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Messages - Meloware

#26
Thank you for the suggestions. I fear the bottleneck is truly the camera. I might consider buying the T6i, which supports the faster SD cards, but there is no ML build to support it. I am not buying another camera, unless I am able to use it for my intended purpose.

I thought about using the LED and a photodiode. It would be awkward, but I could build the electronics and logic for that. I didn't realize my camera has a 'beep'. I have done some coding, but haven't investigated ML, so don't know if I could modify it or not. A standard SD memory can make its initial saves in about 3.5 seconds, for a DNG image. Eventually it needs up to 6 or more seconds. A 'camera ready' status signal will help, but still wouldn't allow me to record 100 frames per minute.

MLV? Is that available in 'Silent Picture' mode? How would I control how and when an exposure is taken? I am triggering the 'half shutter' signal, with my controller board. Coding makes my brain hurt, but if ML could be modified to record MLV, in Silent Picture mode, using the half shutter signal, I would consider it. Is there any resolution or quality loss, as compared to the DNGs I get now, in Hi-Res mode?

I appreciate the suggestions, but I fear that 30MB images are simply going to take this long with standard speed SDs. The 650D doesn't support the faster memories.
BTW, is there a 'dead pixel' removal utility anywhere that will operate on your DNGs? That is a filter I need, and nothing I have tried seems to work.
#27
I am getting some wonderful results in my effort to capture 16mm movies using Magic Lantern and my T4i (650D). The camera's shutter mechanism would quickly wear out if cycled for each film frame. Magic Lantern's Silent Picture raw mode solved the problem I had with using my camera. I am now able to take many tens of thousands of pictures, without using the shutter mechanism.
I have a modified 1970s Bell & Howell projector. The original projection lamp, fan, motor and lens, were removed. I added my own optics, a stepping motor (with a $10 Chinese motor controller) and LED illumination to project images directly on my camera's sensor. The camera and projector are automated by a circuit board controller of my own design.
Managing a 31 megabyte DNG file for each movie frame is very demanding on memory and hard disc storage. The worst issue is dealing with the write speed of SD camera memories slowing down as they fill. It is practically possible to only capture 5 or 6 frames a minute. It takes days to transfer a single 10 minute reel of film. It might be faster, if I could get a "camera ready" signal out of my Canon, once it's able to take the next picture. This bottleneck is sad, but it is still possible to do great work.
Please allow me to share the results of using Magic Lantern. Notice the first 4 videos.
http://industrialhistory.org/education/videos/

Chris (Meloware)
Museum of Our Industrial Heritage, Greenfield Massachusetts, USA
http://industrialhistory.org


// Adding the first video here.  Audionut.