[FFmpeg-user] Encoding to mpeg2video results in buffer underflows

Jonathan Isom jeisom at gmail.com
Sun Dec 30 18:26:19 CET 2012

On Sunday, December 30, 2012, Carl Eugen Hoyos wrote:

> Jonathan Isom <jeisom <at> gmail.com> writes:
> >  Just tested and it appears to still be there with the latest git.
> >  Posted to upload.ffmpeg.org/incoming "mpeg2video_underrun.txt" &
> >  "mpeg2video_underrun.mp4".
> The command lines contain "-qmin 1 -qmax 1 -target ntsc-dvd -c:a mp3"
> Could you explain this combination?
> (I thought mp3 is not supported for DVD's and I don't think
> you can / should combine constant quantiser with a target -
> how is the bitrate limitation supposed to work with this
> command line?)
> Sorry if I miss something, I did not read through the
> whole old thread again.

 "ffmpeg -i mpeg2video_underrun.mp4 -b:v 8000000 -qmin 1 -qmax 5  -c:v
mpeg2video -c:a ac3 -f mpeg mpeg2video_underrun.mpg"

This produces the same errors. Just takes longer to occur.  Mp3 isn't
supported as you say with DVDs. The audio choice doesn't seem to matter for
this error.



> Thank you, Carl Eugen
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