Peter Rzazewski Posted February 14, 2014 Share Posted February 14, 2014 Unrelated to the speed ramping problem I posted last week. I've been noticing that a lot of footage online has a bit of a jittery/jumpy feel when panning/dollying. For example, note the panning across the dash at 8sec in this clip: I've ran some tests with my camera at 1/48th shutter for 24fps comparing it to footage shot higher at 1/200th shutter and it's about the same. The footage was shot on a solid sachtler tripod and head so it's got nothing to do with shakiness in the camera. My understanding is that the higher shutter rate may be the culprit, but in my case it does not appear to be so. What could it be? A few ideas, maybe you could help me isolate the problem: - slow CF cards (my fastest card is a 200x 8gb)? - settings in camera? Note that I am using magic lantern as well ? Thanks. Peter Quote Link to comment Share on other sites More sharing options...
fuzzynormal Posted February 14, 2014 Share Posted February 14, 2014 That's not a pan. It's a bad slider shot and the unbalanced friction of the slider is physically staggering the camera; making the whole camera body actually shake. Quote Link to comment Share on other sites More sharing options...
Michael Van Ostade Posted February 14, 2014 Share Posted February 14, 2014 That's not a pan. It's a bad slider shot and the unbalanced friction of the slider is physically staggering the camera; making the whole camera body actually shake. What he said Quote Link to comment Share on other sites More sharing options...
Peter Rzazewski Posted February 14, 2014 Author Share Posted February 14, 2014 Thanks guys. I understand that. I'm starting to suspect it's my computer and not the video itself. I made a short test of dolly and pan shots at different shutter rates (see vid below) and when I watch this video on my computer, the footage jitters/jumps/almost skips slightly at all the shutter rates. But then when I viewed the video on my iphone from vimeo, it didn't appear to have this problem anymore. Not sure what's going on but it's frustrating to review/edit video without seeing it play properly. Anyone have any insight into this? https://vimeo.com/86661352 Quote Link to comment Share on other sites More sharing options...
HurtinMinorKey Posted February 14, 2014 Share Posted February 14, 2014 It's a combination of an unsmooth pan and judder from panning too fast for the distance to your subject. Explanation here: http://kb2.adobe.com/community/publishing/908/cpsid_90843.html See the "seven second rule" Peter Rzazewski 1 Quote Link to comment Share on other sites More sharing options...
fuzzynormal Posted February 14, 2014 Share Posted February 14, 2014 it's my computer and not the video itself. Don't use ML for a round of tests. Go back to the OEM firmware. Shoot 24p and then 60p or 60i. Watch what happens during playback of those files directly from the CF card. BTW, your shutter speed on the camera is irrelevant to the issue. Overloading the data rate with a firmware hack can cause dropped frames. I did this on occasion with my old GH1. A good SD card could handle the higher data rate, but using slower cards would create issues. Quote Link to comment Share on other sites More sharing options...
fuzzynormal Posted February 14, 2014 Share Posted February 14, 2014 It's a combination of an unsmooth pan and judder from panning too fast I don't know. The stutters to my eye look too random for that. Quote Link to comment Share on other sites More sharing options...
HurtinMinorKey Posted February 14, 2014 Share Posted February 14, 2014 I don't know. The stutters to my eye look too random for that. That's because the panning is not smooth. Quote Link to comment Share on other sites More sharing options...
nigelbb Posted February 15, 2014 Share Posted February 15, 2014 Another common mistake us to have IS switched on when panning or sliding. The IS tries to correct for the motion then the movement exceeds the possible correction & thyself jumps. This happens multiple times over second hence the jittering. Quote Link to comment Share on other sites More sharing options...
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