Hey guys I have strange behavior (channel gain or channel black/white level changes in time, within some range and then stops) when recording in 3K crop_rec mode (5D3 firmware 1.1.3). Here is the sample MLV link (https://drive.google.com/file/d/1uwgsc43xmp9ILnNPZjCMWgAbjcKaHHPn/view?usp=sharing).
Reproduce like this:
Use crop rec with raw recording (I used 2880 width with 2.35 aspect for continuous recording). Record small clip, check, all must be fine. Then use 10x magnification to focus on something. Switch back to 1x mode (ML slow preview) and record again about a 30 seconds.
@a1ex: I guess this footage can not be recovered fully right?
The histogram changes dramatically on blacks and shadows side.
Very interesting; in particular, the defect appears progressively *after* recording starts...
Clean video mode switching is pretty difficult to figure out...
I guess not quite from the start. I cut 200 frames from the beginning with mlv_dump.
Or maybe this effect is not noticeable from the beginning and after about 230 frames it is starting to be noticeable, then changes quite rapidly until it is unnoticeable again after about 350 frames.
Long shot but maybe related to this issue?
https://www.magiclantern.fm/forum/index.php?topic=22818.msg207853#msg207853
Some news about topic. Raw buffer height is different. I guess it is a result of going into 10x zoom and returning to normal (buffer changed but has not reset)
Note: I have not touched any registers or anything else. The build versions are in the MLV VERS header
Corrupted VariGain MLV: Link (https://drive.google.com/open?id=1h5Ptg5rW0Xuy8Vpxsx7lAW7r5ZxvVDRv)
Block: RAWI
Offset: 0x00000034
Number: 1
Size: 180
Time: 1.549000 ms
Res: 2880x1226
raw_info:
api_version 0x00000001
height 1350
width 3224
pitch 5642
frame_size 0x007438BC
bits_per_pixel 14
black_level 2047
white_level 16200
active_area.y1 30
active_area.x1 146
active_area.y2 1350
active_area.x2 3224
exposure_bias 0, 0
cfa_pattern 0x02010100
calibration_ill 1
Normal MLV: Link (https://drive.google.com/open?id=1mBUmspTu21PeZsKoE_Wl1gPaJmGiJvR_)
Block: RAWI
Offset: 0x00000034
Number: 1
Size: 180
Time: 0.744000 ms
Res: 2880x1226
raw_info:
api_version 0x00000001
height 1950
width 3224
pitch 5642
frame_size 0x00A7E02C
bits_per_pixel 14
black_level 2047
white_level 16200
active_area.y1 30
active_area.x1 146
active_area.y2 1950
active_area.x2 3224
exposure_bias 0, 0
cfa_pattern 0x02010100
calibration_ill 1