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Fast and Slow Motion
I just watched my short film on a big screen at a film festival, and was disappointed with the sequences where I changed speed. They lost resolution. I used Premiere Pro CS2 for that build. I’m upgrading to CS4 this weekend.
I’ve been reading these forums about Time Remapping, Time Warp, and Speed changes, and I’m confused about interlacing and de-interlacing. Because of my ignorance, I’m interpreting one thread as saying I should de-interlace because interlacing causes problems when changing the elapsed time, BUT another thread seems to say that I should NOT de-interlace because Premiere expects the clip to be interlaced. I’m confused.
The footage I’m having trouble with is 60i, shot on an XL2 on a miniDV tape, imported using Premiere CS2 as DV (same compression as the tape).
The shot that looked the WORST was simply a camera pointed at clouds, then sped up 2000% on the timeline. Seems simple, but it looks terrible. I saw some significant pixellation.
I probably used too many color correction filters, but they were new in CS2 and I lost my head. For this thread, let’s just say that I want to use Brightness & Contrast and also the simple piechart Color Corrector. I want to speed up some clips, and I want to slow down others. No variable speeds — just a steady speed per clip.
If I’m reading these forums correctly, I want to use Time Warp.
1. If I want to do slow motion on interlaced (60i) footage in CS4, should I de-interlace the footage first? If so, how, exactly?
2. If I want to do fast motion on interlaced (60i) footage in CS4, should I de-interlace the footage first?
As a side note: I shot one true timelapse, using a computer connected to a camera, snapping one 720×480 image every 15 minutes. That came into Premiere as sequential stills (non-interlaced, obviously), and I changed the speed on that clip — and it looked OK on the big screen.
I am seriously considering replacing my sped-up shots by exporting the clip to stills, writing a computer program to select and rename files, and building a sequential set of numbered files using, say, one in every 50 stills. That would basically reproduce a true timelapse and remove the need to change the speed in Premiere. But that won’t work on slow motion, of course, and I did a lot of different speed changes, above and below 100%.
Thanks for reading this far!
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2 Replies
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If you can, after using time remapping in cs4, save your files as a mp4 (NeroDigital). They keep all the quality that the video is supposed to have as seen in Premiere. Then you can encode and burn that to a dvd and everything should be fine.
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Thanks mikkell!
My question remains though. Should I de-interlace my 60i footage before using time remapping or time warp?
Thanks!
Steve
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