Gambas media (gstremer) help con il metodo "linkLaterTo"

[allegfede]

per "mimare" con il componente gb.media il comportamento di questa pipeline funzionante (da shell):

Codice: [Seleziona]

gst-launch-1.0 uridecodebin uri=file:///home/v1p3r/video.mp4 name=decode decode. ! interlace field-pattern=1 ! videoconvert ! video/x-raw,format=UYVY ! videoscale ! video/x-raw,width=720,height=576 ! videorate ! video/x-raw,framerate=25/1 ! decklinkvideosink mode=3 decode. ! audioconvert ! decklinkaudiosink

ho pensato di usare questo codice (un inaspettato aiuto dal forum tedeco di gambas:https://www.gambas-club.de/viewtopic.php?t=5438):

Codice: [Seleziona]

' Gambas class file

'typedef enum
' {
'   GST_INTERLACE_PATTERN_1_1,
'   GST_INTERLACE_PATTERN_2_2,
'   GST_INTERLACE_PATTERN_2_3,
'   GST_INTERLACE_PATTERN_2_3_3_2,
'   GST_INTERLACE_PATTERN_EURO
' }GstInterlacePattern;

Public Sub ToggleButton1_Click()
Dim pl As MediaPipeline
Dim src As MediaControl
Dim interlace As MediaControl
Dim videoconvert, videoscale, videorate, audioconvert As MediaFilter
Dim videosnk, audiosnk As MediaControl

 
 pl = New MediaPipeline 
  
 src = New MediaControl(pl, "uridecodebin")
 src["uri"] = "file:///home/v1p3r/video.mp4"

 interlace = New MediaControl(pl, "interlace")
 interlace["field-pattern"] = "0"
 
 videoconvert = New MediaFilter(pl, "video/x-raw,format=UYVY")
 
 videoscale = New MediaFilter(pl, "video/x-raw,width=720,height=576")
 
 videorate = New MediaFilter(pl, "video/x-raw,framerate=25/1")
 
 audioconvert = New MediaFilter(pl, "audio/x-raw,format=S16LE,channels=2")
 
 videosnk = New MediaControl(pl, "decklinkvideosink")
 videosnk["mode"] = 3
 
 audiosnk = New MediaControl(pl, "decklinkaudiosink")
  
 src.LinkLaterTo(interlace)
 interlace.LinkTo(videoconvert)
 videoconvert.LinkTo(videoscale)
 videoscale.LinkTo(videorate)
 videorate.LinkTo(videosnk)
 
 src.LinkLaterTo(audioconvert)
 audioconvert.LinkTo(audiosnk)

  
 pl.Play()
 
 ToggleButton1.Enabled = False
 
 While pl.Duration > pl.Position
   Write "\rTempo: " & Date(0, 0, 0, 0, 0, 0, pl.Position * 1000)
   Wait 0.001
 Wend
  
 pl.Stop()
 pl.Close()

 ToggleButton1.Enabled = True

End

ma, come al solito, al pl.play() ottengo un misero "cannot set status" .....

idee?

[vuott]

La stringa, che dovrebbe funzionare, lanciata da terminale mi dà questo errore:

libDeckLinkAPI.so: cannot open shared object file: No such file or directory
ERROR: Pipeline doesn't want to pause.
ERROR: from element /GstPipeline:pipeline0/GstDecklinkAudioSink:decklinkaudiosink0: GStreamer error: state change failed and some element failed to post a proper error message with the reason for the failure.
Additional debug info:
gstbasesink.c(5265): gst_base_sink_change_state (): /GstPipeline:pipeline0/GstDecklinkAudioSink:decklinkaudiosink0:
Failed to start

[allegfede]

suppongo tu non abbia una scheda decklink e relativi driver montati ....

provo a modificare il comando con un sink differente, tipo questo:
gst-launch-1.0 uridecodebin uri=file:///home/user/path_del_file.mp4 name=decode decode. ! interlace field-pattern=1 ! videoconvert ! video/x-raw,format=UYVY ! videoscale ! video/x-raw,width=720,height=576 ! videorate ! video/x-raw,framerate=25/1 ! autovideosink decode. ! audioconvert ! autoaudiosink