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Activity Forums Avid Media Composer audio rate troubles

  • audio rate troubles

    Posted by Cheditor on July 12, 2007 at 5:15 pm

    We have a 2 hour video and today received the music file which was created using a DVD with timecode burn from our timeline. The music comes into our system about 15 seconds short. As in, it starts fine, but as it goes on it slowly begins to lose sync and by the end of the show, the audio is way off and ends 15 seconds early. We’re experimenting with the compression/expansion tool now, but there has to be something else going on here. For one thing, their audio is 44.1 and our project is 48, so we tried converting both ways (change the audio to 48 or change the project to 44.1) but it made no difference in the lengths. Shouldn’t it have?
    I’m guessing this is a common mistake, we just don’t ever send audio work out of house, so we can’t figure it out. Any help would be appreciated.

    Simon Dales replied 18 years, 9 months ago 4 Members · 3 Replies
  • 3 Replies
  • Geraint Pari huws

    July 12, 2007 at 6:27 pm

    how were they locking their kit to the dvd, did you give them ltc audio??? Did they rip the dvd and then encode, possibly to a differant frame rate??? were they free running…

  • Michael Phillips

    July 12, 2007 at 8:21 pm

    Are you working from 24fps source in either a 29.97 or 23.976 project or vice versa? It almost sounds like a .1% drift over the course of the two hours…

    anything 24fps

  • Simon Dales

    July 21, 2007 at 8:24 pm

    Ive had this problem before. Not a hundred percent sure why it happens, think it may have something to do with different versions of Avid. However, the way to get around it is instead of playing the video as you normally would, use the Digital Cut tool in Avid to play and it will not go out of sync. Hop this helps.

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