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multicam playback unusable in premiere pro cc?

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Todd Mobleymulticam playback unusable in premiere pro cc?
by on Dec 4, 2014 at 3:24:41 am

I've seen others with this problem, but have not seen a viable solution to issues dating back 1 year. The multicam playback in premiere pro cc 8.0 and 8.1 is unusable. Choppy, won't play even a few frames at a time. Does anyone know if there is a fix for this problem?


Mac Pro running OS X 10.9.5

2 x 2.4 GHz Quad Core
32GB 1066 DDR3

Footage is from Canon 7D.

Trying to run multicam on 20 clips around 3:30 min each (music video).


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walter biscardiRe: multicam playback unusable in premiere pro cc?
by on Dec 4, 2014 at 12:28:47 pm

H264 always causes playback issues because of the scaling involved during playback.

what is your media raid system? That's what determines if multi-cam will work. We're doing GH4 4k multi cam playback on older Mac Pros and iMacs at our office. We drop the resolution down to 1/8 to ensure it works as smoothly as possible.

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Sam LanesRe: multicam playback unusable in premiere pro cc?
by on Dec 5, 2014 at 9:16:49 am

20 clips playing back simultanously usually requires a really fast RAID setup through via the fastest possible interface (T-bolt, generally).

You can run a disk speed check, such as the one available on the support section of Blackmagic's website, to see if your drives are capable of playing back so many tracks simutanously.

As a rule of thumb, take a look at the video info and see what the data rate of the video is, and multiply that by the number of clips - that will tell you what disk speed you need to be hitting.

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EricBowenRe: multicam playback unusable in premiere pro cc?
by on Dec 10, 2014 at 5:25:16 pm

The PCI-E slots have more bandwidth than Thunderbolt. Thunderbolt just gives you more bandwidth and lower latency than USB3 since it's a PCI-E 2.0 4x connection. The Thunderbolt drives still use SATA controllers so the performance is the same whether you put the drives on Thunderbolt or the internal SATA controllers. The only difference is when the drives are configured in raid and your comparing the controller in the Thunderbolt units to either the onboard controllers or SAS controller cards. SAS controller cards are always going to have the best performance if the raid array uses the bandwidth.

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Jake AbramsonRe: multicam playback unusable in premiere pro cc?
by on Dec 5, 2014 at 9:58:40 pm
Last Edited By Jake Abramson on Dec 5, 2014 at 9:59:05 pm

Try converting your file into something more efficient for the edit system like ProRes or just MPEG2HD. H.264 takes quite a bit of processing power to uncompressed. 20 clips is also quite a bit to load at once. Try starting with a few and then adding more in 1 by 1 to see what the threshold is.

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