70D tried a quick test.
1832@ 2.35 apsect, 24fps 10bit, could record for over 1 minute (probably continuous), the movie review but it never builds the movie because it hangs/bricks requiring battery pull and two resets to get right.
1832@ 2.35 aspect, 30fps 10bit, could record for 18s, but same hang/brick.
1832@ 2.35 aspect, 24fps 12bit, could record for 28s, but same hang/brick.
1846@ 2.35 aspect, 60fps 12bit, 3X mode on, could record for 9s, but same hang/brick.
1920@ 2.35 aspect, 24 fps 10bit, 5X zoom, could record for over 1 minute (probably continuous), two second in got a "hack error" but it kept on recording until I hit stop rec., but same hang/brick occurs. Not sure with hack error to trust the record time.
2220 @2.35 aspect, 24 fps 10bit, 5Xzoom, hack error at 0 sec kept recording over 1 minute, but when I switched to photo mode it showed 51 sec record, so I cant trust either number.
It did produce MLV files, but Mystic could not convert any MLV to DNG. This same program worked with my 600D 10/12 bit MLV files.
Will try mlv_dump on the files once I have more time.