How do I find out order of channel mapping on DVD?

[zz2]

Hello!
How do I find out what is order of channel mapping on DVD?

[Skelsgard]

DVD-Audio, or AC3/DTS from DVD-Video?
DVD-A depends on the format: MLP uses grouping options (i.e. Group 1:L-R, Group 2: C-LFE-Ls-Rs) and I think LPCM uses standard WAV mapping, not sure (L-R-C-LFE-Ls-Rs).
AC3 uses L-C-R-Ls-Rs-LFE.
DTS uses L-R-C-LFE-Ls-Rs.

[zz2]

Thank you. I meant audio from video. So AC3 will always be L-C-R-Ls-Rs-LFE and DTS will always be L-R-C-LFE-Ls-Rs.

PS: I was asking this beacuse mplayer sometimes doesn't correctly map channels (I think it always assumes that it is AC3 audio).

[Skelsgard]

But know that when using transcoders, they usually remap the channel to the output format.
I.e. AC3 to WAV. AC3 is Ch1-L, Ch2-C, Ch3-R, Ch4-Ls, Ch5-Rs, Ch6-LFE. The transcoder remaps the output so WAV is Ch1-L, Ch2-R, Ch3-C, Ch4-LFE, Ch5-Ls, Ch6-Rs.