[Gambas-user] media component syntax and the gstreamer filesink

[Dominique Michel]

Le Sat, 15 Feb 2014 02:49:14 +0100,
Benoît Minisini <gambas at ...1...> a écrit :

> Le 15/02/2014 02:23, Dominique Michel a écrit :
> >>
> >> That solve the duration issue with mplayer and alsaplayer:
> >>      $hAudio["is-live"] = "1"
> >> but not the 0 length file issue.
> >
> > That solve it only partly. Both players play it with the wanted
> > duration, but they display a file length of 0 seconde.
> >
> > I get the same problem with the following command line:
> > gst-launch-1.0 audiotestsrc is-live=1 ! flacenc ! filesink
> > location=generated.flac
> >
> > But I get the correct duration display with:
> > gst-launch-1.0 -e audiotestsrc is-live=1 ! flacenc ! filesink
> > location=generated.flac
> 
> I think I can add the same trick to gb.media. I will tell you.

Thank you.

> 
> >
> > Another issue is that ideally, I want to be able to use such a
> > pipeline with gambas:
> >
> > gst-launch-1.0 -e audiotestsrc is-live=1 !
> > audio/x-raw,channels=2,rate=48000 ! flacenc ! filesink
> > location=generated.flac
> >
> > and if I try something like:
> >
> >    $hAudio["is-live"] = "1"
> >    $hRaw = New MediaControl($hPlayer, "audio/x-raw")
> >    $hConv = New MediaControl($hPlayer, "flacenc")
> >    $hOutput["location"] = "wavegenerator.flac"
> >    $hOutput["append"] = "1"
> >    $hAudio.LinkTo($hRaw)
> >    $hRaw.LinkTo($hConv)
> >    $hConv.LinkTo($hOutput)
> >
> > it fail at $hRaw = New MediaControl($hPlayer, "audio/x-raw")
> >
> > How I can get it to work?
> 
> 'audio/x-raw' is actually a special syntax for the 'capsfilter' 
> GStreamer plugin.
> 
> It is handled by the MediaFilter object, not just the MediaControl
> object:
> 
> $hRaw = New MediaFilter($hPlayer, "audio/x-raw,channels=2,rate=48000")
> 
> That should work. You will tell me.
> 

Gambas fail with this. The following work but do nothing:

$hRaw = New MediaFilter($hPlayer)
$hRaw["caps"] = "audio/x-raw, channels=2, rate=48000"

Dominique