[FFmpeg-devel] [PATCH 1/2] lavf/avienc: Simplify palette handling

Reimar Döffinger Reimar.Doeffinger at gmx.de
Sat Feb 27 20:44:32 CET 2016


On Sat, Feb 27, 2016 at 07:52:52PM +0100, Mats Peterson wrote:
> On 02/27/2016 07:46 PM, Reimar Döffinger wrote:
> >On Sat, Feb 27, 2016 at 07:40:44PM +0100, Mats Peterson wrote:
> >>On 02/27/2016 07:18 PM, Reimar Döffinger wrote:
> >>>That's not what e.g. the matroska demuxer produces, so stream
> >>>copying with some generic remuxing example I am really sure that is
> >>>NOT how the packets come in.
> >>>
> >>
> >>Stream copying of raw palettized data seldom works well, due to different
> >>strides of AVI (4-byte aligned), QuickTime (2-byte aligned) and nut
> >>(unnaligned).
> >
> >"Seldom"? That's only an issue (for 8 bpp) if the width
> >is not a multiple of 4.
> 
> It's an issue for 1 bpp data as well.

Not the parsing I meant :)
For 8bpp it can only happen if the width is not a multiple of 4.
For 1bpp it can only happen if the width is not a multiple of 16
(which is quite a bit more likely and thus I didn't want to use that one
as example).


More information about the ffmpeg-devel mailing list