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QT stutters
Recently we’ve been working on a cut, DV50 @ 29.97 fps, from film shot at 30fps (so no 3:2 issues). When xxporting QT’s to the desktop, either reference or self-contained,they sometimes have a stutter –> If you watch the Playback fps in the Info pane, it suddenly drops from 29.97 to 15 or thereabouts… and it happens in different places on multiple exports of same file. This also translates over into compressed QT’s I make with compressor. If you step through the QT, all the frames exist, it’s not skipping anything.
Any ideas? ways to flush out QT prefs or cache file?
10.4.5
FCP 5.0.4
QT 7.0.4 -
5 Replies
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QT doesn’t play all codecs smoothly. Are your QT files exported using the DV50 codec? If so I would doubt that that would play back smoothly in the QT player. Also playing off the desktop probably is part of the problem; try putting the file on a faster drive.
Scott Davis
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Hm…. But if I load that file into FCP from the desktop, it plays out 100%. I’m on a dual G5 2.7 with a fairly empty SATA drive – so it’s plenty fast for DV50. Mabye QT player itself has the problem….
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I have been having this same exact problem with anything that needs rendering and it’s become a huge problem for me with 16 commercials due soon. Almost the same specs:
Mac OS X 10.4.6
FCP 5.0.4
DV50 – NTSC Codec
23.987At first I thought it was a glitchy firewire drive so I moved everything over to an empty SATA drive, everything plays fine with RT effects, the second I render to compress for the web or move over in After Effects, BAM, GLITCHES!!!
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But you’re getting glitches IN final cut? I only see them outside of final cut. i can’t pin down anything… we’ve got a feature film at DV50 @ 23.98 that hasn’t had ANY problem compressing… I originally thought it was the codec.
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[CharlieX2] “I only see them outside of final cut. i can’t pin down anything… we’ve got a feature film at DV50 @ 23.98 that hasn’t had ANY problem compressing.”
QT controls all of the graphics on your mac, not just then movie files. All of the GUI runs in QT. This is not the same as FCP does.
Chances are the chosen codec is requiring a faster drive than you have or that something else is robbing resources. FCP can pass off some of its needs to the GPU whereas QT cannot.
99% of all playback issues are a result of 2 things- your drives are not fast enough or too full to respond correctly OR QT having a resource conflict / decoding error.gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
Chicago, IL
gary@studio37.com
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