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

[Carl Eugen Hoyos]

Jonathan Isom <jeisom <at> gmail.com> writes:

> Attached is 2 logs. 1 is from a ATSC mpeg2 stream, the other a h264
> mkv video.  Fresh build from today from a live ebuild on gentoo that
> uses no patches.

> Problem affects mplayer and vlc as well(system ffmpeg).

(I don't think I understand this sentence.)

> command line used:
> ffmpeg -i test.mkv -t 60 -s 720x480 -target ntsc-dvd -b:v 8000000 -b:a
> 224000 -c:v mpeg2video -c:a ac3 test.mpeg
> ffmpeg -i 3031_20120927210000.mpg -t 60 -s 720x480 -target ntsc-dvd
> -b:v 8000000 -b:a 224000 -c:v mpeg2video -c:a ac3 test.mpeg

(More unrelated comments: 
Why did you compress the output:
To make reading it more difficult?
Some of the build options look _very_ strange, consider 
using ./configure && make or at least something more 
similar.
-s 720x480 -c:v mpeg2video -c:a ac3 look unneeded)

I can reproduce the problem here, if I haven't opened a 
ticket in the next days please remind me.

If you want to help, consider uploading a sample.

Thank you, Carl Eugen