[vorbis-dev] ACM codec

[Vitaly Nechyos]

Good day.

I think a valid wraping Ogg Vorbis format in WAV cover is not reasonable
(even
impossible). Off cause if Ogg Vorbis ACM codec will not require specific
operation with it (but in this case it will not true ACM codec).
The reasons:
- wraping any VBR format in WAV cover is hard in principle (at least because
of
problems with determining file duration and positioning - try to encode
something
with the Ogg Vorbis ACM codec and open encoded file in WinAmp);

As for particular Ogg Vorbis ACM codec:
- it has manufacturer ID=0 (as i know
there is a problem on NT system if there are several codecs with the same
manufacturer ID); format tags (WAVEFORMATEX.wFormatTag) for the codec are
unregistered and there is a probability, that you receive several formats
with the same
format tags installed.
- you will have the problems with using "user comments";
- you will have the problems with convertings "ogg" file<->"ogg - wav" file
(it will
be impossible without decoding);
- you do not have all capabilities that Ogg Vorbis library gives (e.g.,
quality
managed encoding);

It seems there is many other reasons.

Vitaly.

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