[MPlayer-dev-eng] [PATCH] Changing audio speed

Michael Niedermayer michaelni at gmx.at
Fri Jul 22 13:30:01 CEST 2005


Hi

On Friday 22 July 2005 12:44, The Wanderer wrote:
> Oded Shimon wrote:
> > On Thu, Jul 21, 2005 at 08:57:01PM +0100, Dean LM wrote:
> >> Hi,
> >>
> >> I'm not sure whether this has been addressed before, but I have a
> >> video with the audio sampled at 22050 Hz, when I try playing it the
> >> video plays at the correct speed but the audio is half the speed it
> >> should be (i.e. slooow).
> >
> > So, umm, you get a HUGE audio-video desync in just a few seconds? And
> > all the audio is of low bass because of pitch distortion?..
> >
> > I've never seen such a video. Am I understanding you correctly?
>
> I have a few files which exhibit the type of symptoms described (slow,
> low-pitched MP3 audio), although the audio in question is 32000 Hz. The
> problem currently manifests itself only with afm=ffmpeg; if I use mp3lib
> or libmad for audio decoding, the audio is played back properly.
>
> If memory serves, when I reported this at the time it was dismissed as a
> known problem with FFmpeg's MP3 decoder, and never followed up on.

i dont remember that but i could have easily missed a post ...
anyway, if anyone has such a file, upload, unless of course theres already 
such a file on mphq

-- 
Michael




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