Change Framerate on the Fly/Digital Hand-Cranked Camera

[fraeppchen]

Hi!

i'm doing research for building a digital hand-cranked camera.
The idea is to add the question of time control to the possibilities of the camera-person, not the editor (who does not actually experience the scene).
To do it i look for a way to externally adjust the captured framerate on the fly from 1fps up to at least 50fps but to store a video in constant 25fps.

So far the closest i found  about it was a post in this forum:
http://www.magiclantern.fm/forum/index.php?topic=2963.0

Actually i would prefer to use a Gopro (ok, now i will be kicked out the forum) because of the higher framerate, but the hacks for GoPro didn't seem as promising as the feature mentioned above, actually some people who were working on a Genlock for the GoPro told me that the sonsor would only support some predestined frames rates.

So now my question. Do you think it is generally possible to implement a feature like this (in the best case for the 600D)? and to externally control it (for example with signals from an arduino)? Do you have ideas how to get there?






 

[a1ex]

Since the backend (FPS ramping) is already working, I guess you simply want to improve the user interface using an external device (joystick, rotary knob or whatever), correct?

In this case, an Arduino connected via USB should do the trick. There are some PTP functions in ML, though it's been years since I've touched them.

Found a thread here as well: http://forum.arduino.cc/index.php?topic=125318.0