[Ffmpeg-devel] trouble with h264.c

[Måns Rullgård]

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