[FFmpeg-devel] [PATCH v9] lavf: palettized QuickTime video in Matroska

Mats Peterson matsp888 at yahoo.com
Mon Dec 28 03:27:55 CET 2015

On 12/28/2015 03:21 AM, Mats Peterson wrote:
> On 12/28/2015 03:16 AM, Michael Niedermayer wrote:
>> On Mon, Dec 28, 2015 at 12:24:10AM +0000, Carl Eugen Hoyos wrote:
>>> Mats Peterson <matsp888-at-yahoo.com <at> ffmpeg.org> writes:
>>>> +        memcpy(st->codec->extradata, matroska->palette,
>>>> +                AVPALETTE_SIZE);
>>> As said, please remove this,
>>> you must not fix MPlayer
>>> issues in FFmpeg.
>> this is true but iam not sure if this is really "just" a mplayer
>> issue.
>> If there is a global palette, then it is not unreasonable that it
>> is placed in a stream global place. This is especially true if not
>> all packets are copied and the palette from the first packet is
>> lost as a result.
>> either way, the commit message for this part just points at mplayer,
>> which isnt really good for a description of a "bug fix" in libavformat
>> Patch splited in move and matroska part
>> i removed this memcpy() for now from what i commited as there is
>> clearly no consenus on it.
> Michael, the concensus is that MPlayer won't work without having the
> palette in extradata, since it uses the extradata as the palette when it
> adds ANOTHER palette side data packet AFTER the one added in
> matroskadec.c. I'm not making this up. Carl is of course right in his
> statement that we shouldn't fix MPlayer issues in FFmpeg, but perhaps it
> could be a "quick fix" until the MPlayer developers wake up?
> Mats
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel

Especially since MPlayer is such an evident use case of FFmpeg. It even 
includes it inside its own source code.


Mats Peterson

More information about the ffmpeg-devel mailing list