[gst-devel] gnonlin and ffmpeg encoder problems

[Lane Brooks]

I have a gnonlin frontend that works fine when feeding an autovideosink 
and the x264enc encoder. However, when I switch the encoder to a 
ffenc_mpeg4, it quits encoding after the first source and starting 
spewing out "Invalid timestamp" errors.

I have a simple self-contained test that shows the problem that I posted 
to http://pastebin.com/D8UgAHqt

The script creates two gnlsources that encapsulate two videotestsrc with 
different patterns that are arranged to play serially. The encapsulating 
gnlcomposition feeds a ffenc_mpeg element. Only the first gnlsource gets 
encoded in the resulting test.mp4 file. If you switch the script to use 
the x264enc or the autovideosink, however, it works fine. The problem 
also occurs with the mpeg2enc encoder and all the other ffmpeg encoders 
that I have tried.

The script is completely self contained and I would be curious if others 
can download it and see the same behavior. Am I doing something wrong or 
is there an incompatibility between gnonlin and ffmpeg encoders.

Thanks,
Lane