[MPlayer-advusers] [BUG] FAAD: compressed input bitrate missing, assuming 128kbit/s!

[Corey Hickey]

Corey Hickey wrote:
> Hello,
> 
> I've found an Apple h.264/AAC trailer that doesn't have any sound. I
> don't know if the problem lies with mplayer or with faad, but I figure
> somebody here will be able to tell for sure.
> 
> The file is available at:
> http://movies.apple.com/movies/disney/thechroniclesofnarnia/chroniclesofnarnia-pre_h1080p.mov
> 
> A full 'mplayer -v' log is attached.

I think I've managed to trace the problem down, though I don't yet know
how to fix it. This file appears to use a version 2 audio track, which
mplayer can't parse. Look at libmpdemux/demux_mov.c, line 665:

// TODO: fix parsing for files using version 2.

As it is now, version 2 tracks get parsed incorrectly, which results in
a variety of different audio problems (I have a few other files with
version 2 tracks).

Is there any documentation around on the structure of version 2 audio
tracks? This document seems to be outdated:

http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/chapter_4_section_3.html

Anyway, I'll look at tomorrow and, if nobody can find anything, I'll try
bugging Apple to see if we can get some specs so somebody can fix this bug.

-Corey