[Ffmpeg-devel] trouble with h264.c

Måns Rullgård mru
Fri May 13 17:04:56 CEST 2005

Guillaume POIRIER <poirierg at gmail.com> writes:

> Hi,
> On 5/13/05, M?ns Rullg?rd <mru at inprovide.com> wrote:
>> Scott Treude <scott at niceshoes.com> writes:
>> > Hello,
>> >
>> > I'm trying to convert an h264 quicktime to a series of ppm files and
>> > I'm receiving the following error:
>> >
>> > ffmpeg: h264.c:2316: mc_dir_part: Assertion `pic->data[0]' failed.
>> >
>> > The command I'm using is:
>> > /usr/local/bin/ffmpeg -ss 100  -t .2 -i myMovie.mov test%d.ppm
>> >
>> > It seems to work fine without the -ss; so is seeking a problem with h264?
>> This is a know problem, at least to me.  Unfortunately, I'm not sure
>> how to fix it.  The problem is that a reference picture used by the
>> picture being decoded is unavailable, since it was before the point
>> you started decoding at.
>> Michael, Loren, what should we do about this?  It used to work, a long
>> time ago.  IIRC, it broke around the time B-frame support was added.
> Hummm... not so sure. I encoded a movie no more than 2-3 weeks ago
> that played fine, but now it triggers that assertion error.

This movie, does it always trigger that error?  If so, we're not
talking about the same bug.

> AFAIR, B-frame support is much older.

I've been seeing that error when seeking for several months.  Search
the archives for my report.

M?ns Rullg?rd
mru at inprovide.com

More information about the ffmpeg-devel mailing list