Problem playing footage shot on Viper, 720p 59.94

Blackmagic Design

Problem playing footage shot on Viper, 720p 59.94

Posted by Dmitry Klischik on December 26, 2005 at 2:50 pm

Hello, everybody!

I have footage shot on Thomson Viper. Footage shot 720p/59.94 and digitized right from camera on the stage using BMD HDPro Dual Link, 4:2:2 10bit setup, using rental house’s equipment.

My setup is HDPro Dual Link, Multibridge, G5 2.7 PCI-X, RAID with 243 MB/s reading capability, FCP 5.0.3, QuickTime 7.0.3, SD CRT monitor connected to PAL out of Multibridge. The problem is that when i’m trying to playback this footage in Final Cut it freezes. System is still alive, so i can force quit FCP. Files i played well using QuicTime player – no problems.

Sequence preset in FCP set to 720p, 59.94
Playback preset to 720p, 59.94

I thought that the problem is within RAID. Moved the files to Firewire drive – the same effect.
Is the problem within Multibridge which is not have downconversion capability? Is that possible that multibridge freeze FCP on this matter? Is that possible to playback 720p, 59.94, on my system without any additional converter at all.

Please help!!!

Thank you,

Dmitry,
Milk Creative Services,
Kyiv

Jonathan Smiles replied 20 years, 4 months ago 3 Members · 2 Replies
2 Replies

Bob Zelin
December 26, 2005 at 3:54 pm

The Firewire drive is not fast enough to play back this uncompressed HD material. I am guessing that you still have a problem with your RAID, and you will not be able to tell until you do tests, by recording and playing back other material – perhaps at lower resolutions, like DVCProHD. If it plays back at lower resolutions, but not at uncompressed 8 or 10 bit HD, you have a RAID limitation.

I don’t care what these drive tests show that Blackmagic and AJA show on their drive exercise programs – they do not reflect (in my opinion) the accuracy of how the drives perform in real world situations.

Bob Zelin
Jonathan Smiles
January 2, 2006 at 10:14 am

What equipment did the rental house have (in detail) ?

What equipment do you have (in detail) ?

Can you scrub the video in FCPs Viewer window without it freezing ?

[Dmitry Klischik] “Is the problem within Multibridge which is not have downconversion capability? “
No

[Dmitry Klischik] “Is that possible that multibridge freeze FCP on this matter?”
No

[Dmitry Klischik] ” Is that possible to playback 720p, 59.94, on my system without any additional converter at all.”

I think your RAID is too slow, if you have 1280×720 10bit at 59.94 progressive frames per second the video only datarate is 145 Megabytes per second (MBs)

If you speedtested the RAID when empty and got 245MBs, when full it drop to 122MBs, to work with this footage you want a RAID that will do more like 400MBs when empty.

Jonathan Smiles
Managing Director/CEO
Digital Safari Ltd
UK – Specialist Reseller
dCinema – HD – SD
https://www.digitalsafari.co.uk

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