Lip sync software

[ssa_newbie]

I'm doing some dubbing work and having trouble syncing the voices with the mouth movements. Do any of you experts know a paid or free program to do this? Thank you very much

[redwudz]

Not designed for that, but with MPC-HC you can adjust the audio sync, positive or negative, then when correct, use that to set a sync offset to correct sync errors with a video editor.

EDIT: 'Options>Playback>Sync Renderer Settings'

This will only work with offset sync errors. If the error is caused by the audio and video files being different lengths, then then you have to adjust one of those.
Unfortunately, it's mostly trial and error. I try not to cause sync error.

There may be a commercial or freeware program designed for sync correction and one of our members may make a better suggestion.

[smrpix]

"Dubbing work" is pretty broad. I'll pull all my tracks into an NLE and make fine adjustments manually line by line -- but maybe you're doing something completely different.

[Cornucopia]

If you use a DAW like ProTools, there is a great plugin called "VocAlign" (SynchroArts) that can match waveforms (nearly) automatically. Even using quite different recordings or voices. But it isn't cheap.

Otherwise, it's a matter of matching Audio waveforms (original/raw vs. replacement), particularly their peaks or onsets. Lots of slipping/nudging, starting coarsely and then getting finer & finer.

If, however, you're trying to sync V to A without any existing raw A, it will be completely manual trial & (lots of) error (with lots of looping & jogging)...

Obviously, for most NLEs, you can't get finer than one frame's worth. That's why I suggested DAWs, as you can drill down to the sample level.

Scott

[manono]

Like redwudz mentioned, MPC-HC can be used for this. To fine tune the delay I use AviSynth's AudioGraph filter in an Avisynth script to synch the audio (using a sharp noise, like a punch to the chin or gunshot or something) with the video:

A=AviSource("MovieFinal.avi").ConvertToYUY2()
B=WAVSource("MovieFinal.wav")
AudioDub(A,B)
#B=B.DelayAudio(-0.12)
AudioGraph(2)####number of frames on either side to display audio (5 video frames worth of audio in this example)