Audio Speed issue when ripping from DVD

Beanie wrote on 11/30/2008, 4:56 PM
Hi

RE "Import Video from Camcorder Disc" function. Not ideal to be ripping from DVD in Vegas I know, but often thats all you get supplied by the client. This particular one contained 8 cartoons. 4 of them ripped OK. The other 4 had no problems with the Video, but the audio was at the wrong speed, ie very slow. Curiously, the sound seemed to match the video in total length, ie they looked right on the timeline, but on hitting play, the audio was playing back slow - I'd say half speed. Sample rates were set correctly for the session.

Here's a clue and the probable cause - the audio ripped MONO on these ones ie one audio waveform, not a pair. The other 4 successful clips ripped in stereo.

Question is what to do about it?

Thanks for your time!

Comments

johnmeyer wrote on 11/30/2008, 5:39 PM
the audio ripped MONO on these ones ie one audio waveform,That's your answer right there. I have seen this with MP3, AC3, and other audio formats. Various software, when it encounters mono interprets it as a stereo stream, samples every other sample for each "channel" and ends up with something which plays either 2x or 1/2x normal speed.

Solution?

If you have Sound Forge, import it, do a channel conversion to stereo, and save back out as a stereo 48kHz WAV file.

Others may have better solutions. However, I'm about 99% certain that this is your problem.
Beanie wrote on 11/30/2008, 8:09 PM
ive not tried importing the sound to an audio editor john, will give it a go.
thanks.