Re: [gst-devel] Delayed linking

[Jason G. D. <jd...@ja...>]

David,

You need to link the video pad in a handler for the 'pad-added' signal
(emitted by your demux element).

I've attached an example of doing this with vorbis from an ogg file.
Look at the on_pad_added() method.

Cheers,
Jason

David Johnson wrote:
> Hi all,
> 
> I'm trying to setup a pipeline in Python to playback a video file.
> The problem I have is that the demux plugin (I'm testing with both flutsdemux 
> and ffdemux_mpegts, both show the same behaviour) doesn't have a video pad 
> until some time after playback has started.
> 
> Viewing debug output from gst-launch, it initially fails to link the demux to 
> mpeg2dec due to the lack of a video pad, but later retries once the video pad 
> is added - how can I mirror this behaviour in Python?
> 
> For completeness, the pipeline I'm using is:
> gst-launch filesrc location=foo.mpeg ! ffdemux_mpegts ! mpeg2dec ! xvimagesink
> 
> I've tried everything I can think of to make this work, but can't figure it 
> out or find any examples (even an example in C would be useful). Any help 
> would be much appreciated!
> 
> Thanks,
> David.
> 
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