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Topics - DanoKrnac

#1
Hi,

I've been using a 600D to convert 8 mm movies to digital - with a projector with DC motor powered by arduino pwm modulation and 600D set to custom framerate of around 18 fps. However, it's time to step the game up to much higher quality frame by frame conversion.

So I've bought a cheap 70D hoping it's going to be the right camera for the job. However, I've just now realised that it doesn't support fps override function (as of 22 march 2019). That would be ok, if I could find a way to record frames on half shutter press without using mechanical shutter (ergo silent pictures) at at least 4 fps. Each frame would be triggered by a sensor on projector shutter connected via a external remote.

I've tried silent frames which with crop rec. Works nice, but the silent picture module ("single" setting) is only able to shoot at around 1 fps. That is way too slow since the slowest my PWM module can rotate the projector is 4 fps. Any slower, it stops and also, it would take hours to convert a few minute film reel.

So the question is - is there any kind of setting and modules that would get me to shoot externally triggered frames into a mlv file at a rate of at least 5 fps, or is the 70D not up to the task?

I believe, that the 5D mark III should be able to do this, but it is also three times the price. I've also looked at the 650D, 700D and 5D mkII and 6D, but I have no idea if those would be any better at what I need.

Thanks in advance for any advice.
#2
Hi,

I hope I'm not making a duplicate topic, but there is one thing that would make unbelievable difference to my conversion of 8mm movies to digital. While I know there is a frame by frame technique, it's extremely time consuming and thus expensive. So I'm using magic lantern on 600D and a variable speed arduino PWM powered film projector  to set custom framerate matching the one on projector. I record it as a normal 1080p video, since shooting it like photographs would be extremely time consuming, but, worse, would destroy the mechanical shutter after a few film reels.

I was able to get the speed steady to around 5/100s of a second but, sadly, that's not enough :(
Since this is an analog device and the state of the film varies, speed still fluctuates creating visible banding.

However there is an approach that would fix every single problem I'm having (banding, frame blending, inconsistent speed, rolling shutter blur. from vibration..) while improving the image quality and speed of the conversion drastically.

Since normal 1080p video from 600D is more than good enough quality wise for the conversion, the only thing I need to fix is to somehow sync every frame from the projector to every frame from the video. I would call this a stop-motion approach. That would, however, mean that camera would need to be externally triggered to make a frame from external source while in the end outputting a normal video.

My 15 year old Lumix camera has this function, but sadly has a terrible resolution (640x480) and no external shutter connector.

So is this even possible? If yes, is it posible to get like 10 fps or so?
Thanks for any kind of feedback