0, 0, 0, pl.Duration * 1000)
 Repeat
 Write "\r\e[0mTempo trascorso:     \e[31m" & Time(0, 0, 0, pl.Position * 1000)
   Wait 0.01
 Until bo

 pl.Stop
 pl.Close

 Print "\n\e[0mConversione terminata !"

End


Public Sub PLine_End() ' Questo Evento viene sollevato, quando la conversione è terminata

 bo = True

End
Estratto da "https://www.gambas-it.org/wiki/index.php?title=Convertire_i_formati_audio_mediante_il_Componente_gb.media&oldid=36277"