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Timeline Frame Rate Questions
I am getting ready to start post on a travel show that is shot on HDCam at 23.98fps. The show is to be delivered to 3 different TV stations, one playing back at 720p59.94 and the 2 others at DVCam 29.97. I would like to maintain the master timeline at Prores 422 23.98p or 23.98Psf for archival purposes and the create versions in 720p59.94 and 480i29.97 for delivery. The HD and SD versions will be closed-captioned separately with MacCaption before delivery.
Here are my questions: Should I edit in a 23.98Psf timeline and then cut and paste the edit in a 720p59.97/480i29.97 timeline and then re-render? Or would the better workflow be to use a compression tool like Compressor or Episode Pro to make the different versions? Would the frame rate conversion of a completed movie (as against an active timeline) cause field blending across cut points?
Thank you for your input.
Vik Narayan -
8 Replies
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[Vik Narayan] “Here are my questions: Should I edit in a 23.98Psf”
There is not such “psf” sequence.
Psf is how the tape is recorded or how is streamed.
That stuff on your computer must be treated as plain Progressive. You need to edit it on a NONE sequence.[Vik Narayan] ” and then cut and paste the edit in a 720p59.97/480i29.97 timeline and then re-render? Or would the better workflow be to use a compression tool like Compressor or Episode Pro to make the different versions?”
An IO card would do it better, but if you have no access to one, go for Compressor; I don’t know about Episode for resizing and time-base correction.[Vik Narayan] “Would the frame rate conversion of a completed movie (as against an active timeline) cause field blending across cut points?”
Yes.
rafael -
As all your deliveries are in 29.97 frame rates, Why not shoot 29.97 psf?
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You best results will be from hardware conversions.
I would edit and master in 1920 x 1080 ProRes 422 23.98 Psf to HDCam tape
Is the 720P deliverable on SR? D5? DvcProHD?
That would determine the method of generation for the 720P master.
The 525 masters can be injested directly from the 23.98 Psf HDCam Master selecting the appropriate Frequency setting on the HDCam machine. The results of that capture would then be closed captioned for the SD delivery.
The same MacCaption file can be used to generate both the black movie for SD CC and the 708/608 QTCC for the HD CC
You will end up with a pulldown inserted to get to 29.97 from 23.98. Those pulldown frames will show interfield motion when viewed on a capable (broadcast) monitor.FCP will Not do this correctly by pasting into a timeline. Compressor can via frame controls. Hardware can in real time
Doug Beal
Editor / Engineer
Rock Creative Images
Nashville TN -
Rafael
Thank you for the clarification. I do have a Kona3G io card but one of the stations accepts the show as a QuickTime 720p59.94 file. I wanted to see if I can achieve the conversion without field blends across cut points-hence my question about creating timelines with multiple settings. Will I avoid field blends if I export to compressor directly from the timeline (as against converting a self contained movie).
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Michael
The show has been shot at 23Psf for the last 8 seasons primary for the aesthetics. We deliver to one station at 720p59.94 as a QuickTime file. The other 2 accept DVCam tapes. We may secure another distribution channel abroad soon that is keen about 24 as an easy conversion to 25fps. -
[Vik Narayan] “I wanted to see if I can achieve the conversion without field blends across cut points”
When you from 24 to 30 fps, you need to create 6 new frames per second. You can just repeat adjancent frames or create new frames by blending, Motion Compensation or whatever.
The only way to avoid any frame blending is by repeating adjacent frames.
This will avoid any blending on cuts, but also in the rest of the new picture. It will look more choppy.SSo if you want to avoid any blending, set the “Frame Control ON’ in Compressor and in “Frame Rate Conversion “, set “Fast: Nearest Frame”.
rafael -
Doug
Unfortunately we only have an HDCam player, not a recorder in the edit studio. So our HD archive as well as the 720p delivery go to disk. It is good to know that Compression does a better job than FCP with frame rate changes. So you suggest recapturing in SD for SD deliveries? -
I suggest that you master to HDCam. Recapture that HDCam master in SD to generate SD deliverables. Recapture that same HDCam at 1080i 59.94 to generate the HD deliverables
or in your case the 720P deliverables but since you can’t record HDCam it’s a moot point.
Are you delivering this as files?Doug Beal
Editor / Engineer
Rock Creative Images
Nashville TN
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