Visual stretch tool

[dexter30]

Is there any edit software with a tool for stretching/shrinking audio time, in a graphic/visual way? (click and drag with the mouse instead of entering input values manually)

[stantheman1976]

I believe Wavelab audio software does that. I know for sure Sony Vegas does.

[dexter30]

I believe Wavelab audio software does that. I know for sure Sony Vegas does.

I have Vegas but didn't notice that tool in a visual way.. where's the button located??

[stantheman1976]

Go to the end of your waveform in Vegas and hold your cursor over it. Press the CTRL key and you'll see a "~" symbol. Hold your left mouse button and move the mouse to the left or right. You are no shrinking/stretching the audio.

[dexter30]

Go to the end of your waveform in Vegas and hold your cursor over it. Press the CTRL key and you'll see a "~" symbol. Hold your left mouse button and move the mouse to the left or right. You are no shrinking/stretching the audio.

Sounds great. I also need to shrink/stretch selections in differents points of the file. Does Vegas do that?

Thanks for the reply!

[stantheman1976]

What are you trying to do? Replace the audio source for a video?

[dexter30]

What are you trying to do? Replace the audio source for a video?

Yes, in order to add a new language track to a DVD. The problem is that this new audio comes from a TV recording at 29,970 FPS and has to be synchronized with a DVD video at 23,976 FPS. Using a stretch/shrink tool will cause
pitch change. Preserve pitch will slow down speaking pace. Maybe shrinking small parts of the new audio
at a time would work..

[guns1inger]

What are you trying to do? Replace the audio source for a video?

Yes, in order to add a new language track to a DVD. The problem is that this new audio comes from a TV recording at 29,970 FPS and has to be synchronized with a DVD video at 23,976 FPS. Using a stretch/shrink tool will cause
pitch change. Preserve pitch will slow down speaking pace. Maybe shrinking small parts of the new audio
at a time would work..

No, it wont.

Vegas should time stretch and pitch shift together, however if it doesn't you can use the non-realtime time stretch plugin to do it.

What you should be doing first, however, is IVTCing the video back to 23.976 fps, then trying to match the video.

You should only have to cut the audio into chunks if there are distinct sections, such as between commercial breaks, that need to be matched. If both versions just ply straight through then you gain very little by slicing your audio up and adjusting in pieces.

[dexter30]

...
What you should be doing first, however, is IVTCing the video back to 23.976 fps, then trying to match the video.

And how do I IVTC the video?

[guns1inger]

https://forum.videohelp.com/topic355330.html?highlight=ivtc may get you started. It isn't something that I do much - it is primarily an NTSC issue.