[MPlayer-users] Re: Quicktime sound atom v2: Wrong audio channel mapping

[Frank Aurich]

Frank Aurich wrote:
> Hi,
> 
> with the recent fix by Corey Hickey, new Apple Quicktime videos which 
> use the sound atom 2 (e.g. HD trailers) play fine in MPlayer.
> The audio channel mapping, however is wrong on 5.1 sound systems.
> 
> The speech channel, which should come from the center speaker, is mapped 
> to front left. I dont know about the others, mainly because it's 
> difficult to determine ;)
> 
> Tested with latest mplayer-cvs and the following trailers:
> 
> http://movies.apple.com/movies/universal/king_kong/king_kong-tlr_h720p.mov
> http://movies.apple.com/movies/wb/superman_returns/superman_returns-tlr1_h720p.mov 
> 
> 
> 
> Frank Aurich

Can anybody confirm the described behaviour on their system or is it a 
problem on my side?

I figured I could simply remap the channels by using the -channels 
option, but for that I'd first need to know the wrong mapping.
I was wondering therefore if anyone has a AAC audio or MP4 video file 
which uses Quicktimes sound atom 2, that clearly advertises each of the 
5 (or 6) channels (i.e. some test signal that simply puts a singular 
sound to each of the speakers).

Alternatively: Is there a way to create a AAC file  that shows the 
"wrong mapping" behaviour, either with Mencoder or any other software?


Cheers,

Frank