playing and parsing mpeg2ts file

Duchassin Frederic duchassin at
Fri Mar 29 11:11:43 UTC 2019

Hi Tim,

I played with the size of the queue in front of tsparse but not during 

In all case, My dot file is created later after the pipeline was playing.

You're right : my main problem is that decodebin is not completely 
linked (no audiodecoder beepdec linked) and i don't know why.

My though were like you : that's why I increase the tsparsequeue but 
without any success : no video+audio.

Just one test I have make  : attached the same pipeline but i change the 
order of the link : i begin by linking decodebin branch ,.... and it 
works... i really understand nothing !!!!



Le 29/03/2019 à 11:35, Tim Müller a écrit :
> On Fri, 2019-03-29 at 11:00 +0100, Duchassin Frederic wrote:
> Hi Frederic,
> Not entirely sure what's going on here. You dot file and mail says that
> the queue in front of the tsparse has 201 buffers and max-size-
> buffers=2000 (two thousand).
> The dot file also doesn't show links from decodebin to your audio/video
> sink branches. Unclear if that's because of the timing of the dot file
> snapshot or because that's your problem (then the audio/video sinks
> never get any data and the pipeline won't preroll). If the decodebin
> was unliked I would suspect the tsparse queue to be fuller though.
> It's a bit suspicious that the queue in front of the tsparse is at 201
> buffers, which is just above the default max-size-buffers limit of 200.
> Did you increase the max-size-buffers limit after pipeline startup?
> So my best guess is that the queue in front of the tsparse runs full,
> and then blocks the filesrc ! tee upstream, and then decodebin etc.
> don't get more data and can't finish their preroll and the pipeline is
> stuck.
> GST_DEBUG=queue:6 might help confirm whether this is the case or not.
> Cheers
>   Tim
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