mp4mux complains about missing PTS

[Florian Echtler]

Sure, will do! Which is the right place for reporting, though? Is it 
https://gitlab.freedesktop.org/groups/gstreamer/-/issues ?

Thanks and best, Florian

On 18.04.23 13:45, Sebastian Dröge wrote:
> On Tue, 2023-04-18 at 13:42 +0200, Florian Echtler via gstreamer-devel wrote:
>>
>> I'm trying to record multiple H.264 and Opus streams to a MP4 file. However,
>> there is apparently some sort of race condition going on, because in roughly 8
>> out of 10 attempts, the pipeline fails with the following error and an EOS:
>>
>> gst-stream-error-quark: Could not multiplex stream. (10):
>> ../gst/isomp4/gstqtmux.c(5402): gst_qt_mux_add_buffer ():
>> /GstPipeline:pipeline0/GstBin:bin_file_sink/GstMP4Mux:mux:
>> Buffer has no PTS.
>>
>> In the other 20% of cases, the pipeline starts and the resulting MP4 file
>> contains all the streams, correctly synchronized and playable. I also tried with
>> qtmux instead of mp4mux, but got the same results.
>>
>> I'm attaching the dot graph for the failure case; the dot graph for a successful
>> run looks exactly identical, with the only difference being that the filesink
>> doesn't flag EOS.
>>
>> Side question: even if everything works, the resulting MP4 file is not seekable.
>> Is there a straightforward fix for that?
> 
> Can you create an issue with this with a way to reproduce it?
> Most likely this is one of the known h264parse/baseparse PTS handling issues though.
> 
> -- 
> 
> Sebastian Dröge, Centricular Ltd · https://www.centricular.com 
> <https://www.centricular.com/>

-- 
SENT FROM MY DEC VT50 TERMINAL

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