[Ogg Vorbis] Ogg encoding for 5.1 DVD soundtrack (solved ?)

[brancaleone]

I've been trying to transfer the 5.1 soundtrack in DVDs to a 6 channel .ogg file.

I kwow there are a lot of problems with 6-channel oggs, but I am using this "method" to do it.

[brancaleone]

I've returned to this old lonely post because now I believe I've found the answer, so others may benefit from it.

The problem can be solved adding the -nowaveheader option to the mplayer command.
I think the problem isn't the header itself, but the channel layout.
It seems that without the header, oggenc is free to read the input stream the way he wants to do it, and the problem disappears.
If you try to change the channel layout -- with or without the wav header -- it will distort the last two channels in the way described.


One last melancholic remark:

All this is pointless, at this moment the 5.1 channel ogg-vorbis files are worse than the standard ac3 files because they don't support channel coupling, so we can't get decent quality with less bitrate. In fact, at the same bitrate it will sound worse than the ac3.

This topic is dicussed at this post:https://forums.gentoo.org/viewtopic.php?t=280847
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