Why are some of my clips so CPU intensive and others aren't

New Here ,
Feb 16, 2021

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Hi, apoligies I'm not familiar with the jargon in Premiere Pro. I am doing a large timeline in a project by adding various mp4 clips. When I add each clip I scroll through the clip in the timeline and edit. The problem is some clips that I add to the timeline scroll with ease (and don't seem to tax my cpu at all) which is great, but other clips I add make my CPU usage go right up and it is very "sticky" to scroll through the timeline in them - eg I'm dragging the mouse along the timeline and it stops being smooth and starts jerking and the CPU goes crazy. I can't see any difference between the various clips that I add so I'm not sure why some scroll with ease and others are like treacle. It makes it very labor intensive to scroll through these clips as I have to go really slowly so the CPU keeps up whereas other clips I can scroll really fast and smooth.

Any advice welcome.

Thanks

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Editing, Hardware or GPU, How to, Performance

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1 Correct Answer

Enthusiast , Feb 16, 2021
basil1891 Enthusiast , Feb 16, 2021
Likely, your CPU-intensive clips is of different (more compressed) codec, or different (higher) resolution. Try to turn off 'continuous video thumbnails', should help. But if you can't give up on this -  transcoding into intermediate codec(Prores, DNxHR, Cineform) or using proxy is way to go.

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Enthusiast ,
Feb 16, 2021

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Likely, your CPU-intensive clips is of different (more compressed) codec, or different (higher) resolution. Try to turn off 'continuous video thumbnails', should help. But if you can't give up on this -  transcoding into intermediate codec(Prores, DNxHR, Cineform) or using proxy is way to go.

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New Here ,
Feb 16, 2021

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Thanks, that helped speed it up!

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Adobe Community Professional ,
Feb 17, 2021

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I made a video about your issues a couple of days ago. Premiere Pro has to do the redraws in order to play. That is bad coding. That being said Premiere Pro should probably use the GPU for the redraws/refresh not the CPU. We need to make a feature request to the use the GPU and not the CPU. If anyone else is wonder how continous frames affects performance feel frree to watch the video below.

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