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Frames Dropped During Live Capture
I am trying to switch over to Adobe Premiere from Final Cut Pro, but am having a serious problem with frames being dropped during capture. When I do have frames dropped, it doesn’t even save the video that it was capturing. All that I get is a corrupt file that won’t open.
I’m using a Mac Pro with 3.0Ghz Dual Core Xeon Processor, 9GB 667MHz RAM, and a BlackMagic Decklink SDI card, and am trying to capture 720p 59.94fps video over SDI. I am capturing to an interal 1TB 7200RPM dedicated scratch disk that is not used for ANTYHING but live capture. The OS is 10.6.8.
I only have 3 capture options in Premiere using the Blackmagic card: 8-bit, 10-bit or DVCHDPRO. I want to use 8-bit, because DVCHDPRO is 960×720 instead of 1280×720. But, I have tried DVCHDPRO and it did not work either. I can successfully capture video for 5-10 minutes, but then I always get the Warning that frames were dropped and Premiere fails to save the video properly so that it can be opened.
I have used BlackMagic’s speed test app and determined that my internal hard drive’s data rate is plenty sufficient for both 8-bit and DVCHDPRO.
Final Cut Pro 6 has always captured perfectly fine using this exact setup. It even gives me a lot more capture options for the BlackMagic card – I’m not sure why I’m limited to only those 3 capture settings in Premiere.
I would really appreciate some help to point me in the right direction to get this resolve. Thanks!
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2 Replies
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Hi Tom,
I would guess that the 8-bit format you are recording now is not what you were getting before, and that you are currently recording as UNCOMPRESSED, which would explain the capture failures, as a single drive is not sufficient to keep up.
I’m not familiar with the Mac side of things, but I know that on PC, Decklink cards can record to the BlackMagic Motion JPEG compressed format, but maybe on Mac the 8 and 10-bit options are uncompressed only?
Jeff Pulera
Safe Harbor Computers -
Yes, I am now recording uncompressed, but BlackMagic’s disk speed app says my drive tests with plenty speed to record 8-bit.
Assuming that is the problem, why was I also unable to record in DVCHD 720p? That is a compressed format, correct?
Thanks for helping me!
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