I mounted my GoPro Hero2 to the top of my 3DR frame using the standard mount and the resulting video was unusable- complete jello. So then I used tripod adapter with the camera and a 1/4-20 bolt to the top and still had unusable jello in the video.
Is anyone flying a hardmounted GoPro successfully on a 3DR frame? If so, how do you have it mounted and have you applied any tricks to create stable video.
That is the weak point of GoPro, When we shoot on HD, the jello is really killing. We lost a job because of it.
1. Have you tried shooting on normal (non HD)mode? It seems better with less jello.
2. Make sure you use the correct SD card for it. You have to use SD cards that is rated at 4 or higher.
I would say you need to
1. Make your frame / setup as vibration free as possible (props, motors)
2. Find a way to isolate the camera from the remaining vibrations. Maybe using gel pads, foam, rubberbands, O-rings. Whatever works...
And to I have not tried myself yet on the 3DR, first I have to get it fly well without the GoPro :) And I am not there yet.
Welcome to the wobbly world of the rolling shutter. I use a HD Hero on my Caterham which subjects it to plenty of jello-inducing vibration. I find that getting the mount as rigid as possible, then using 60fps 720p rather than the 30fps modes really helps as the raster scan rate is twice as fast, so the relative deflection is half as strong.
The idea behind the rigid mount is that the frame can add stability to the camera in much the same way as a steadicam sled. In a soft mount scenario you risk inducing resonance of the partially free-to-move camera. Sometimes the resonant frequency is out of band, so not excited, or the damping you use (e.g. gel blocks) might be efficient enough to damp the motion, but it's hit and miss.
mount it on a piece of foam from a hard case or something like that, then use rubber bands to hold it down. Dont tape it or hard mount it, the tape will transfer vibes easily.
Also, try buying some moongel at your local music store on amazon, it is the same stuff as those old sticky hands you used to get from vending machines as a kid.
It eliminated vibes
You can also try to buy silicone mold for a few dollars in every stores. Then cut some washers and put them between your motors and your frame to reduce vibration.
I'm planning to do it but not tested yet :-)
Rolling Shutter and Jello is only the symptom of the problem.
The problem as Tomas pointed out is actually vibration. You can get anti vibration stand offs that fit on the arducopter stand offs from a mikrokopter shop, as its standard to have the camera gimbal and control board on the anti vibration mounts.
Secondly prop and motor balancing is so important in reducing vibration. And unbalanced motor or unbalanced props creates a lot of vibration in the frame.
On my Mikrokopter I found only leg vibrating in the hover, I then discovered that one motor didn't spin completely silent when I spun the prop by hand, the rest of the motors were dead silent. When I replaced the motor, the vibration went away. I now only get jello when my camera is zoomed in at between 10 to 20x zoom.
You can also try adding extra damping inside your GoPro casing.Cut a thin pieces of sponges n place it up,down,left and right. It works on mine.
I have my GoPro Hero 2 hard-mounted on the bottom of my standard Arducopter 3DR frame.
I used the mount plate from the plexiglass-box where it has been shipped with. I use nothing but the standard housing of the Hero2 and good PID settings, balanced props and medium timings on the ESC's.
With this settings I do not have any shutter/jello problems.
What I have found that helps is to use a polarizing filter like the one from rage cams ( no I have no affiliation with them)
By cutting down the light it not only adds color and depth tot he shots but with the cmos sensor it helps with the jello.
Hope that helps.
("credentials, 20 years pro videographer)
What gimbals are people using for the GoPro, if any? I'm completing my 3DR quad build and want to make it into an aerial photo platform... Thanks!
Check out the videos I have posted. I can send you some pics of my mounting set-up.
What GoPro are you using? Original, HD or HD2? Do you have the lastest camera firmware?