Rolling shutter artifacts from a CMOS video sensor is something I was aware of, but I did not realize it would be so bad from an iPhone. I mounted my iPhoen 4 to the handlebars, and the video as you can see is unusable:
I am seriously considering getting a GoPro Hero2 POV camera, but am still kind of wary of this type of video problem with the CMOS sensors, which the Heros use. All of the video examples I have seen from the Hero2 are great, and I don’t see any of this “jello video” that is common with CMOS sensors. I am wondering what technical differences exist between the iPhone sensor and the Hero2 sensor that makes the iPhone so bad, and the Hero2 so good.
Does anyone have any knowledge on the rolling shutter subject, or experienced what I am talking about? Any Hero2 users out there that have had issues with jelly video?
This could help: http://www.guthspot.se/video/deshaker.htm
(never tried but if you do, post a link please)
There is quite some post processing possible in today’s video/image processing.
I just purchased a Cateye INOU gps geo-tagged video/photo computer. I posted my first tiny video using it, plus the special carbon mount I make for the INOU, on Youtube. You can see it under username Veloflyte INOU . It’s a good camera, easy to use, simple. And Cateye has a dedicated website for all the videos that people take called InouAtlas.com . Take a look. I produce a special mount for the INOU that can be viewed on the Veloflyte website. under the Carbon Computer Mount section.
Not exactly related, but if you choose HDR mode on your iPhone and take a moving picture, it gets really weird. This is because it actually takes three images in sequence and then samples them together. Turning HDR off makes for a better picture while moving. I wonder if this is something similar while taking video?
the shutter rolls at ~60Hz, so the wobble you are seeing is most likely being caused by vibrations at 60Hz and higher. HDR would cause an issue as well, but if wobble artifacts were not present, I would think this would present as linear blur…and you are definitely seeing wobble.
How is the camera mounted to the bike? A heaver mount isolated from the bike by an elastomer would probably damp out the higher frequency vibrations and improve the image quality.