qtdemux bug?

[Demon Deng]

Hi,  I have got some problems when using qtdemux.

Pipeline "filesrc location=xxx.mp4 ! qtdemux name=demux demux.audio_00 ! queue ! filesink location=a.aac demux.video_00 ! queue ! filesink location=a.h264" works well, but "filesrc location=xxx.mp4 ! qtdemux name=demux demux.audio_00 ! filesink location=a.aac demux.video_00 ! filesink location=a.h264" does not work.

It seems to be a dead lock in basesink which is waiting for a play event.

Does it necessary to add a queue in pipeline when demuxing?

Thanks.

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[Tim-Philipp Müller-2]

On Tue, 2009-09-29 at 11:36 +0800, dxssx wrote:

> Pipeline "filesrc location=xxx.mp4 ! qtdemux name=demux
> demux.audio_00 ! queue ! filesink location=a.aac demux.video_00 !
> queue ! filesink location=a.h264" works well, but "filesrc
> location=xxx.mp4 ! qtdemux name=demux demux.audio_00 ! filesink
> location=a.aac demux.video_00 ! filesink location=a.h264" does not
> work.
>
>
> It seems to be a dead lock in basesink which is waiting for a play
> event.
>
>
> Does it necessary to add a queue in pipeline when demuxing?

Yes, you need to add queues, otherwise the pipeline can't preroll
because the first sink to get data will block and control won't be given
back to qtdemux to push data to the other sink (which will then wait for
data forever and never preroll).

Cheers
 -Tim

>


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[Demon Deng]

thanks

2009/9/29 Tim-Philipp Müller <[hidden email]>

On Tue, 2009-09-29 at 11:36 +0800, dxssx wrote:

> Pipeline "filesrc location=xxx.mp4 ! qtdemux name=demux
> demux.audio_00 ! queue ! filesink location=a.aac demux.video_00 !
> queue ! filesink location=a.h264" works well, but "filesrc
> location=xxx.mp4 ! qtdemux name=demux demux.audio_00 ! filesink
> location=a.aac demux.video_00 ! filesink location=a.h264" does not
> work.
>
>
> It seems to be a dead lock in basesink which is waiting for a play
> event.
>
>
> Does it necessary to add a queue in pipeline when demuxing?

Yes, you need to add queues, otherwise the pipeline can't preroll
because the first sink to get data will block and control won't be given
back to qtdemux to push data to the other sink (which will then wait for
data forever and never preroll).

Cheers
 -Tim

>


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