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Old June 14th, 2010, 07:24 PM   #1
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Any ideas to fix this Clip Speed judder?

I am editing an HDV timeline but adding some DV footage using FCS 6 on Snow Leopard. If I change the clip speed of the DV footage in a DV timeline, it renders fine (see "good-DV" attachment). However, if I do the same thing in an HDV timeline, I get a judder as shown in the "bad-HDV" attachment. Applying the de-interlacing filter does nothing to address the problem (I tried all variations). Also, the problem only happens if I select "Blending" in the Clip Speed popup.

Any ideas to make it work? TIA
Attached Files
File Type: mov good-DV-16x9.mov (379.1 KB, 66 views)
File Type: mov bad-HDV-16x9.mov (390.3 KB, 80 views)
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Old June 14th, 2010, 08:37 PM   #2
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That looks like a field order problem. Check the clip. Did Final Cut automatically add a "switch fields" filter to the DV clip? If so, remove it.

Though actually, HDV and DV have opposite field orders, so I would expect that you should ADD the switch fields fiter to the DV material (on an HDV timeline) in order to get rid of your problem.
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Old June 14th, 2010, 10:38 PM   #3
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When adding the DV clip to the HDV timeline, FCP adds a switch (-1) field filter. Removing it does not fix the problem. Adding a de-interlace (Upper-Odd) after rendering the clip does not solve the problem. I have attached clip of the source DV footage.
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File Type: mov C27.mov (1.49 MB, 50 views)
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Old June 15th, 2010, 05:56 AM   #4
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Do the clips have the same framerate?
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Old June 15th, 2010, 06:52 AM   #5
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Yes. All clips are 29.97FPS in the original.
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Old June 15th, 2010, 07:09 AM   #6
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I'm stumped....
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Old June 15th, 2010, 08:28 AM   #7
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Have you tried bringing it into another sequence?

You could try exporting a self contained movie from the DV sequence with the time change & then re-import it.
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Old June 16th, 2010, 01:33 AM   #8
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Chris's post is the correct workflow for FCP; you can't import a differing codec than the original sequence settings and do a time remap of any kind and have it "conform" properly. Do your speed change to the DV clip outside the original sequence, either in a separate timeline or, in Motion, then import that *pre-rendered* clip into FCP. Note that if you attempt to cut that imported clip and then re-render you'll end up with the same judder problem again.
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