[Ffmpeg-devel] AMR narrowband decode broken

[Michael Niedermayer]

Hi

On Mon, Feb 19, 2007 at 02:41:54PM +0100, Erik Leerkes wrote:
>  
> 
> I am trying to decode a 3gp file containing amr narrowband audio. I am
> encoding to a wav file.  (ffmpeg -i sample_50kbit.3gp sample_50kbit.wav)
> 
> I am using ffmpeg CVS (2007/2/16).
> 
> My platform is x86_64.
> 
>  
> 
> FFmpeg version SVN-r7991, Copyright (c) 2000-2007 Fabrice Bellard, et
> al.
> 
>   configuration: --enable-amr_nb
> 
>   libavutil version: 49.3.0
> 
>   libavcodec version: 51.33.0
> 
>   libavformat version: 51.10.0
> 
>   built on Feb 16 2007 17:43:34, gcc: 4.1.2
> 
>  
> 
> When using the amr narrowband float version (--enable-amr_nb) the decode
> of amr narrowband results immediately in a segmentation fault.

segfault without gdb output -> read and follow bugreports.html


> 
> When using the fixed version (--enable-amr_nb_fixed) the command
> produces a very large file containing only noise.
> 
> Using both together is no longer allowed (--enable-amr_nb_fixed
> -enable-amr_nb) and is refused by configure. 
> 
>  
> 
> Earlier versions of ffmpeg (before august 30 2006) did not have this
> problem. However, in these versions it only worked if the configuration
> is using both the fixed and the float version!
> 
> (--enable-amr_nb -enable-amr_nb-fixed).

i dont think float+fixed was supported, rather that one was disabled behind
your back, if thats the case you should identify which worked and do a binary
search in svn versions to find out when that version broke

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I have often repented speaking, but never of holding my tongue.
-- Xenocrates
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