Trying to get Labtec Webcam to work

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1

Camera: Labtec Webcam

I've got an insanely old webcam that I have lying around which I wanted to try to get to work with Octopi. It's so old, it doesn't even have autofocus.

Already tried the -y option, but it didn't work.
Also tried taking a screenshot with streamer -f jpeg -o image.jpeg , which actually worked. The picture size was only 320x240 but hey, better than no image :smiley:

lsusb:

Bus 001 Device 004: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter
Bus 001 Device 005: ID 046d:0929 Logitech, Inc. Labtec Webcam Pro
Bus 001 Device 007: ID 0bb4:0c02 HTC (High Tech Computer Corp.) Dream / ADP1 / G1 / Magic / Tattoo (Debug)
Bus 001 Device 006: ID 0424:7800 Standard Microsystems Corp.
Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

/var/log/webcamd.log

i: Desired Resolution: 640 x 480
 i: Frames Per Second.: 10
 i: Format............: JPEG
 i: TV-Norm...........: DEFAULT
 i: The specified resolution is unavailable, using: width 352 height 288 instead
 i: Could not obtain the requested pixelformat: MJPG , driver gave us: RGB3
    ... will try to handle this by checking against supported formats.
    ... Falling back to RGB24 mode (consider using -fourcc RGB24 option). Note that this requires much more CPU power
Setting FPS on the capture device is not supported, fallback to software framedropping
: Invalid argument
 i: Frame period time ......: 100 ms
Unable to map buffer: Invalid argument
Init v4L2 failed !! exit fatal
 i: init_VideoIn failed
Done bring up all configured video device

Goodbye...

Starting up webcamDaemon...

--- Configuration: ----------------------------
cfg_file:      /boot/octopi.txt
camera:        auto
usb options:   -r 640x480 -f 10
raspi options: -fps 10
http options:  -w ./www-octopi -n --listen 127.0.0.1

Explicitly USB device:
-----------------------------------------------

Found video devices:
/dev/video0
/dev/video10
/dev/video11
/dev/video12
/dev/video13
/dev/video14
/dev/video15
/dev/video16
config file='/boot/octopi.txt':USB device was not set in options, start MJPG-streamer with the first found video device: /dev/video0
<13>Nov 20 13:01:08 root: Starting USB webcam
Checking for VL805 (Raspberry Pi 4)...
  - It seems that you don't have VL805 (Raspberry Pi 4).
    There should be no problems with USB (a.k.a. select() timeout)
Running ./mjpg_streamer -o output_http.so -w ./www-octopi -n --listen 127.0.0.1 -i input_uvc.so -r 640x480 -f 10 -d /dev/video0
MJPG Streamer Version: git rev: 5554f42c352ecfa7edaec6fc51e507afce605a34
 i: Using V4L2 device.: /dev/video0
 i: Desired Resolution: 640 x 480
 i: Frames Per Second.: 10
 i: Format............: JPEG
 i: TV-Norm...........: DEFAULT
 i: The specified resolution is unavailable, using: width 352 height 288 instead
 i: Could not obtain the requested pixelformat: MJPG , driver gave us: RGB3
    ... will try to handle this by checking against supported formats.
    ... Falling back to RGB24 mode (consider using -fourcc RGB24 option). Note that this requires much more CPU power
Setting FPS on the capture device is not supported, fallback to software framedropping
: Invalid argument
 i: Frame period time ......: 100 ms
Unable to map buffer: Invalid argument
Init v4L2 failed !! exit fatal
 i: init_VideoIn failed
Done bring up all configured video device

Goodbye...

Starting up webcamDaemon...

--- Configuration: ----------------------------
cfg_file:      /boot/octopi.txt
camera:        auto
usb options:   -r 640x480 -f 10
raspi options: -fps 10
http options:  -w ./www-octopi -n --listen 127.0.0.1

Explicitly USB device:
-----------------------------------------------

Found video devices:
/dev/video0
/dev/video10
/dev/video11
/dev/video12
/dev/video13
/dev/video14
/dev/video15
/dev/video16
config file='/boot/octopi.txt':USB device was not set in options, start MJPG-streamer with the first found video device: /dev/video0
<13>Nov 20 13:01:11 root: Starting USB webcam
Checking for VL805 (Raspberry Pi 4)...
  - It seems that you don't have VL805 (Raspberry Pi 4).
    There should be no problems with USB (a.k.a. select() timeout)
Running ./mjpg_streamer -o output_http.so -w ./www-octopi -n --listen 127.0.0.1 -i input_uvc.so -r 640x480 -f 10 -d /dev/video0
MJPG Streamer Version: git rev: 5554f42c352ecfa7edaec6fc51e507afce605a34
 i: Using V4L2 device.: /dev/video0
 i: Desired Resolution: 640 x 480
 i: Frames Per Second.: 10
 i: Format............: JPEG
 i: TV-Norm...........: DEFAULT
 i: The specified resolution is unavailable, using: width 352 height 288 instead
 i: Could not obtain the requested pixelformat: MJPG , driver gave us: RGB3
    ... will try to handle this by checking against supported formats.
    ... Falling back to RGB24 mode (consider using -fourcc RGB24 option). Note that this requires much more CPU power
Setting FPS on the capture device is not supported, fallback to software framedropping
: Invalid argument
 i: Frame period time ......: 100 ms
Unable to map buffer: Invalid argument
Init v4L2 failed !! exit fatal
 i: init_VideoIn failed
Done bring up all configured video device

Goodbye...

Starting up webcamDaemon...

--- Configuration: ----------------------------
cfg_file:      /boot/octopi.txt
camera:        auto
usb options:   -r 640x480 -f 10
raspi options: -fps 10
http options:  -w ./www-octopi -n --listen 127.0.0.1

Explicitly USB device:
-----------------------------------------------

Found video devices:
/dev/video0
/dev/video10
/dev/video11
/dev/video12
/dev/video13
/dev/video14
/dev/video15
/dev/video16
config file='/boot/octopi.txt':USB device was not set in options, start MJPG-streamer with the first found video device: /dev/video0
<13>Nov 20 13:01:13 root: Starting USB webcam
Checking for VL805 (Raspberry Pi 4)...
  - It seems that you don't have VL805 (Raspberry Pi 4).
    There should be no problems with USB (a.k.a. select() timeout)
Running ./mjpg_streamer -o output_http.so -w ./www-octopi -n --listen 127.0.0.1 -i input_uvc.so -r 640x480 -f 10 -d /dev/video0
MJPG Streamer Version: git rev: 5554f42c352ecfa7edaec6fc51e507afce605a34
 i: Using V4L2 device.: /dev/video0
 i: Desired Resolution: 640 x 480
 i: Frames Per Second.: 10
 i: Format............: JPEG
 i: TV-Norm...........: DEFAULT
 i: The specified resolution is unavailable, using: width 352 height 288 instead
 i: Could not obtain the requested pixelformat: MJPG , driver gave us: RGB3
    ... will try to handle this by checking against supported formats.
    ... Falling back to RGB24 mode (consider using -fourcc RGB24 option). Note that this requires much more CPU power
Setting FPS on the capture device is not supported, fallback to software framedropping
: Invalid argument
 i: Frame period time ......: 100 ms
Unable to map buffer: Invalid argument
Init v4L2 failed !! exit fatal
 i: init_VideoIn failed
Done bring up all configured video device

Goodbye...

Starting up webcamDaemon...

--- Configuration: ----------------------------
cfg_file:      /boot/octopi.txt
camera:        auto
usb options:   -r 640x480 -f 10
raspi options: -fps 10
http options:  -w ./www-octopi -n --listen 127.0.0.1

Explicitly USB device:
-----------------------------------------------

Found video devices:
/dev/video0
/dev/video10
/dev/video11
/dev/video12
/dev/video13
/dev/video14
/dev/video15
/dev/video16
config file='/boot/octopi.txt':USB device was not set in options, start MJPG-streamer with the first found video device: /dev/video0
<13>Nov 20 13:01:15 root: Starting USB webcam
Checking for VL805 (Raspberry Pi 4)...
  - It seems that you don't have VL805 (Raspberry Pi 4).
    There should be no problems with USB (a.k.a. select() timeout)
Running ./mjpg_streamer -o output_http.so -w ./www-octopi -n --listen 127.0.0.1 -i input_uvc.so -r 640x480 -f 10 -d /dev/video0
MJPG Streamer Version: git rev: 5554f42c352ecfa7edaec6fc51e507afce605a34
 i: Using V4L2 device.: /dev/video0
 i: Desired Resolution: 640 x 480
 i: Frames Per Second.: 10
 i: Format............: JPEG
 i: TV-Norm...........: DEFAULT
 i: The specified resolution is unavailable, using: width 352 height 288 instead
 i: Could not obtain the requested pixelformat: MJPG , driver gave us: RGB3
    ... will try to handle this by checking against supported formats.
    ... Falling back to RGB24 mode (consider using -fourcc RGB24 option). Note that this requires much more CPU power
Setting FPS on the capture device is not supported, fallback to software framedropping
: Invalid argument
 i: Frame period time ......: 100 ms
Unable to map buffer: Invalid argument
Init v4L2 failed !! exit fatal
 i: init_VideoIn failed
Done bring up all configured video device

Goodbye...

Starting up webcamDaemon...

--- Configuration: ----------------------------
cfg_file:      /boot/octopi.txt
camera:        auto
usb options:   -r 640x480 -f 10
raspi options: -fps 10
http options:  -w ./www-octopi -n --listen 127.0.0.1

Explicitly USB device:
-----------------------------------------------

Found video devices:
/dev/video0
/dev/video10
/dev/video11
/dev/video12
/dev/video13
/dev/video14
/dev/video15
/dev/video16
config file='/boot/octopi.txt':USB device was not set in options, start MJPG-streamer with the first found video device: /dev/video0
<13>Nov 20 13:01:17 root: Starting USB webcam
Checking for VL805 (Raspberry Pi 4)...
  - It seems that you don't have VL805 (Raspberry Pi 4).
    There should be no problems with USB (a.k.a. select() timeout)
Running ./mjpg_streamer -o output_http.so -w ./www-octopi -n --listen 127.0.0.1 -i input_uvc.so -r 640x480 -f 10 -d /dev/video0
MJPG Streamer Version: git rev: 5554f42c352ecfa7edaec6fc51e507afce605a34
 i: Using V4L2 device.: /dev/video0
 i: Desired Resolution: 640 x 480
 i: Frames Per Second.: 10
 i: Format............: JPEG
 i: TV-Norm...........: DEFAULT
 i: The specified resolution is unavailable, using: width 352 height 288 instead
 i: Could not obtain the requested pixelformat: MJPG , driver gave us: RGB3
    ... will try to handle this by checking against supported formats.
    ... Falling back to RGB24 mode (consider using -fourcc RGB24 option). Note that this requires much more CPU power
Setting FPS on the capture device is not supported, fallback to software framedropping
: Invalid argument
 i: Frame period time ......: 100 ms
Unable to map buffer: Invalid argument
Init v4L2 failed !! exit fatal
 i: init_VideoIn failed
Done bring up all configured video device

Goodbye...

Starting up webcamDaemon...

--- Configuration: ----------------------------
cfg_file:      /boot/octopi.txt
camera:        auto
usb options:   -r 640x480 -f 10
raspi options: -fps 10
http options:  -w ./www-octopi -n --listen 127.0.0.1

Explicitly USB device:
-----------------------------------------------

Found video devices:
/dev/video0
/dev/video10
/dev/video11
/dev/video12
/dev/video13
/dev/video14
/dev/video15
/dev/video16
config file='/boot/octopi.txt':USB device was not set in options, start MJPG-streamer with the first found video device: /dev/video0
<13>Nov 20 13:01:20 root: Starting USB webcam
Checking for VL805 (Raspberry Pi 4)...
  - It seems that you don't have VL805 (Raspberry Pi 4).
    There should be no problems with USB (a.k.a. select() timeout)
Running ./mjpg_streamer -o output_http.so -w ./www-octopi -n --listen 127.0.0.1 -i input_uvc.so -r 640x480 -f 10 -d /dev/video0
MJPG Streamer Version: git rev: 5554f42c352ecfa7edaec6fc51e507afce605a34
 i: Using V4L2 device.: /dev/video0
 i: Desired Resolution: 640 x 480
 i: Frames Per Second.: 10
 i: Format............: JPEG
 i: TV-Norm...........: DEFAULT
 i: The specified resolution is unavailable, using: width 352 height 288 instead
 i: Could not obtain the requested pixelformat: MJPG , driver gave us: RGB3
    ... will try to handle this by checking against supported formats.
    ... Falling back to RGB24 mode (consider using -fourcc RGB24 option). Note that this requires much more CPU power
Setting FPS on the capture device is not supported, fallback to software framedropping
: Invalid argument
 i: Frame period time ......: 100 ms
Unable to map buffer: Invalid argument
Init v4L2 failed !! exit fatal
 i: init_VideoIn failed
Done bring up all configured video device

Goodbye...

Tell me if you need anything else :slight_smile:

OctoPrint Version: 1.7.2

Thanks in advance for any help!

2

A few things to look at:

First, make sure when you change camera_usb_options in octopi.txt that you are removing the # at the beginning of the line, otherwise the changes have no effect: # is a comment.

Next, see what that camera actually supports: run v4l2-ctl --list-formats-ext and look at the output.

You're looking for 2 things in this output. One is the resolutions supported and 2 is the formats. The ideal format would be 'MJPG' or 'JPG', but it's likely you only have 'YUYV' support.

Pick a resolution/framerate combination and edit your octopi.txt to set camera_usb_options as appropriate. If this camera does only support YUYV, add in that -y switch as you tried. So if your camera only supports 320x240 at 10 fps in YUYV mode, you'd have camera_usb_options=-r 320x240 -f 10 -y

3

Thanks for the reply!

Output of v4l2-ctl --list-formats-ex:

ioctl: VIDIOC_ENUM_FMT
        Type: Video Capture

        [0]: 'S561' (GSPCA SPCA561, compressed)
                Size: Discrete 320x240
                Size: Discrete 352x288
        [1]: 'GBRG' (8-bit Bayer GBGB/RGRG)
                Size: Discrete 160x120
                Size: Discrete 176x144

Seems like it's neither MJPG nor YUYV, lol

4

Hmm, it may not work then. I'm not familiar with those formats and it doesn't look like mjpg-streamer has an option for those, even in the sources.