Originally posted by Steelski Movie modes.
9MB per second for maximum file size.
7 MB per second for 720p
Originally posted by and Am a bit sceptical to motion jpeg as the codec.
I analyszed the figures a bit and posted in the K-7 video quality thread
https://www.pentaxforums.com/forums/603675-post290.html
Let me copy it here as well for easier reference:
Movie (All AVI/MJPEG at 30 fps):
format *quality* "duration until 4GB full" -> MBit/s data rate / "kByte/image frame"
1536 x 1024p *** 7:23 ->
74.0 / 316
1536 x 1024p ** 10:22 -> 52.7
1536 x 1024p * 14:40 -> 37.2
1280 x 720p *** 9:26 ->
57.9 / 247
1280 x 720p ** 13:19 -> 41.0
1280 x 720p * 18:37 -> 28.4
640 x 416p *** 31:55 -> 17.1 / 73
640 x 416p ** 41:44 -> 13.1
640 x 416p * 60:57 -> 9.0 / 38
74.0 MBit/s or 9.2 MByte/s is twice the data rate of a Canon 5Dmk2, so far industry's best. Quality would be comparable, because of MJPEG vs. H.264.
Motion JPEG is fine because it is free from motion compression artifacts and easier to postprocess. Most MJPEG codecs use a aggressive frame compression. Not Pentax. ~300 kByte per image is good (***) JPEG compression quality.