[FFmpeg-user] mkv to wav conversion out of sync

Tom Evans tevans.uk at googlemail.com
Mon Jul 7 12:05:53 CEST 2014

On Sat, Jul 5, 2014 at 7:33 PM, Cliff R Wong <cliff.r.wong at gmail.com> wrote:
> Dear All,
> I am using ffmpeg to extract the audio from an mkv file to wav with the
> following command:
> ffmpeg -i [input.mkv] -ar 8000 -ac 1 output.wav
> However, there is a roughly one second delay in the audio of the input mkv
> file and the output wav file. This is not a problem for avi and mp4 files.
> I have also observed this using the VLC converter. Getting the sync is very
> important for my application. Does anybody have any idea how to fix this?
> Or if you know the exact time delay, that would be great too. Thanks ahead
> for your help.
> Cliff

You're extracting an audio only track, so I'm curious, what is the
audio out of sync with?



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