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Author Topic: OpenDCP adds pop at tail of audio  (Read 1630 times)

hdvprojection

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OpenDCP adds pop at tail of audio
« on: August 19, 2016, 04:08:18 PM »
I tried searching to see if anyone else had posted about this, but didn't see anything. I'm going back over all of my old DCPs, specifically the ones with 5.1 audio, and I'm finding - randomly - that  OpenDCP is adding a one or two frame long pop at the tail of each audio channel, always just the bottom of the waveform. Please see the attached jpegs. The pop is not present in any of the source WAVs.

Based on the common denominators of the DCPs exhibiting this flaw, I suspect it is related to duration adjustment at the packaging stage; they all had audio MXFs which were a frame or two longer than the picture MXF. Is there anything to be done about this? It looks and feels like a bug. Thanks.

hdvprojection

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Re: OpenDCP adds pop at tail of audio
« Reply #1 on: August 23, 2016, 03:05:45 PM »
Has no one else experienced this?

Terrence Meiczinger

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Re: OpenDCP adds pop at tail of audio
« Reply #2 on: August 23, 2016, 03:45:07 PM »
Yes, this can happen when your audio and video are not frame aligned. It should be corrected at the source, if possible. Otherwise, you could tell OpenDCP to reduce the duration by a couple of frames.

dcinemaforum.com

Re: OpenDCP adds pop at tail of audio
« Reply #2 on: August 23, 2016, 03:45:07 PM »