[MPlayer-dev-eng] Questions About Audio Decoding

Alex Beregszaszi alex at naxine.org
Fri Dec 21 21:23:19 CET 2001


Hi,

Can you upload a .mov including this 24bit rle or something else that uses
other value than 16bits?

I will fix the mov demuxer.

--
alex


On Fri, Dec 21, 2001 at 09:17:41PM +0100, Alex Beregszaszi wrote:
> On Fri, Dec 21, 2001 at 01:10:15PM -0700, Mike Melanson wrote:
> > On Fri, 21 Dec 2001, Alex Beregszaszi wrote:
> > 
> > > are you willing to add only apple variant of rle? (i mean 4bit msrle variant
> > > can be added too)
> > > have you got some samples? can you upload it?
> > 
> > 	What other flavors are there besides Apple and MS? The MS flavor
> > is already covered by the adapted XAnim code. Doesn't it handle the 4-bit
> > variant? Oh...I just looked at the code and saw that it's not covered.
> > Okay, I'll try to add that, too. Should I rewrite the MS-RLE8 decoder as
> > well, in order to help reduce the volume of that weird XAnim code in the
> > codebase?
> 
> 4bit variant isn't handled. i think writing a new rle decoder would be cool
> (to reduce the xanim codebase), but first ask arpi about this :)
> Hmm, have you completed the yuv outputs for the decoder you've written?
> RLE decoder should be written with YUV output support, whit this feature
> it would eat the xanim code :)
> 
> Also, what's your time order in the TODO list you've written?
> 
> > 
> > 	As for the samples, I already have some QT files that use (I
> > believe) 24-bit RLE. However, I know someone who works with Apple
> > multimedia and I'm going to politely ask her to make up some samples of
> > all 7 variants for testing. I'll be sure to share with the rest of the
> > group, too.
> > 
> > > did you saw the sourcecode? i think it's hard to implement it into mplayer
> > > (the win32 version is fully completed in the sources, the linux one is
> > > non-completed), but i wish you good luck to it.
> > 
> > 	Yeah, I have all the source code. Anyone who registers (freely) at
> > vp3.com is welcome to download the latest CVS snapshot, and also access
> > the repository and developer's BBS. I just need to sift through it all and
> > find the modules to which I can feed compressed frames and get back
> > decompressed frames. And I believe the VP3 license is loose enough that we
> > can just include the relevant source files into the MPlayer codebase.
> > 
> > 	Unless, by "did you saw the sourcecode?", you meant "have you
> > glanced at the sheer enormity of the task ahead?" Well, all I can say is
> > that I figured out enough of the MPlayer codebase to add a video decoder
> > AND a file demuxer...there is *no way* the VP3 source could be more
> > convoluted...:) (and it isn't; I've seen it)
> > 
> > 	-Mike Melanson
> > 
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> > MPlayer-dev-eng at mplayerhq.hu
> > http://mplayerhq.hu/mailman/listinfo/mplayer-dev-eng
> 
> --
> alex
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