[MPlayer-users] Re: [BUG] Wrong audio channel mapping when playing WMV3/WMVHD files

[Frank Aurich]

Corey Hickey wrote:
> Frank Aurich wrote:
>> Dominik 'Rathann' Mierzejewski wrote:
>>> On Sunday, 29 October 2006 at 17:27, Frank Aurich wrote:
>>>> Hello,
>>>>
>>>> When playing some (most) of the WMV-HD files provided at 
>>>> http://www.microsoft.com/windows/windowsmedia/musicandvideo/hdvideo/contentshowcase.aspx,
>>>> Mplayer doesn't get the channel order of the 6ch audio right.
>>>> The voice track is mapped to rear left (I wasn't able to figure out the 
>>>> mapping of the other channels).
>>>>
>>>> I tested these samples:
>>>>
>>>> http://download.microsoft.com/download/6/1/c/61ca6316-a44f-46ef-9e8c-074c3dd813c0/To_The_Limit_720.exe
>>>> http://download.microsoft.com/download/0/9/d/09d051c4-decc-4d39-9c57-f520187213a1/Amazing_Caves_720.exe
>>>> http://download.microsoft.com/download/2/0/9/20907788-993F-4EF6-8D75-F0DD93207FB8/AdrenalineRush_720.exe
>>>> This file was particularily interesting: When playing in Mplayer, I heard a 
>>>> french voice from rear left.
>>>> When using Media Player Classic, an English person spoke from the center. 
>>>> AFAICT, the video has only one audio track.
>>> Yes, this is a known problem, but AFAIK the maintainer of the code doesn't
>>> have a 5.1 speaker setup. It would help if you could find the correct
>>> mapping, for example using -af channels.
>>>
>>> Regards,
>>> R.
>>>
>> I did some digging and found the WMA channel mapping to be (supposedly):
>>
>> FL FR C LFE SL SR
> 
> Did you find this in some documentation somewhere? If so, can you send a
> URL? It would be useful for adding support for remapping other
> configurations, such as 5.0 and 4.0.
> 
> -Corey

I found this tool on Microsofts website:
http://www.microsoft.com/downloads/details.aspx?FamilyId=49A52710-78C1-4CB4-B94F-682E338062CC&displaylang=en
Microsoft Windows Media Audio 9 Professional Channel Mask Mapping Tool

It's in-built helpfile lists these mappings:

4.0: FL FR BL BR
4.0: FL FR SL SR
5.0: FL FR C BL BR
5.1: FL FR C LFE BL BR
5.1: FL FR C LFE SL SR
6.1: FL FR C LFE BL BR BC
7.1: FL FR C LFE BL BR SL SR
7.1: FL FR C LFE BL BR FLOC FROC

I'm not really sure what the difference is between BL/BR (back left/right) and 
SL/SR (surround left/right).


Hope that helps.



Frank