• Adobe Premiere Pro

  Audio sync drifting in long clips

  Posted by Alan Moger on March 10, 2016 at 5:43 pm

  We shot a short film a few days ago using the Arri Alexa. We used 25fps at 2k resolution, with no onboard audio recorded into the camera. We recorded audio separately. When syncing up the audio with the clapperboard the start of the clip is in sync, but as the clip goes on the audio drifts away leaving it out of sync. The sequence settings are matched with the 25fps, what on earth is going on here?

  Alan Moger replied 10 years, 5 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Vince Becquiot

  March 10, 2016 at 6:36 pm

  Hi Alan,

  I’ll start with the obvious: Can you confirm that your footage is interpreted at 25P?

  Can you also confirm that the sequence audio sample rate matches your audio track?

  Vince Becquiot

  Indigo Live | Kaptis Media

  San Francisco Bay Area
• 

  Alan Moger

  March 10, 2016 at 6:58 pm

  Thanks for the post Vince.

  I can confirm that both the footage is interpreted at 25fps, and that the audio sample rate matches the sequence at 48000 Hz.

  AJ

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