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Re: [MPlayer-dev-eng] Support for xxpc chunks in AVI




Mats Peterson <matsp888-at-yahoo.com@xxxxxxxxxx> skrev: (8 mars 2016 21:37:43 CET)
>"Reimar Döffinger" <Reimar.Doeffinger@xxxxxx> skrev: (8 mars 2016
>21:25:46 CET)
>>On Tue, Mar 08, 2016 at 09:13:49PM +0100, Mats Peterson wrote:
>>> Mats Peterson <matsp888-at-yahoo.com@xxxxxxxxxx> skrev: (8 mars 2016
>>21:05:38 CET)
>>> >"Reimar Döffinger" <Reimar.Doeffinger@xxxxxx> skrev: (8 mars 2016
>>> >20:28:02 CET)
>>> >>On Tue, Mar 08, 2016 at 07:46:45AM +0100, Mats Peterson wrote:
>>> >>> Since you've been so concerned about the whole xxpc chunk issue,
>>> >>Reimar,
>>> >>> when will we actually see support for xxpc chunks in the AVI
>>demuxer
>>> >>in
>>> >>> MPlayer?
>>> >>
>>> >>The only thing I am concerned about is that either things are
>>> >>implemented properly, or if that's not considered worth it
>>> >>it's a conscious decision and documented, at the very
>>> >>least in FFmpeg.
>>> >>I have no intention to add new features to our AVI demuxer.
>>> >>Whether maybe FFmpeg's should be the default or if it's
>>> >>easy enough to print a messages suggesting to use FFmpeg's
>>> >>manually if such junks are encountered is a different
>>> >>question though.
>>> >
>>> >So am I, regarding things being implemented properly. The best
>thing
>>> >would probably be to index the xxpc "junks", as you call it,
>instead
>>of
>>> >adding the palette to every keyframe, which would otherwise be
>>needed.
>>> >Also, to have the demuxer use the right logic to set the correct
>>> >palette at a certain timestamp based on the xxpc indices.
>>> 
>>> Or "xxpc index entries", rather.
>>
>>I am not aware that the AVI standard contains such a thing?
>>That you could invent a AVI-like format with such special
>>support is certainly true, but it doesn't help if you are
>>writing AVI files.
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>
>I wouldn't invent something non-standard. Google "AVI RIFF File
>Reference". Then again, I understand your intention of not adding it to
>MPlayer's muxer/demuxer, even more so after compn's comment.
>
>Mats
>-- 
>Mats Peterson
>http://matsp888.no-ip.org/~mats/
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The demuxer support for xxpc chunks in FFmpeg has been there for quite a while, for the record.
-- 
Mats Peterson
http://matsp888.no-ip.org/~mats/
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