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Yet another mixed frame rate question
Hi folks. Novice editor here. I know this question has come up dozens (or perhaps even hundreds) of times already, but my search-fu sucks and I’ve been coming across a lot of obsolete info, so I’ll take the chance of asking redundantly:
I am editing a documentary at 23.98 progressive (at 1080). I have recently received some archival material shot at 29.97 interlaced (NTSC DV). From a technical standpoint here in the year 2020, what is the *best* way for me to bring the interleaved 29.97 stuff down to progressive 23.98?
I am editing in Premiere (v11, Mac). I know there are several options within Premiere that do this kind of thing, but I don’t know which ones to use for optimum quality. I’m also willing to consider using non-Premiere tools to get the job done.
I only need info about the frame *rate* conversion. (The frame size stuff I already have a handle on.)
Any answers or pointers towards articles would be appreciated. Thanks!
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2 Replies
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If you add footage to a sequence in Premiere that is a different frame rate than the sequence, the frame rate is adjusted by Premiere automatically to match the sequence. It will choose whatever makes playback the most efficient, which usually results in adding or removing frames. If this plays back fine, you’re all set. If you don’t like it, you can right-click on the clip in the timeline to go to the Speed/Duration setting and alter the Time Interpolation selection (drop down box). Frame Blending is a smoother option, but more playback intensive for realtime playback. The Optical Flow setting usually does some better calculations, but requires rendering.
Something else you can do is right-click on your clip in the project panel and go to Modify>Interpret Footage. This lets you choose to use the frame rate from the file or a totally new frame rate that you can enter. It will calculate how your changes affect the clip duration. So you can make adjustments to the master clip here, or you can adjust in the timeline. Note that if you play footage from the project listing in the source monitor, it will play in the native frame rate.
Video Producer / Digital Marketer / Gear Reviewer / Author
—– http://www.AndyFordVideo.com —– -
Thanks much, Andy! I took your info and an on-line tutorial video and started experimenting last night. Result: I was able to take the SD footage shot on MiniDV and turn it into something very compatible with my film-look 1080p project.
In my case optical flow is clearly the best choice. These will be short enough chunks where rendering won’t be an issue. I might pre-render my selects as uncompressed before bringing them into my edit.
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