[FFmpeg-devel] [PATCH] Fix MP2 audio detection for MPEGPS streams

[Taylor Ralph]

Baptiste,



----- Original Message ----
> From: Baptiste Coudurier <baptiste.coudurier at gmail.com>
> To: FFmpeg development discussions and patches <ffmpeg-devel at mplayerhq.hu>
> Sent: Sunday, June 7, 2009 2:45:48 PM
> Subject: Re: [FFmpeg-devel] [PATCH] Fix MP2 audio detection for MPEGPS streams
> 
> Hi,
> 
> Taylor Ralph wrote:
> > I occasionally have an MPEGPS stream with MP2 audio that doesn't have audio 
> due to the audio codec being misdetected as ADPCM_ADX. 
> > 
> > I've got a one-line patch that fixes the false detection when 
> libavformat/mpeg.c tries to determine if the audio in an MPEGPS stream is MP2 or 
> ADPCM_ADX. Basically a partial match of the string "Sofdec" will cause the code 
> to select ADPCM_ADX when it is actually MP2. I've opened a ticket here with a 
> full explanation:
> > 
> > http://roundup.ffmpeg.org/roundup/ffmpeg/issue1149
> > 
> > The patch is here:
> > 
> > 
> http://roundup.ffmpeg.org/roundup/ffmpeg/file346/ffmpeg_fix_mp2_detect_new.diff
> > 
> > I can also provide a sample if someone would like it.
> > 
> 
> A sample is definitely welcome.
> 
> -- 
> Baptiste COUDURIER                              GnuPG Key Id: 0x5C1ABAAA
> Key fingerprint                 8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA
> FFmpeg maintainer                                  http://www.ffmpeg.org

OK. I've uploaded the sample to upload.ffmpeg.org located at:

/MPlayer/incoming/mp2audio_misdetect_issue1149/mp2audio_misdetect_issue1149.mpg

--
Taylor