Using vitual dub to save sound on a xvid to wav then besweet to re encode sound to PAL. Then setting the fps on the video to 25 in VD, even though the resulting video and sound are the same length when I join them back together in VD the sound is out of sync. Any ideas why, I have done this okay in the past.?
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I have done this many times, exactly the way you say, and have had no problems, unless there was a resample 44.100 to 48.000 involved at the same time.
If so, I resample when extracting wav with VirtualDub, and if still happens, the I extract wav as it is, and resample with r8brain.
HTH -
I didn't touch the sampling freqs but I will have another go at it later and check that they match before and after.
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If the sound is displaced by a fixed amount the original AVI file may have had an audio delay. By demultiplexing the audio and reencoding it you lost the audio delay. Examine the original source with YAAI to see if it had an audio delay. When you remux in VirtualDub use the same delay value (Audio -> Interleaving -> Audio Skew Value).
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