If you download this clip (using DownloadHelper addon) & play it back using the VLC player, you can adjust the speed of playback using the "[" and "]" keys. "Jerkiness" is often caused by frames being dropped because the computer can't decode them fast enough to play these frames "on time". If your computer isn't capable of running the video at full speed, then perhaps it will run the video at 60% of full speed, in which case "jerkiness" should disappear. Note that there may be jerkiness anyway due to "beating" of the speed of movement of the items being rotated in the video compared with the frame rate of the video itself. All that having been said, there is some "jerkiness" in this particular video which remains even after it has been slowed down to 20%, so whoever made the video inadvertently dropped some frames along the way -- perhaps by converting to/from video/TV frame rates (video is 29.97 in US, 25 in Europe; movies are 24fps in most cases). Some of the worst of these jerkiness artifacts are caused by conversion of "progressive" to/from "interlaced" video using "3-2 pulldown". http://en.wikipedia.org/wiki/Three-two_pull_down Perhaps Vimeo themselves transcoded the movie & introduced these artifacts. At 09:18 AM 1/19/2015, John Edmark wrote:
Without seeing what you're seeing It's very hard to know whether the jerkiness is intrinsic to the video. May be some compression artifacts.
On 1/19/15 12:39 AM, Bill Gosper wrote:
I downloaded it. Jerkiness now looks intentionally "artsy", like timelapsed plant growth. --rwg ---------- Forwarded message ---------- From: *Jon Ziegler* <jonathan.zh@gmail.com <mailto:jonathan.zh@gmail.com>> Date: Mon, Jan 19, 2015 at 12:26 AM Subject: Re: Nice Fibonacci stuff from Edmark To: Julian Ziegler Hunts <julianj.zh@gmail.com <mailto:julianj.zh@gmail.com>> Cc: Bill Gosper <billgosper@gmail.com <mailto:billgosper@gmail.com>>, Neil Bickford <techie314@gmail.com <mailto:techie314@gmail.com>>
Well, y'all ought to tell him you like it. Bill, I'm happy for you to post to math-fun if you think folks will be interested. (JZ)
On Mon, Jan 19, 2015 at 12:23 AM, Julian Ziegler Hunts <julianj.zh@gmail.com <mailto:julianj.zh@gmail.com>> wrote:
Nor me. It's related to the Fibonacci stuff he was doing before, certainly. Very nice (and not jerky for me).
Julian
On Mon, Jan 19, 2015 at 12:38 AM, Bill Gosper <billgosper@gmail.com <mailto:billgosper@gmail.com>> wrote:
Whoa, not me! Tell math-fun. (But my playback, at least, is awfully jerky.) --Bill
On Sun, Jan 18, 2015 at 1:15 PM, Jon Ziegler <jonathan.zh@gmail.com <mailto:jonathan.zh@gmail.com>> wrote:
Hi Julian, Bill, Neil,
This stuff from Edmark is pretty nice: http://www.theverge.com/2015/1/18/7749771/watch-3d-printed-objects-turn-into...
Any of you help him out with it?
Regards, Jon
-- John Edmark Lecturer in Design Dept. of Art & Art History Stanford University 650.564.4884 edmark@stanford.edu www.JohnEdmark.com