[MPlayer-users] ffmpeg problems, old and new

Michael Niedermayer michaelni at gmx.at
Thu Jul 25 22:38:01 CEST 2002


Hi

On Thursday 25 July 2002 15:13, Anssi Saari wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>
> I have three problem files, one old and two new.
>
> 1. brightness_problem.avi, in mplayerhq.hu incoming/!checked.
>    I uploaded this a long time ago.
>    Brightness jumps at keyframe change with ffmpeg (ffdivx), but it's
>    fine with win32 codecs. I remember this problem was fixed
>    at some point, put now it's back?!? Or I'm crazy...
just fixed in ffmpeg CVS

>
> 2. brightness_jump_with_ffodivx.avi, in mplayerhq.hu incoming.
>    Same problem as above, but with ffodivx.
imho encoder bug, i checked it against the reference IDCT and some older MC 
code both showed the same brightness problem so i guess its an encoder bug, 
do u perhaps know (or can find out) which encoder (and version) was used?

>
> 3. colorbleed_with_ffmpeg.avi, in mplayerhq.hu incoming.
>    This has some color bleeding (if that's the right term) with ffdivx.
>    The effect is visible in the lower right corner starting at 9 seconds
>    into the clip.  There is some stuff on a table, the camera moves and
>    the dark table top takes on a lighter color from one of the things on
>    it, until next keyframe where it resets to correct color. It's not a
>    very good example, I've seen others recently but of course I don't
>    remember where... This problem also doesn't happen with win32 codec.
just fixed in ffmpeg CVS
[...]

Michael




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