Jittery sound on slow-motion converts

[friction]

Hi Guys,

If I open a file from the command line like this:

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"c:\Program Files\VideoLAN\VLC\vlc.exe" --rate 0.7 in.flv

The file opens up and plays at 70% the normal speed, great.

If I convert a file to mp4 like this:

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"c:\Program Files\VideoLAN\VLC\vlc.exe" in.flv --sout=#transcode{vcodec=h264,acodec=mp4a}:file{dst="out.mp4"}

The file is sucessfully converted and all is well.

However if I do both, like this:

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"c:\Program Files\VideoLAN\VLC\vlc.exe" --rate 0.7 in.flv --sout=#transcode{vcodec=h264,acodec=mp4a}:file{dst="out.mp4"}

Then the sound goes all jittery and crappy. What am I missing?

[Rémi Denis-Courmont]

You need to resample the audio track. If you simply playback, this will be automatic, but it cannot be automated in streaming (since it requires decoding and re-encoding).