Re: Unsupported codecs in linux.

On 2004.07.24 04:32, Mike Melanson wrote:
> On Sat, 24 Jul 2004, James Courtier-Dutton wrote:
> 
> > Is there a list anywhere listing which codecs have not yet been
> reverse
> > engineered so that they can work in open source software.
> >
> > I have some.
> > 1) .swf files with video/radio links in them.
> > 2) dvd audio.
more unknows formats are truecast 7 (i don't think it's supported yet),  
Microsoft asf over rtsp (there are some docs, don't know if any player  
implemented it)
> >
> > Are there any more?
> 
> 	I do not know of any such list but I will help to assemble
> one. As
> for DVD audio, that actually breaks down into 2 pieces:
> 
> * CPPM, DRM similar in concept to DVD video CSS
> * Meridian Lossless Packing, the audio coding algorithm
> 
> Off the top of my head:
> 
> Quicktime side:
> * QDesign audio v1 & v2 (QDMC & QDM2)
> * Qualcomm PureVoice (Qclp)
> * ZyGo video (ZyGo), only known to occur in one file
> 
> Microsoft side:
> * WMV8: one feature ("j-frames") not completely RE'd yet
> * WMV9
> * WMA3
WMA2 also have some implementation errors, there are unplayable samples
Windows Media Voice (wmaspdmo.dll, format 0x10), Windows screen codec  
(MSS1)
> 
> On2 side:
> * VP4
> * VP5
> * VP6 et al. (VP60, VP61, VP62)
There is also On2 audio codec, AVC (Audio for Video Codec)
> 
> Real side:
> I am no expert on this technology and will need some help to fill in
> the
> gaps... I know that audio codecs 'sipr' and 'cook' are still under
> wraps
Cook (RA8, afaik work in progress on it), SIPRO, ATRAC on audio side.  
There is also a new cook5.1 and a lossless compressor in realplayer10
RV30 (H.263 based), RV40 video codecs. realvideo10 is just rv40, the  
only difference is in the encoder
> 
> Finally, browsing the fourcc.org list and looking for familiar codecs
> that
> have not been RE'd:
> * 3ivx (3IV1, 3IV2)
newer 3ivx is mp4, don't know about the firs 3ivx codec
> * Intel Indeo 2.x
> * Intel Indeo 4.x
> * Intel Indeo 5.x
> * Motion Pixels v1 & v2 (MVI1 & MVI2)
> * TechSmith (TSCC)
Intel Indeo Audio 2, Woxware, truespeech, and others

Then we have a lot of less known formats, like formats generated by  
various capture cards, and a lot of obscure formats noone have ever met  
in the wild (there is only one sample on mphq, uploaded by the same  
person who upladed  the binary codec).

There are also all the wavelet based codecs (morgan, lead, ...) and the  
jpeg200 based codecs.

If you need a complete list i can try to compile it, but to get an idea  
have a look at codecs.conf in MPlayer source tree.

> 
> Oh, and there is also RadGameTools' Smacker and Bink technologies  
> that
> would be desirable, especially since there are literally hundreds of
> games
> out there that use them. It is worth noting that RGT is still
> interested
> in sticking up for this IP as evidenced by them telling the Media
> Player
> Classic developers that they were not allowed to interface to their
> DLLs
> to play .smk and .bik files.
> 
> More on the game/fringe side:
> * Eidos' Escape codec, used in Tomb Raider games and others
> * KMVC, used in the Worms family of games
> * Xxan, Origin codec that I *will* finish figuring out one day
> 
> --
> 	-Mike Melanson
Ciao,
 Roberto




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