Length Shortens when Track Is Imported

Audacity Help Forum Windows
1

I’m running Audacity 2.0.3. on a Windows 7 Home Edition operating system.

I’m working on a video project and encountering syncing problems when I import audio to Audacity.

I save the video I need the audio from in Windows Movie Maker (2012 edition). The file’s an MPEG-4 Audio. For the sample I’ve been working with, it’s length is 22:46.29.

I import that track into Audacity. Once it’s in, it is 22:46.25.

I’ve tried adjusting the Project Rate and the import settings under Edit (Preferences) to no avail. What causes this problem, and how do I fix it?

2

You mean 22 minutes and 46.29 seconds, and the Audacity track is 0.04 seconds too short? Is that a problem?

3

It is when I return the audio to the video and the two are out of sync.

4

Is it out of sync all the way through, or does it gradually drift out of sync?

5

All the way through.

6

Then just move it along a bit to sync it up.
Many compressed audio formats have imprecise start times. If you need the start time to be exact you should use a high quality uncompressed audio format such as WAV.