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I've read a few topics on this but haven't been able to resolve my issue.
I imported 120fps 1080p footage and had Premiere auto-create the sequence, I then changed the timeline to 30fps and slowed the footage down to 25% to match (4x slow-mo). Yet when I do that the video footage gets really choppy, like 5fps. I'm using a Razer laptop with dedicated GPU mind you. Rendering doesn't seem to do anything. What am I doing wrong?
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Tried rendering the timeline to green?
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Yeah I did, but it stays yellow with the same stutter.
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Render in to out to get it green.
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Just expanding the reply by Ann Bens :.
...from the menu: Sequence > Render in to out.
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Thanks, that does fully render it. I guess it's a different issue I'm having because even when I render it, it still lags. I did some checking frame by frame and see that 4 frames are the same, then the next 4 frames are the same. So the lag isn't because of the rendering, it's because of something in the process.
I imported 120fp 1080p Nikon Z6ii footage. I created a new sequence from the clip. It plays fine at full preview (with a little jittery image), but when I slow it down to 25% that's when it gets laggy. I just want to play the footage at 25% speed. I created another sequence at 30fps rendered the footage on there, but it too also just has the same frame for like 8 frames in a row. I'm not sure what I'm doing wrong..
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Post screenshot of 120 fps clip in MediaInfo in treeview.
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Nikon Z6 II Mirrorless Camera records the following modes:
Recording Modes | H.264/MOV/MP4 4:2:0 8-Bit UHD 4K (3840 x 2160) at 23.98p/25p/29.97p Full HD (1920 x 1080) at 23.98p/25p/29.97p/50p/59.94p/100p/119.88p |
These are interframe formats and as such not suited for retiming.
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I've seen this on certain types of footage. It may be that the best you can do is export out what you have and bring it back in as a rendered file of the original in slomo. I expect that will be your easiest solution
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Edit ProRes source in a Sequence with Video Preview set to matchign ProRes settings and everything should play smoothly.
To quickly transcode all of your 1080p120 clips, insert all of them into a new Seqeunce via New Sequence from Clip and then use Render and Replace. Make sure each clip is playing from Media Start to Media End. After the transcode is complete, make sure Sequence Video Previews are set to the same flavor of ProRes that was used for Render and Replace.