flutsdemux src pads

[Dan Taylor-2]

I have been able to play ATSC video with dvbsrc, flutsdemux, ...
using a gst-launch command line (within a shell script that parses
and mplayer channels.conf):

gst-launch --gst-debug-no-color dvbsrc modulation="QAM 256"
frequency=${FREQ} !
 flutsdemux name=ts  program-number=${PROGRAM}
 ts.audio_${HAID} ! decodebin ! queue max-size-buffers=0 max-size-time=0
!
  audioconvert ! alsasink
 ts.video_${HVID} ! queue max-size-buffers=0 max-size-time=0 ! mpeg2dec
!
  queue max-size-buffers=0 max-size-time=0 ! videoscale method=0 !
  video/x-raw-yuv, height=608 ! queue max-size-buffers=0 max-size-time=0
!
  ffmpegcolorspace ! xvimagesink force-aspect-ratio=true

If I do not specify the audio and video PIDs, I get nothing.

I am now trying to replicate the functionality in a "C" program.  The
problem is that I do not have the audio_%04x and video_%04x pads until
the stream begins to decode.  Unlink decodebin, which emits the
"new-decoded-pad" signal, flutsdemux has no way to tell me that it
has created the "sometimes" pads.

Could someone point me to an example or reference that describes
dynamically
linking to the src pads of flutsdemux?


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[Tim-Philipp Müller-2]

On Thu, 2008-12-11 at 15:36 -0800, Dan Taylor wrote:

> (...)
> I am now trying to replicate the functionality in a "C" program.  The
> problem is that I do not have the audio_%04x and video_%04x pads until
> the stream begins to decode.  Unlink decodebin, which emits the
> "new-decoded-pad" signal, flutsdemux has no way to tell me that it
> has created the "sometimes" pads.

It should emit "pad-added" signals, see:

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html#GstElement-pad-added


(gst-inspect doesn't list the standard GObject, GstObject and GstElement
properties and signals, only those added by subclasses of GstElement).

Btw, flutsdemux has been moved to gst-plugins-bad recently and is now
superseded by the new 'mpegtsdemux' there.

Cheers
 -Tim



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[Dan Taylor-2]

Thank you.  That was exactly what I was missing.

> -----Original Message-----
> From: Tim-Philipp Müller [mailto:[hidden email]]
> Sent: Friday, December 12, 2008 3:43 AM
> To: [hidden email]
> Subject: Re: [gst-devel] flutsdemux src pads
>
> On Thu, 2008-12-11 at 15:36 -0800, Dan Taylor wrote:
>
> > (...)
> > I am now trying to replicate the functionality in a "C"
> program.  The
> > problem is that I do not have the audio_%04x and video_%04x
> pads until
> > the stream begins to decode.  Unlink decodebin, which emits the
> > "new-decoded-pad" signal, flutsdemux has no way to tell me that it
> > has created the "sometimes" pads.
>
> It should emit "pad-added" signals, see:
>
> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstre
> amer/html/GstElement.html#GstElement-pad-added
>
>
> (gst-inspect doesn't list the standard GObject, GstObject and
> GstElement
> properties and signals, only those added by subclasses of GstElement).
>
> Btw, flutsdemux has been moved to gst-plugins-bad recently and is now
> superseded by the new 'mpegtsdemux' there.
>
> Cheers
>  -Tim
>
>
>
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>

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