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Audio anomaly
Today I had to fix a 30 minute film which was sent back to me from a broadcaster because of sync issues. There had been a problem with two adjacent clips in the timeline (talking heads, both from one tape resp masterclip) . the audio was no longer in lipsync with the video. there were audio effects on the clips.
I manually trimmed the audio back to sync but after shutting down and restarting the computer the clips were out of sync again. this time the video-audio delay was slightly different.I already had similar problems in other longer projects. ie suddenly a music clip I had edited into the timeline played a totally different part of the original source clip. In these cases no effects were involved. I had to reconnect the masterclips with the files on my harddisk to solve these issues. Is there a known explanation for these problems? Is there any strategy to get around these issues? What is FCP doing with the files? How can files get out of sync internally?
Sequence and clips were prores422, pal 720x576widescreen, audio always 16bit 48000khz. latest fcp version.Sven
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1 Reply
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Probably not a real answer, but I had a similar thing happen sometime last year with an audio track playing back the wrong bit of a music track – the music track that I’d imported was a regular 48kHz 16bit WAV. I changed the track to an AIFF using Compressor and replaced it in the timeline and it then worked perfectly. I thought it was a one-off, but maybe there’s a bug somewhere…
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