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

[Jonathan Isom]

On Fri, Sep 28, 2012 at 5:08 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> 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.

Hi.

Just updated to commit 0ed023275f79d6dd7b1be832da27175f788b8e4d and it
still is present. I haven't seen a ticket opened. Every video I have
thrown at it demonstrates the problem.

Thanks

Jonathan

> If you want to help, consider uploading a sample.
>
> Thank you, Carl Eugen
>
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