Sync separately recorded audio - seems stretched

[clintdavis]

I have video I recorded with a camcorder and audio recorded with a separate mic. I can import them both fine and sync them at the beginning. My problem is that over the course of the video (36 minutes) by the end the audio is early by about 3 seconds.

 

Is there a way to stretch the audio to fit the video? I've tried the change clip speed but in increments of 1%, it's not fine enough control. Any ideas?

[Nationalsolo]

Hi

 

This is an inherent problem when synching a separately recorded sound track to a video. You could try changing the speed of the soundtrack keeping the pitch the same. This will lengthen or shorten the soundtrack, the minimum change being about 1%. The aim would be to adjust the total length of the soundtrack to make it the same as the video track length. Worth a try. You may not get it exact but it might be closer.( It's not clear whether you tried this with the sound or the video.)

The alternative is to cut the video at a few places where it won't be noticable, drag the right hand section up to the overlay track and pull it back sufficiently to re-establish the synch. Zooming in can help to get a small overlap if required. If the cut does jump noticably you could fade in the overlaid section to make it smoother.

 

Nat

[borate]

Good tips from Nat. To avoid this, simultaneous audio - during recording - should be sync-locked. It's not the fault of Videopad.

[c_major]

Hi,

 

You can stretch the sound track precisely in WavePad (our another product). Which also accepts a resultant duration instead of percentage.

 

It seems we can improve the speed change feature like WavePad's. Just need to make sure it also works for video.

 

Best regards,