[Ffmpeg-devel] WMA encoding and Windows Media Player for Mac OS X

Michael Niedermayer michaelni
Mon Mar 5 11:53:17 CET 2007


Hi

On Sat, Mar 03, 2007 at 07:03:04PM +0000, Patrice Bensoussan wrote:
> 
> >>
> >> On 8 Feb 2007, at 23:05, Michael Niedermayer wrote:
> >>
> >> >Hi
> >> >
> >> >On Thu, Feb 08, 2007 at 10:37:54PM +0000, Patrice Bensoussan wrote:
> >> >>Hi,
> >> >>
> >> >>All the files encoded by ffmpeg in wma (using wmav1 or wmav2) will
> >> >>open in Windows Media Player for Mac OS X, but you don't hear
> >> >>anything (it only plays silence). The same file seems to play
> >> >>correctly with mplayer or QuickTime with the Flip4Mac codec.  
> Any idea
> >> >>what could be wrong in the encoding which would cause Windows  
> Media
> >> >>Player for Mac OS X to play only silence? The information  
> window in
> >>> >>Windows Media player on a converted file shows:
> >> >>
> >> >>audio codec unknown
> >> >>video codec wmav1
> >> >>
> >> >>Am I missing an option, or is this a known bug in ffmpeg?
> >> >>Thanks,
> >> >
> >> >hmmmm :(
> >> >does it work if you mux into .avi ?
> >>
> >> Believe it or not, Windows Media Player doesn't play .avi files on
> >> Mac ;-)
> >>
> >> >does it work if you -acodec copy a working wma into .asf ?
> >>
> >> No, same problem. The interesting thing is when doing this, the
> >> original file shows:
> >>
> >> Length: 00:35
> >> Bit Rate: 160 Kbps
> >> Media Type: Audio
> >> Audio Codec: Windows Media Audio V8
> >> Video Codec: Unknown
> >>
> >> whereas the .asf generated with -acodec copy shows:
> >>
> >> Length: 00:34
> >> Bit Rate: 160 Kbps
> >> Media Type: Audio
> >> Audio Codec: Unknown
> >> Video Codec: wmav2
> >>
> >> So the codec info is stored at the wrong place it seems? (video
> >> instead of audio) Not sure this is related though.
> >
> >ive changed a few things in the asf muxer, please retry and report  
> if theres
> >any improvment (or other change)
> 
> Sorry forgot to test this one...

the Audio/Video codec names and order should be fixed, please retry and
report back

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

No great genius has ever existed without some touch of madness. -- Aristotle
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