ShortScale.org

I'm using ableton to track one mic at the cab and my iPhone for video and a bit of speech. iMovie to combine them.

I separate the video from its audio and mute that leaving any speech and then use the cab mic for audio. All seems ok?

The longer the video goes on the more out of time my cab audio gets from my video? How does this even happy?

I use a clap at the beginning to sync them perfectly but it gets more out of time the longer the video runs. It only takes about 3-5 minutes for it to be noticeably out of sync???? Help please??? I'm guessing the issue is somewhere in iMovie????

Not sure, but maybe you have a different number of frames per second in the settings. NTSC and PAL have different numbers, and there are probably even more possibilities in the settings.