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

[Oded Shimon]

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've tried 'mplayer -srate 44100'
> but that didn't fix it.
> 'mplayer -speed 2' doubles both the video and audio speed. Since I
> couldn't find a way of changing the
> speed of just the audio, I've written a patch which does this (btw
> this is my first patch submission).

If I'm right, this sounds like a horribly broken video. You could try:

mencoder -speed 2 -noskip -ofps 25

(or whatever the original fps was.)


Either way, I don't really like your patch as it is, but it could be 
somewhat useful with files with a small gradual a/v desync..

- ods15