[vlc] Re: AMR stream query

[Alex Antropoff]

On Fri, Mar 17, 2006 at 10:40:46AM -0000, chris.2.dobbs at bt.com wrote:
> All,
> I have recently fixed a bug in the ffmpeg project to allow me to play (using the ffplay tool) AMR-NB over rtsp.
> I now want to play this stream using vlc so I rebuilt vlc using the new ffmpeg libraries I have made and vlc seem to recognise the stream type ok now and opens the correct codec inside the ffmpeg libraries but I just get noise on the audio playback.
>  
> I have narrowed the problem down to the following routine (inside ffmpef)
>  
> amr_nb_decode_frame()
>  
> Which normally is passed a buffer containg the amr frame in which the first byte should be the toc byte , I have compared this to the output of ffplay and I get different data in the buffer - this suggests to me that vlc is incorrectly unpacking the rtp payload.
>  
>  
> I wondered of anyone out there could point me at the correct code area within vlc where this operation takes place as the code base is HUGE and after having a quick look i can't see where it's done.
>  
> Many thanks in advance,
> -Chris Dobbs
VLC use for receiving rtsp/rtp "LIVE555 Streaming Media" libraries.
See modules/demux/livedotcom.cpp
I got the same problem as you.

-- 
Regards, 
Alex Antropoff

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