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Replay shudder in Finalcut
We’ve shot at 59.94 frequency, 60 frames per second (720p60) and imported into FinalCut HD 5.04 using firewire and the easy setup for DVCPROHD 720p60… we put the footage in a 60 FPS timeline and when we replay and view on the 19inch mac monitor (select View – Video playback – Preview -Full screen) we get a “shudder” . The footage plays okay for maybe two seconds and then does a little “shudder”. It is of course especially noticeable on closeups that track or pan (which is a lot of what we have). Now if we select View – Video playback – Preview -RAW, we don’t get the shudder but the picture format is squashed (like squeezed anamorphic). We are running a top of the line Quad Processor g5 with 8gig ram and an internal rocket raid..with at least 200 gig free on its terrabyte of memory. We do have Blackmagic Multibridge Extreme but didn’t use it to load… in fact we have it turned off.
Any ideas?
PS footage looks fine in viewer.
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5 Replies
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[Blackduck] “The footage plays okay for maybe two seconds and then does a little “shudder”. It is of course especially noticeable on closeups that track or pan (which is a lot of what we have).—- Now if we select View – Video playback – Preview -RAW, we don’t get the shudder but the picture format is squashed (like squeezed anamorphic)……. PS footage looks fine in viewer.”
BD,
is this really 60p footage ( shot at 60fps) or is it just playing back some other frame rate playing back in the 720p60 data stream.?
Are you sure that your footage is on your raid?
This type of problem is almost always an issue with the storage not playing fast enough.
Why not use the BMD card- they have a set up for DVCPROHD content and using it would confirm if it is not playing properly that the storage is a fault.gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
Chicago, IL -
[Blackduck] “PS footage looks fine in viewer.”
FYI
there is no guarantee that the footage in the viewer is playing all of the frames.gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
Chicago, IL -
Thanks for the thoughts so far. Yes we shot it at 60 fps and replay it in a 60 fps timeline. I must admit I haven’t kept up with the Final Cut vs Panasonic issue re PAL. Maybe its all been resolved and we can start shooting at 50… we shoot cars so 25P is no good to us. But as last I understood it, a quirk in the system means that Final Cut loads all 60 frames not just the “flagged” ones when you load via firewire and the DVCPRO codec.
We have tried shooting at other frame rates but because FInal Cut would only accept the 59.94 frequency through firewire and it appeared to always load all 60 frames anyhow we gave up trying other frame rates and just stuck with shooting at 60. (I will however check with our DOP in case he backed off to a lower frame rate for the night stuff…I heard mumblings about it giving a half stop more light or something)
We went to the DVCpro Codec to save space. Is it wrong to think that the DVC PRo codec would play “easier” on a system than uncompressed? If needs be we’ll reload through Blackmagic..but its 22 hours of footage so we are hoping not to have to. Anyone else had this problem. -
Thanks again Gary, will try Blackmagic card.
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[Blackduck] “Thanks again Gary, will try Blackmagic card.”
I prefer the Kona Cards for use with the Varicam. they just work better IMHO
gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
Chicago, IL
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