Recording with a preset isn't benchmarking. Recordings will probably show the same but the hacks will allow for longer or continuous shooting.
Thanks. Will try this.
5.2k 1x3 recording using the current ML version without hacks on, the recording time is 1-2 seconds with global draw on, 20 seconds with global draw off.
With the three hacks on, the recording time is more than 1 minutes with global draw on, most time indicator is orange, sometimes is red. Now it is already 7 minutes recording time. With global draw off, the indicator is green, the recording time is more than 1 minutes, manually terminated. So it is continuous.
So 1-minute benchmark does not reflect the true improvement. Thanks Dan and Bil. It is a great achievement.
I think that now 650D is an APS-C 5K raw camera with hardware compression ratio of 3. Although software compression may have better recovery with smart algorithms, 650D 5.2k 1x3 footage very possibly will stack against other raw cameras' 5K footage at a compression ratio of 12 or even 8 or 6.
Cheers,
Update
For an indoor relatively dark scene, ISO 1600:
1. 5.2k 1736x2214 1x3 10 bit 14bit lossless, global draw off, recording indicator mostly orange, sometimes green, recording speed 75 MB/s, 1-2% idle, recorded more than 10 minutes, manually terminated. I consider this continuous. With global draw on, the recording time is about 3 seconds. I think 1736x1950 AR 2.67 will be continuous with global draw on. Will test it later. Update: It is green, one minute recording, terminated manually. Continuous.
2. UHD 1X3 14 bit color depth 14 bit lossless, global draw off, recording indicator orange, recording speed 70 MB/s, idle time gradually increase from 100 ms to 900 ms after 5 minutes recording, manually terminated. I consider this continuous. With global draw on, it is continuous also.
3. 3K 1x1 10 bit color depth 14 bit lossless, AR 2.67, global draw off, recording indicator green, recording speed 72.5 MB/s, 2% idle, continuous. AR 2.4, recording indicator red to orange, recording speed 79 - 80 MB/s, 1% idle, more than 1 minutes, sometimes more than 5 minutes, scene dependent, stopped automatically.
Thus, all these three modes are robustly continuous even in challenging scenes. If the three hacks prove no serious side effects, these modes can be used in practice fairly stably.
Update:
For a scene composed of several tree with dense green leaves, a parking lot with several cars, a gate with iron fences
during the sunny noon at ISO 100
using a EFS lens 10-18 IS at 10 mm, IS on, AF off
UHD 1X3 14 bit color depth 14 bit lossless LJ92 compression records at 80 MB/s.
With global draw always on, the recording time is about 3 seconds. However, if push the info button to enter the user interface 2, where I typically change the shutter speed here, the indicator is orange to green, continuous recording. It is almost like with global draw off.
Thus,
I rate the Canon 650D ML as a raw news camera with the following specs:
14 bit 4K raw with a hardware compression ratio of 3
35mm/4-3 sensor size
continuous at ISO 100
If using a preset to reserve high dynamic range in MLV App, the dr may reach 12 stops.
This Canon 650D ML is an Arri Amira mini disguised, at the cost of 1%.
The same setting at late evening, needs ISO 1600, F 4.5, shutter speed 30, still a little bit dark. The writing speed is about 72 MB/s for 14 bit color depth.
Therefore, 14 bit UHD 1X3 AR 16-9 is usable most of the time in the user interface 2. For some extreme cases like late afternoon when the writing speed is over 82 MB/s, 12 bit can be used, which cuts the writing speed to 75 MB/s, and continuous.
Personally I settle on 12 bit color depth UHD 1X3 AR 16-9. This bit rate generates 75 MB/s peak data stream, plus 5 MB/s global draw, still less than the current 82 MB/s limit. I like the global draw very much and want to operate everything in user interface 1 with global draw on.
Update
The same set up as above, 12 bit UHD, handheld, 90 seconds footage, processed in MLV App with default setting, export to mp4. The footage has no first frame corruption, no pink or corrupted frame in duration. The dynamic range is good. The sharpness is acceptable. It seems to me that 650D UHD 1X3 12 bit mode can be used for run and gone news shooting safely.
Update
The same set up as above
1. 5.2K 1X3 1736X2272 10 bit 24 fps
AR 2.35, writing speed 78 MB/s, continuous global draw off, <3 seconds global draw on;
AR 2.39, writing speed 74 MB/s, continuous global draw off, 10-30 seconds global draw on;
AR 2.67, writing speed 65 MB/s, continuous global draw on.
2. 3X3 720 P 50 FPS 10 bit
AR 2.39, 1736x698, writing speed 68 MB/s, continuous global draw off, 10-30 seconds global draw on.
Update
The same set up as above.
1. 1280 1x1 mode, 1920x1280 1X1 14 bit 24 fps, writing speed 65 MB/s, continuous global draw on.
2. 1440 1x1 mode, 1920x1440 1X1 12 bit 24 fps, writing speed 65 MB/s, continuous global draw on.
3. 2.5k 1x1 mode, 1920x1280 1X1 10 bit 30 fps, writing speed 65 MB/s, 10 seconds global draw on.
Update
3x3 60 fps 1736x586 mode, 14 bit lossless, writing speed 64 MB/s, 4 seconds, global draw on; 12 bit lossless, writing speed 56 MB/s, 4 seconds, global draw on; 11 bit lossless, writing speed 50 MB/s, 18 seconds, global draw on. Seems this mode is not optimized enough. But in real world, 10 seonds of slow motion in 24 fps is enough.
3x3 24 fps 1736x976 mode, 14 bit lossless, writing speed 44 MB/s, green, global draw on.
3x3 30 fps 1736x976 mode, 14 bit lossless, writing speed 55 MB/s, green, global draw on.
If the traditional setting of AR 16-9 plus 30 fps is required, this mode is the only way to go. The operation in this mode is very convenient and reliable, pushing set button to do auto ettr, pushing zoom in to have 5x 10x high resolution enlargement, pushing zoom out to have low resolution magic zoom during video recording, pushing info button to access 4 different user interfaces.
