Use ffmpeg to convert V4L2 data into rawvideo data and pipe that to mpv. This
lets us use mpv's rawvideo demuxer which is instant for transpose / rotation.
Removes the X handling of rotation.
- Take pictures by pressing "s" when the preview opens.
- Depends on sxmo_autorotate.sh
- movie is not currently working. See comments in code
- uses sxiv for image previews of photos taken during that photoshoot
- TODO: use sxiv keyhandlers to add a delete photo function
- See: /usr/share/examples/sxiv/key-handler
- I dont know how we would distribute this