conttime.lua: script to test continuous shooting speed

reyalp

14079

« on: 25 / November / 2016, 23:01:23 »

Advertisements

Here's a script to test shooting speed using "hold half, click shoot" method or Canon continuous. It uses the same technique as rawopint.lua, fixedint.lua and the various chdkptp shooting commands.

This script can be used to measure the maximum realistic shooting rate under different settings, SD cards, etc.

The shutter speed is fixed at 1/128, to ensure that the contribution of shutter speed doesn't vary between runs.

Review should be turned off in Canon settings, and ISO should not be AUTO since different ISO settings have different processing overhead.

Options
shots - number of shots to shoot
interval - interval between shots. The script will attempt to wait in the shoot hook (usb remote hook) to maintain this interval. If the interval is lower than the camera can sustain, the script will shoot as fast as possible
Use continuous mode - Shoot by holding the shutter down. The camera must have continuous mode enabled in the Canon UI, or it will exit with an error. If not checked, the script will hold down half shoot and click full for each shot.

Output is logged to conttime.csv in the root of the SD card.

Log columns
date - Camera date and time
exp - Camera image number
shot_ready_tick - the tick count when the camera was ready to shoot (in the remote hook)
ready_time - difference between the previous shot_ready_tick and the current. 0 for the first shot. Effectively, the time it took for the camera to be ready to shoot again.
wait_time - how long the camera waited in addition to ready_time to maintain the interval. This is how much "spare time" there at the selected interval. Negative real shooting rate is lower than the interval. 0 for the first shot.
shot_tick - the tick count at which the exposure was started (when the remote hook was allowed to continue)
raw_tick - the tick count when the raw hook was ready, meaning the exposure was complete and the sensor was read out, but before the jpeg was created and written.
raw_time - the time between shot_tick and raw_tick
info - information about the camera and settings, only logged on the first shot

Each time the script is run, a header row and a row for each shot is appended to the log. The log is only written after shooting is done, so it should not affect the shooting rate.

The main value of interest is ready_time, since this shows the approximate shooting rate the camera is able to sustain. If you set and interval, wait_time shows how much "headroom" you have while still maintaining the interval. Subtracting raw_time from ready_time can give you an idea of the jpeg processing + saving overhead.

Sample output from D10 in continuous and "hold half/click full"

Code: [Select]

date	exp	shot_ready_tick	ready_time	wait_time	shot_tick	raw_tick	raw_time	info
11/25/2016 19:25:36	591	742570	0	0	742570	743180	610	platform:d10-100a-1.5.0-4706 Oct 16 2016 15:58:11 shots:5 interval:0 cont=true
11/25/2016 19:25:37	592	743490	920	-920	743490	744100	610	
11/25/2016 19:25:38	593	744410	920	-920	744410	745020	610	
11/25/2016 19:25:38	594	745320	910	-910	745320	745920	600	
11/25/2016 19:25:39	595	746230	910	-910	746230	746840	610	
date	exp	shot_ready_tick	ready_time	wait_time	shot_tick	raw_tick	raw_time	info
11/25/2016 19:25:50	596	757170	0	0	757170	757770	600	platform:d10-100a-1.5.0-4706 Oct 16 2016 15:58:11 shots:5 interval:0 cont=false
11/25/2016 19:25:51	597	758160	990	-990	758160	758770	610	
11/25/2016 19:25:52	598	759160	1000	-1000	759160	759770	610	
11/25/2016 19:25:53	599	760150	990	-990	760150	760740	590	
11/25/2016 19:25:54	600	761140	990	-990	761140	761740	600

conttime.lua (1.99 kB - downloaded 86 times.)

Logged

Don't forget what the H stands for.

jmac698

138

Re: conttime.lua: script to test continuous shooting speed

« Reply #1 on: 20 / October / 2018, 15:44:17 »

SD1200, U1 card, Nextech 32GB:

Code: [Select]

            date exp shot_ready_tick ready_time wait_time shot_tick raw_tick raw_time info   10/20/2018 15:56:22 35 31560 0 0 31560 32290 730 platform:ixus95_sd1200-100c-1.4.1-5097 Aug 27 2018 04:06:39 shots:5 interval:0 cont=true   10/20/2018 15:56:24 36 34050 2490 -2490 34050 34750 700 
   10/20/2018 15:56:27 37 36680 2630 -2630 36680 37380 700 
   10/20/2018 15:56:29 38 39210 2530 -2530 39210 39910 700 
   10/20/2018 15:56:32 39 41610 2400 -2400 41610 42320 710 
   date exp shot_ready_tick ready_time wait_time shot_tick raw_tick raw_time info   10/20/2018 15:56:49 40 58730 0 0 58730 59440 710 platform:ixus95_sd1200-100c-1.4.1-5097 Aug 27 2018 04:06:39 shots:5 interval:0 cont=false   10/20/2018 15:56:52 41 61440 2710 -2710 61440 62150 710 
   10/20/2018 15:56:54 42 64000 2560 -2560 64000 64700 700 
   10/20/2018 15:56:57 43 66890 2890 -2890 66890 67590 700 
   10/20/2018 15:57:00 44 69640 2750 -2750 69640 70350 710

SD Card 2, U1, Lexar 16GB:

Code: [Select]

            date exp shot_ready_tick ready_time wait_time shot_tick raw_tick raw_time info   10/20/2018 15:58:03 45 19320 0 0 19320 20040 720 platform:ixus95_sd1200-100c-1.4.1-5097 Aug 27 2018 04:06:39 shots:5 interval:0 cont=true   10/20/2018 15:58:06 46 22390 3070 -3070 22390 23090 700 
   10/20/2018 15:58:08 47 24770 2380 -2380 24770 25470 700 
   10/20/2018 15:58:10 48 27050 2280 -2280 27050 27750 700 
   10/20/2018 15:58:13 49 29440 2390 -2390 29440 30140 700 
   date exp shot_ready_tick ready_time wait_time shot_tick raw_tick raw_time info   10/20/2018 15:58:26 50 42330 0 0 42330 43040 710 platform:ixus95_sd1200-100c-1.4.1-5097 Aug 27 2018 04:06:39 shots:5 interval:0 cont=false   10/20/2018 15:58:28 51 44710 2380 -2380 44710 45420 710 
   10/20/2018 15:58:30 52 47270 2560 -2560 47270 47970 700 
   10/20/2018 15:58:33 53 49620 2350 -2350 49620 50320 700 
   10/20/2018 15:58:35 54 52240 2620 -2620 52240 52940 700

In other words, 2.65s each for card1 and 2.40s each for card2
That's 1358 and 1500 shots/hour

« Last Edit: 20 / October / 2018, 16:33:29 by jmac698 »

Logged

c_joerg

1248

Re: conttime.lua: script to test continuous shooting speed

« Reply #2 on: 22 / October / 2018, 10:12:31 »

Quote from: reyalp on 25 / November / 2016, 23:01:23

This script can be used to measure the maximum realistic shooting rate under different settings, SD cards, etc.

Two things to consider:

Quote from: reyalp on 25 / November / 2016, 23:01:23

The shutter speed is fixed at 1/128, to ensure that the contribution of shutter speed doesn't vary between runs.

The maximum speed depends on the size of the RAW / JPG files. For the M3, the RAW files vary between 18 and 32MB. In a totally underexposed picture you get to about 18MB. The same thing happens in a totally overexposed picture. So you should make sure that in these images, the exposure is about right. Also, the objects should contain many structures.

Some cameras contain an internal buffer. This takes up about 5 RAW and 25 JPG files in the M3. To come to a reasonable conclusion, you should therefore be well above the buffer size. The following plot of the M3 shows quite clearly (RAW files) that the interval of the first recordings is very short and then increases. This is independent from the SD Card.

EOS_M3_continuous_mode.jpg (76.68 kB, 1200x901 - viewed 71 times.)

Logged

M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
YouTube https://www.youtube.com/channel/UCrTH0tHy9OYTVDzWIvXEMlw/videos?shelf_id=0&view=0&sort=dd

c_joerg

1248

Re: conttime.lua: script to test continuous shooting speed

« Reply #3 on: 22 / February / 2019, 14:38:50 »

If have a new SD Card Sandisk Extrem PRO for M3.
CHDK benchmark RAW Write goes to 68400 Kb/s.
The normal Sandisk Extrem has 52000 Kb/s

Code: [Select]

Sandisk Extrem

date,exp,shot_ready_tick,ready_time,wait_time,shot_tick,raw_tick,raw_time,info
02/22/2019 20:20:34,2453,67700,0,0,67700,67940,240,platform:m3-101a-1.5.0-5102 Sep 23 2018 09:18:55 shots:15 interval:0 cont=true
02/22/2019 20:20:35,2454,67970,270,-270,67970,68250,280,
02/22/2019 20:20:35,2455,68280,310,-310,68280,68540,260,
02/22/2019 20:20:35,2456,68570,290,-290,68570,68810,240,
02/22/2019 20:20:36,2457,68870,300,-300,68870,69110,240,
02/22/2019 20:20:36,2458,69320,450,-450,69320,69580,260,
02/22/2019 20:20:37,2459,69910,590,-590,69910,70180,270,
02/22/2019 20:20:37,2460,70510,600,-600,70510,70780,270,
02/22/2019 20:20:38,2461,71120,610,-610,71120,71380,260,
02/22/2019 20:20:38,2462,71720,600,-600,71720,71980,260,
02/22/2019 20:20:39,2463,72310,590,-590,72310,72570,260,
02/22/2019 20:20:40,2464,72900,590,-590,72900,73170,270,
02/22/2019 20:20:40,2465,73490,590,-590,73490,73750,260,
02/22/2019 20:20:41,2466,74080,590,-590,74080,74340,260,
02/22/2019 20:20:41,2467,74670,590,-590,74670,74930,260,

Sandisk Extrem PRO

date,exp,shot_ready_tick,ready_time,wait_time,shot_tick,raw_tick,raw_time,info
02/22/2019 20:22:58,2468,35480,0,0,35480,35720,240,platform:m3-101a-1.5.0-5102 Sep 23 2018 09:18:55 shots:15 interval:0 cont=true
02/22/2019 20:22:59,2469,35750,270,-270,35750,36030,280,
02/22/2019 20:22:59,2470,36060,310,-310,36060,36330,270,
02/22/2019 20:22:59,2471,36360,300,-300,36360,36600,240,
02/22/2019 20:22:59,2472,36660,300,-300,36660,36900,240,
02/22/2019 20:23:00,2473,36980,320,-320,36980,37240,260,
02/22/2019 20:23:00,2474,37490,510,-510,37490,37760,270,
02/22/2019 20:23:01,2475,37900,410,-410,37900,38160,260,
02/22/2019 20:23:01,2476,38410,510,-510,38410,38680,270,
02/22/2019 20:23:02,2477,38820,410,-410,38820,39080,260,
02/22/2019 20:23:02,2478,39330,510,-510,39330,39600,270,
02/22/2019 20:23:02,2479,39730,400,-400,39730,40000,270,
02/22/2019 20:23:03,2480,40250,520,-520,40250,40510,260,
02/22/2019 20:23:04,2481,40770,520,-520,40770,41030,260,
02/22/2019 20:23:04,2482,41170,400,-400,41170,41450,280,

Logged

M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
YouTube https://www.youtube.com/channel/UCrTH0tHy9OYTVDzWIvXEMlw/videos?shelf_id=0&view=0&sort=dd