[Ffmpeg-devel] [PATCH] xan_dpcm in MPlayer + libavformat

Michael Niedermayer michaelni
Sat Nov 18 19:02:23 CET 2006


Hi

On Sat, Nov 18, 2006 at 06:58:25PM +0100, Michael Niedermayer wrote:
> Hi
> 
> On Sat, Nov 18, 2006 at 06:40:56PM +0100, Diego Biurrun wrote:
> > On Sat, Nov 18, 2006 at 03:34:08PM +0100, Michael Niedermayer wrote:
> > > 
> > > On Sat, Nov 18, 2006 at 01:58:54PM +0100, Diego Biurrun wrote:
> > > > On Sat, Nov 18, 2006 at 03:20:24AM +0100, Michael Niedermayer wrote:
> > > > > 
> > > > > On Fri, Nov 17, 2006 at 05:17:58PM -0800, Mike Melanson wrote:
> > > > > > 
> > > > > > Right. The people (Origin) that developed this format never applied with 
> > > > > > Microsoft for a specific codec ID; they didn't mean for these files to 
> > > > > > be played in general media players. They have codec ID 0x0001 (usually 
> > > > > > reserved for PCM). There is data elsewhere in the AVI file indicating 
> > > > > > 'Axan'. All written up here:
> > > > > 
> > > > > AVCodecContext.stream_codec_tag i assume, and i would appreciate it if
> > > > > someone would remove this dirty "if video is xan then audio is so too"
> > > > > hack and instead add Axan to riff.c and check both stream_codec_id and
> > > > > codec_id
> > > > 
> > > > Dunno if I understood you correctly (probably not), but here is a patch
> > > > that contains the hack a bit more based on your suggestion to check
> > > > stream_codec_tag.  It's better than it was before at least.
> > > 
> > > yes, its better, apply it
> > 
> > Applied with a slightly better comment.
> > 
> > I'll have to note here that it was a xine developer that introduced this
> > hack and an MPlayer developer that fixed it.  Our reputation for hacks
> > is entirely undeserved ;-p
> > 
> > > > BTW, some of the comments in that file seem misplaced.  Maybe someone
> > > 
> > > yes
> > 
> > So who can correct them? :-)
> 
> hmmmmmmmm
> you :)))))

hint: exchanging them seems to be correct

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In the past you could go to a library and read, borrow or copy any book
Today you'd get arrested for mere telling someone where the library is




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