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trouble capturing a DVCPRO 50 24 or 23.98 fram rate
I filmmed and edited a project in DVCPRO 50, 23.98 with Advanced Pulldown. I gave the project to a post house to do tape to tape color correction. They gave me back a DVCPRO 50 tape. The tape they gave me won’t capture correctly with the settings I’ve been using.
When I capture the tape in the projects native settings of DVCPRO 50 23.98 Advanced Pulldown, every 4th frame repeats in the captured footage.
When I capture the tape as 29.98 footage, every fifth frame repeats.
When I capture the tape as 24 frames, every 4th frame is interlaced.
From this information can anyone help me and deduct what settings I should be using to capture this tape correctly?
If you need more information, please let me know.
Thanks,
Jack -
5 Replies
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The online facility most likely outputted your project at 29.97, since that’s what most tape formats can record at. During this process, 3:2 pulldown was added to convert 23.98 to 29.97. This is “regular” telecine pulldown, which is different from 3:2:2:3 Advanced Pulldown.
In order to remove 3:2 pulldown, you should capture at 29.97 and use Cinema Tools to convert it back to 23.98. When using Cinema Tools, you’ll need to determine the right cadence which will be one of five choices. You can use trial and error to figure it out.
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Thanks.
I don’t know Cinema Tools well. Does anyone have a walk through of how to set up a project that would help me accomplish Sean’s suggestion.
I opened a test clip and did the reverse telecine with the following settings:
File: New (smaller)
Conform to: 23.98 standard upper/lowerThen I exported the file 20 times. Changing the “Fields” selection for each (as I went through all 4 Capture Mode settings). When I brought these clips into a 23.98 sequence in Final Cut, they did not have to be rendered, but they still looked the same- with every fourth frame being interlaced.
Thanks,
jack -
[JackNastowski] “I opened a test clip and did the reverse telecine with the following settings:”
Where did this test clip come from? Was it NTSC 29.97 video with 24fps footage?
Sean
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I’m not exaclty sure what the tape is- that’s my problem. But I captured it as 29.97. And when the freshly captured 29.97 clip is played, it plays back with every fifth frame being a repeat of the fourth frame.
I’m not sure if I am being too clear. If you need more information, or if you would like me to explain everything a little more clearly and concisely, let me know.
I appreciate your help,
Jack -
Ouch. What you are describing sounds bad. You’re saying that if you capture it as 29.97 NTSC, you get four distinct images every five frames? I’ve never heard of that and it sounds like you’ve got a bad tape master there. Regardless of anything, if you capture it at 29.97 it should look normal no matter what.
Basically, with 24fps footage on 29.97 media, you should see 2 complete frames, than 2 “jaggy” frames with mixed fields. Then 3 complete, 2 jaggy, etc. Hence the term 3:2 pulldown. Instead, what you describe is 4 complete frames, than a redundant frame in which the 4th is being duplicated. Very strange.
Definately call the place that did the color correction. It definately sounds like they screwed it up. Could they have thought this was PAL footage instead of 23.98 or something like that?
Before you call, try capturing via analog component or SDI. See if you get the same results. Or better yet, examing the frame structure on the tape itself by jogging frame by frame and viewing on a broadcast monitor.
Sean
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