Add mcraw input file format

[tlenke]

This PR adds support for the mcraw file format.

The mcraw file format is created by MotionCam Pro (https://www.motioncamapp.com/), an app that runs on Android devices and allows them to capture RAW video. If you wish to try out the software, there is a free demo version available.

Only the structs required by the MLV format are used when loading an MCRAW file.

Support for this new format can potentially make MLV App available to a much larger audience.

[masc4ii]

Hej! Nice work! Is MCRAW so close to MLV? Unfortunately I can't test it, as I don't have any device supporting MotionCam around. I more thought supporting MCRAW in raw2mlv, which is the input of non-MLV RAW footage into MLVApp.

[tlenke]

Hi, if you want to try, here is a sample file:
https://storage.googleapis.com/motioncamapp.com/samples/007-VIDEO_24mm-240328_141729.0.mcraw

In terms of metadata the two formats differ a lot, but of cause the basic RAW/bayer data is the same. Surprisingly it worked very well to "fake" the mlv and fill just enough oft the mlv structs to get it working.

I'm not familiar with your suggested raw2mlv; would this enable seamless integration such as drag-and-drop and straight open?

[masc4ii]

Great! Thank you. I hope I'll find some time soon!
The integration should be better the way you realized it. raw2mlv converts all (supported by libraw) type of RAW to MLV and then you can open it in MLVApp. https://github.com/ilia3101/LibMLV/tree/master/old/programs/raw2mlv