Dropped frames

[Walter Biscardi]

Was this file originally recorded from another source such as a tape machine?

I’ve never heard of a file exported from within an NLE digitally creating dropped frame. Outputting to Tape, sure, but never just creating a digital file within the computer.

Walter Biscardi, Jr.
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[Daniel Neutzsky-wulff]

No, it was recorded on an Alexa and we edited the footage natively in Premiere Pro. I’ve even tried copying the entire project and all of the media onto a new RAID, with the same result. I even tried creating a completely new project and bringing in the sequences from the old project, but it still results in dropped frames. I’ve tried flattening the PSD’s as well with the same result.

[Kris Merkel]

Are you encoding the video through AME? How are you exporting the video to Prores4444. If you export to another prores flavor do you see the same result? Prores 422 (HQ), prores 422? What is your encoding data rate?

Lots of questions few answers here without knowing your workflow. If you set the data rate to high the final file may not be able to be played back smoothly because of huge data spikes in the file which would cause dropped frames. Also unless you are outputting for a 4K delivery you gain no advantage encoding to 4444 over 422 (HQ)

If you share your encoding setting we may be able to help more.

“Think of everything in terms of building capacity.”

Kris Merkel
twitter: @kris_merkel
Product Manager, Flanders Scientific Inc.
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[Daniel Neutzsky-wulff]

skrmbillede2013-05-13kl.16.44.17.png

[Kris Merkel]

Everything looks good on your output, AME does not give you many choices to change parameters on output. Your limit bit rate is high, I would hold max to 8 or less, that is just me however.

Are the dropped frames during transitions, quick movement, the beginning of still frames( pics) and have you exported with a different codec and experienced the same results. I would suggest encoding a Prores 422HQ and seeing if you can tell any difference.

Are your deliverable specs Prores4444?

“Think of everything in terms of building capacity.”

Kris Merkel
twitter: @kris_merkel
Product Manager, Flanders Scientific Inc.
http://www.shopfsi.com
Co-Founder, Atlanta Cutters Post Production User Group
http://www.atlantacutters.com

2.2Ghz MBP core i7
16Gb RAM
CS6/FCP7
AJA T-Tap
AJA IO XT
FSI LM-2461W/CM-170W

[Tim Kolb]

Is the depth shows 24…I’m not sure I understand that number…I would assume it’s 3×8 bit color channels, but ProRes 4444 should be 10 bit per channel, yes? You’re rendering in max bit depth, so you should write the file at 10 bits per channel.

However, I don’t think that’s the frame dropping issue.

I think you want to uncheck “optimize stills” as that could be what is confusing the inspector as far as frame dropping. It’s good for long GOP exports, but you don’t want it for a mezzanine I-frame format. I’d uncheck that, give it a shot and see if that takes care of it.

TimK,
Director, Consultant
Kolb Productions,

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