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Re: Cineframe 30/Cineframe 25 resolution loss vs. 60i

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Re: Cineframe 30/Cineframe 25 resolution loss vs. 60i
by Barry Green on Dec 27, 2004 at 7:16:54 pm

[Steve Mullen] "DID ANYONE MEASURE CF24? "

Yes, I've got the same chart in CF24. It's difficult to measure the vertical resolution, because you can't just extract a still -- CF24 "pulses" with a rhythmic jitter/flicker that changes the vertical res number! Besides the erratic/uneven motion rendition, it is this pulsing and resolution change within frames that makes CF24 unusable, IMHO.

However, viewing stills from a group of five frames, it looks like the lowest res is 425, and the highest res is 575. It looks like there are two frames of 425, two frames of 475, then one frame of 575 in each group of five.

Here's an uncompressed .AVI extraction of a few seconds, so you can see the pulsing for yourself. It's a 176x120 extraction, about 10mb large:
http://www.icexpo.com/FX1-CF24-Res.avi
(be sure to right-click and "save as...")

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