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<blockquote data-quote="Simon Eves" data-source="post: 207491" data-attributes="member: 4463">I get this all the time, and I&#039;ve never found a combination of gear or work-flow which solves it properly.I often record musical theater performances as a multi-track through my X32 board to Reaper on a Mac laptop. The video is done by somebody else, with similarly modern gear, but when he sends me a WAV of the audio captured from his camera (most often a recent Canon AVC-HD model) it always drifts. For a while I thought it was something like 29.97 vs 30, which would account for 1 second in an hour, but sometimes I get more than that, and it&#039;s not consistent across gear. Most recently, I had the same with video shot on a Panasonic GX85 micro-four-thirds camera (4Kp30, which is really 29.97).I don&#039;t have any pro editing software (FCPX, Premiere, PluralEyes) so my solution is just to line up the waveforms and measure the offset as accurately as possible and then calculate the speed change required to stretch or squash my final mixed audio to match the camera audio. This is usually some fraction of a percent. Reaper can do this accurately as a clip option. So far, when I&#039;ve given audio processed like that back to the video guy, it has dropped right in.PS. The speed change is never noticeable to the listener, as it&#039;s so small.</blockquote>

[QUOTE="Simon Eves, post: 207491, member: 4463"] I get this all the time, and I've never found a combination of gear or work-flow which solves it properly. I often record musical theater performances as a multi-track through my X32 board to Reaper on a Mac laptop. The video is done by somebody else, with similarly modern gear, but when he sends me a WAV of the audio captured from his camera (most often a recent Canon AVC-HD model) it always drifts. For a while I thought it was something like 29.97 vs 30, which would account for 1 second in an hour, but sometimes I get more than that, and it's not consistent across gear. Most recently, I had the same with video shot on a Panasonic GX85 micro-four-thirds camera (4Kp30, which is really 29.97). I don't have any pro editing software (FCPX, Premiere, PluralEyes) so my solution is just to line up the waveforms and measure the offset as accurately as possible and then calculate the speed change required to stretch or squash my final mixed audio to match the camera audio. This is usually some fraction of a percent. Reaper can do this accurately as a clip option. So far, when I've given audio processed like that back to the video guy, it has dropped right in. PS. The speed change is never noticeable to the listener, as it's so small. [/QUOTE]

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