Comments (26)
htruong
commented on May 29, 2024
You can access the camera root prompt:
After logginfg in with root, you can type something like this:
/usr/bin/v4l2-ctl -c auto_exposure_bias=15
/usr/bin/v4l2-ctl -c contrast=0That should be enough to improve the brightness. To see all the tweakable parameters, you can list it
/usr/bin/v4l2-ctl -L | lessPlease report back what values worked for you!
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PSF1
commented on May 29, 2024
Thanks, I will try and then comment :)
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PSF1
commented on May 29, 2024
I get this quality, I think that it's not the best one, but I don't know anything about photography. :_ D
When I try to set "Codec Controls" I cant with:
# /usr/bin/v4l2-ctl -c h264_level=0
VIDIOC_S_EXT_CTRLS: failed: No such process
h264_level: No such process
Is it possible, or necessary, to modify those values?
This is my settings:
User Controls
brightness 0x00980900 (int) : min=0 max=100 step=1 default=50 value=50 flags=slider
contrast 0x00980901 (int) : min=-100 max=100 step=1 default=0 value=50 flags=slider
saturation 0x00980902 (int) : min=-100 max=100 step=1 default=0 value=-40 flags=slider
red_balance 0x0098090e (int) : min=1 max=7999 step=1 default=1000 value=1000 flags=slider
blue_balance 0x0098090f (int) : min=1 max=7999 step=1 default=1000 value=1000 flags=slider
horizontal_flip 0x00980914 (bool) : default=0 value=0
vertical_flip 0x00980915 (bool) : default=0 value=0
power_line_frequency 0x00980918 (menu) : min=0 max=3 default=1 value=3
0: Disabled
1: 50 Hz
2: 60 Hz
3: Auto
sharpness 0x0098091b (int) : min=-100 max=100 step=1 default=0 value=100 flags=slider
color_effects 0x0098091f (menu) : min=0 max=15 default=0 value=0
0: None
1: Black & White
2: Sepia
3: Negative
4: Emboss
5: Sketch
6: Sky Blue
7: Grass Green
8: Skin Whiten
9: Vivid
10: Aqua
11: Art Freeze
12: Silhouette
13: Solarization
14: Antique
15: Set Cb/Cr
rotate 0x00980922 (int) : min=0 max=360 step=90 default=0 value=0 flags=modify-layout
color_effects_cbcr 0x0098092a (int) : min=0 max=65535 step=1 default=32896 value=32896
Codec Controls
video_bitrate_mode 0x009909ce (menu) : min=0 max=1 default=0 value=0 flags=update
0: Variable Bitrate
1: Constant Bitrate
video_bitrate 0x009909cf (int) : min=25000 max=25000000 step=25000 default=10000000 value=25000000
repeat_sequence_header 0x009909e2 (bool) : default=0 value=0
h264_i_frame_period 0x00990a66 (int) : min=0 max=2147483647 step=1 default=60 value=60
h264_level 0x00990a67 (menu) : min=0 max=11 default=11 value=11
0: 1
1: 1b
2: 1.1
3: 1.2
4: 1.3
5: 2
6: 2.1
7: 2.2
8: 3
9: 3.1
10: 3.2
11: 4
h264_profile 0x00990a6b (menu) : min=0 max=4 default=4 value=4
0: Baseline
1: Constrained Baseline
2: Main
4: High
Camera Controls
auto_exposure 0x009a0901 (menu) : min=0 max=3 default=0 value=0
0: Auto Mode
1: Manual Mode
exposure_time_absolute 0x009a0902 (int) : min=1 max=10000 step=1 default=1000 value=1000
exposure_dynamic_framerate 0x009a0903 (bool) : default=0 value=1
auto_exposure_bias 0x009a0913 (intmenu): min=0 max=24 default=12 value=15
0: -4000 (0xfffffffffffff060)
1: -3667 (0xfffffffffffff1ad)
2: -3333 (0xfffffffffffff2fb)
3: -3000 (0xfffffffffffff448)
4: -2667 (0xfffffffffffff595)
5: -2333 (0xfffffffffffff6e3)
6: -2000 (0xfffffffffffff830)
7: -1667 (0xfffffffffffff97d)
8: -1333 (0xfffffffffffffacb)
9: -1000 (0xfffffffffffffc18)
10: -667 (0xfffffffffffffd65)
11: -333 (0xfffffffffffffeb3)
12: 0 (0x0)
13: 333 (0x14d)
14: 667 (0x29b)
15: 1000 (0x3e8)
16: 1333 (0x535)
17: 1667 (0x683)
18: 2000 (0x7d0)
19: 2333 (0x91d)
20: 2667 (0xa6b)
21: 3000 (0xbb8)
22: 3333 (0xd05)
23: 3667 (0xe53)
24: 4000 (0xfa0)
white_balance_auto_preset 0x009a0914 (menu) : min=0 max=10 default=1 value=1
0: Manual
1: Auto
2: Incandescent
3: Fluorescent
4: Fluorescent H
5: Horizon
6: Daylight
7: Flash
8: Cloudy
9: Shade
10: Greyworld
image_stabilization 0x009a0916 (bool) : default=0 value=0
iso_sensitivity 0x009a0917 (intmenu): min=0 max=4 default=0 value=0
0: 0 (0x0)
1: 100000 (0x186a0)
2: 200000 (0x30d40)
3: 400000 (0x61a80)
4: 800000 (0xc3500)
iso_sensitivity_auto 0x009a0918 (menu) : min=0 max=1 default=1 value=1
0: Manual
1: Auto
exposure_metering_mode 0x009a0919 (menu) : min=0 max=2 default=0 value=2
0: Average
1: Center Weighted
2: Spot
scene_mode 0x009a091a (menu) : min=0 max=13 default=0 value=0
0: None
8: Night
11: Sports
JPEG Compression Controls
compression_quality 0x009d0903 (int) : min=1 max=100 step=1 default=30 value=10
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PSF1
commented on May 29, 2024
How can I permanent changes? After reboot, it's reset.
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htruong
commented on May 29, 2024
I am going to work on the facility to allow you to save the webcam settings.
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kmalinich
commented on May 29, 2024
I'm using this camera which has the original 5MP Raspberry Pi camera sensor, and I had to set the auto exposure bias to 9, but then it looked pretty nice.
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tamis-laan
commented on May 29, 2024
You can access the camera root prompt:
After logginfg in with root, you can type something like this:
/usr/bin/v4l2-ctl -c auto_exposure_bias=15 /usr/bin/v4l2-ctl -c contrast=0That should be enough to improve the brightness. To see all the tweakable parameters, you can list it
/usr/bin/v4l2-ctl -L | lessPlease report back what values worked for you!
Any reason these settings cannot be exposed to the client?
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htruong
commented on May 29, 2024
No, it is just I haven't had time to bake in the ability to set those parameters somewhere.
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tamis-laan
commented on May 29, 2024
I see, well I'm waiting for my HQ camera to arrive, any way I can help you get this done? Any pointers where to look/start?
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PSF1
commented on May 29, 2024
I can help too :_ D
How can we expose the parameters?
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htruong
commented on May 29, 2024
I think the general direction will be to expose a new file with tweakable parameters laid out so the users and freely change and save it. To achieve that:
- Mount the
/bootpartition on startup (fix/etc/fstab). - Read a file say
/boot/camera.txtand apply each parameter before running thestart-webcam.shscript.
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tamis-laan
commented on May 29, 2024
This would be to change the default settings? But I assume there should also be some way to change the settings from a menu in the operating system (through driver configuration)?
If you are exposing a config file it would also be an idea to be able to set wifi settings, this way it could also function as an IP camera at the same time.
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kmalinich
commented on May 29, 2024
@tamis-laan this is a buildroot setup with the wifi intentionally disabled to keep it as lightweight as possible, adding wifi back to it would kind of go against that..
@htruong if you used something like /boot/camera.cfg as a shell-sourceable file with variables in it (i.e. CAMERA_CONTRAST=55, you could source it from start-webcam.sh or multi-gadget.sh, and in one of those, do something like /usr/bin/v4l2-ctl -c "contrast=${CAMERA_CONTRAST-50}" which would use the ${CAMERA_CONTRAST} value from /boot/camera.cfg if it was present, but would use a value of 50 otherwise. Then it would be easily editable by any machine that can read the FAT /boot partition.
If you wanted to go overboard you could include some other forms of sanity checks on the values, but without a way to output the result of those checks, it might be a moot point, and therefore the responsibility of the user to not put something like CAMERA_CONTRAST=1000000 or CAMERA_CONTRAST=jdjjdila in /boot/camera.cfg (which IMO is totally fine - if the user can't handle that, they can buy a Logitech USB webcam or something)
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htruong
commented on May 29, 2024
@tamis-laan @kmalinich I can add the wifi + a lightweight server to configure the camera, but that will take some time. I don't think it will make the image much larger, and perhaps we can disable it by default so we don't have to worry about security.
My camera was busted in the last two weeks because the ribbon cable just got bent too much and the camera died while I was using it and I couldn't figure out what was defective. I am working on the issue now as I got another one shipped to me and my setup is working again!
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htruong
commented on May 29, 2024
Would someone help me test this build https://github.com/showmewebcam/showmewebcam/releases/tag/V1.30-preview
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tuyenld
commented on May 29, 2024
@htruong
I tried to create camera.txt, but it seems the boot partition is Read-Only
# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 30.9M 30.9M 0 100% /
devtmpfs 193.9M 0 193.9M 0% /dev
tmpfs 198.2M 0 198.2M 0% /dev/shm
tmpfs 198.2M 2.8M 195.4M 1% /run
tmpfs 198.2M 0 198.2M 0% /sys/fs/cgroup
tmpfs 198.2M 2.8M 195.4M 1% /etc/machine-id
tmpfs 198.2M 0 198.2M 0% /tmp
tmpfs 64.0M 152.0K 63.9M 0% /var
/dev/mmcblk0p1 31.9M 9.4M 22.6M 29% /boot
# mount | grep mmcblk0p1
/dev/mmcblk0p1 on /boot type vfat (ro,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,errors=remount-ro)
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htruong
commented on May 29, 2024
@tuyenld Sorry I forgot to mention how can you actually do it -- you have two choices:
- Modify the file in the
bootpartition on your computer. - Connect via the ttyACM interface and remount the
bootpartition read-write:
mount -o remount,rw /boot
Then you'll be able to edit the file (use vi, it's a pain in the neck sorry), then reboot.
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tuyenld
commented on May 29, 2024
@htruong
I tested with Pi Zero W + v1 5M Camera. It worked now!!!
New auto_exposure_bias was applied after reboot.
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tamis-laan
commented on May 29, 2024
I'm will be receiving the last camera components tonight and will give v1.3 a test run.
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PSF1
commented on May 29, 2024
I created the camera.txt file in /boot and work ok, but if we write a line with spaces around equal fail to read the file or that option. Something like this fail:
contrast = 0
but with this work ok:
contrast=0
I try adding blank lines and comments with '#' and work ok.
I will write now a file with the default options and comments to put it in the img file if you want it. I forked this repository but I don't know where to put the file. :_ D
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PSF1
commented on May 29, 2024
This is a default file that describe settings, with options and limits.
default camera.txt
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Fernyman79
commented on May 29, 2024
I've tried to test this, but I can't mount the /boot partition. I get the following:
mount: /boot: mount point does not exist.
Also, adding a camera.txt by mounting the SD card doesn't work for me. Upon booting the PI, the settings don't make any effect. Client OS is macOS.
Any thoughts?
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htruong
commented on May 29, 2024
Hey @Fernyman79 that doesn't sound right. Are you sure you're running https://github.com/showmewebcam/showmewebcam/releases/tag/V1.30-preview ? Can you show me what it says in:
cat /etc/fstabWhile you're logged to the ttyACM interface? If it has an entry for /boot then you're good, otherwise I think your image hasn't been written correctly to the sd card.
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htruong
commented on May 29, 2024
Let's try the new preview version, it'll have more debugging info:
https://github.com/showmewebcam/showmewebcam/releases/tag/v1.30-preview2
If your settings are not applied correctly, try to issue this command on the ttyACM debug interface and paste here:
journalctl -t piwebcamfrom showmewebcam.
Fernyman79
commented on May 29, 2024
I got it to work. I was using the raspberry pi imager to write the SD card. Tried with etcher and it worked. @htruong your comment about my card not being written correctly tipped me. Thanks for the help!
Now that this is working, I have noticed that the camera framing is pretty close in/zoomed in. I'll open another issue, sine it's unrelated.
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htruong
commented on May 29, 2024
Thanks, everyone for testing and reporting bugs!
@PSF1 now we can handle the spaces in the settings file.
V1.30 is identical to V1.30-preview2.
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