[Video] Adding a USB Webcam to DWC with a Raspberry Pi

[stuartofmt]

@Phaedrux

Sorry - I have DWiFi Server 1.23 and DWC 3.1.1 -- looked but didn't look

[fractalengineer]

brilliant, thank you. I never knew how to make it work but that step by step guide is of great help.

I seem to be stuck halfway though; I installed snapd and mjpg streamer and everything seems to be running well (see the snapd process)

pi@duet3:~ $ ps -A
  PID TTY          TIME CMD
    1 ?        00:00:06 systemd
    2 ?        00:00:00 kthreadd
    3 ?        00:00:00 rcu_gp
    4 ?        00:00:00 rcu_par_gp
    7 ?        00:00:00 kworker/u8:0-events_unbound
    8 ?        00:00:00 mm_percpu_wq
    9 ?        00:00:00 ksoftirqd/0
   10 ?        00:00:00 rcu_sched
   11 ?        00:00:00 migration/0
   12 ?        00:00:00 cpuhp/0
   13 ?        00:00:00 cpuhp/1
   14 ?        00:00:00 migration/1
   15 ?        00:00:00 ksoftirqd/1
   18 ?        00:00:00 cpuhp/2
   19 ?        00:00:00 migration/2
   20 ?        00:00:00 ksoftirqd/2
   23 ?        00:00:00 cpuhp/3
   24 ?        00:00:00 migration/3
   25 ?        00:00:00 ksoftirqd/3
   28 ?        00:00:00 kdevtmpfs
   29 ?        00:00:00 netns
   30 ?        00:00:00 kworker/0:1-events
   32 ?        00:00:00 kauditd
   33 ?        00:00:00 khungtaskd
   34 ?        00:00:00 oom_reaper
   35 ?        00:00:00 writeback
   36 ?        00:00:00 kcompactd0
   54 ?        00:00:00 kblockd
   55 ?        00:00:00 blkcg_punt_bio
   56 ?        00:00:00 watchdogd
   58 ?        00:00:00 rpciod
   59 ?        00:00:00 kworker/u9:0-hci0
   60 ?        00:00:00 xprtiod
   61 ?        00:00:00 kswapd0
   62 ?        00:00:00 nfsiod
   64 ?        00:00:00 iscsi_eh
   65 ?        00:00:00 dwc_otg
   66 ?        00:00:00 DWC Notificatio
   67 ?        00:00:00 kworker/1:2-events
   68 ?        00:00:00 vchiq-slot/0
   69 ?        00:00:00 vchiq-recy/0
   70 ?        00:00:00 vchiq-sync/0
   71 ?        00:00:00 vchiq-keep/0
   72 ?        00:00:00 SMIO
   73 ?        00:00:00 kworker/1:3-events_freezable
   74 ?        00:00:00 mmc_complete
   75 ?        00:00:00 kworker/1:1H-kblockd
   76 ?        00:00:00 kworker/0:1H-mmc_complete
   77 ?        00:00:00 jbd2/mmcblk0p2-
   78 ?        00:00:00 ext4-rsv-conver
   79 ?        00:00:00 kworker/0:2H-kblockd
   80 ?        00:00:00 ipv6_addrconf
   84 ?        00:00:00 kworker/2:1H-kblockd
   86 ?        00:00:00 kworker/3:1H-kblockd
  101 ?        00:00:00 kworker/1:2H
  102 ?        00:00:00 kworker/3:2H-kblockd
  108 ?        00:00:00 irq/166-usb-001
  111 ?        00:00:00 kworker/2:2H-kblockd
  123 ?        00:00:03 systemd-journal
  144 ?        00:00:01 kworker/u8:2-events_unbound
  148 ?        00:00:01 systemd-udevd
  149 ?        00:00:00 loop0
  150 ?        00:00:00 loop1
  172 ?        00:00:00 SMIO
  179 ?        00:00:00 mmal-vchiq
  180 ?        00:00:01 spi0
  183 ?        00:00:00 mmal-vchiq
  186 ?        00:00:00 mmal-vchiq
  189 ?        00:00:00 mmal-vchiq
  233 ?        00:00:00 cfg80211
  241 ?        00:00:00 brcmf_wq/mmc1:0
  244 ?        00:00:00 brcmf_wdog/mmc1
  321 ?        00:00:00 systemd-timesyn
  358 ?        00:00:00 cron
  359 ?        00:00:00 rsyslogd
  360 ?        00:00:00 dbus-daemon
  362 ?        00:01:25 DuetControlServ
  363 ?        00:00:00 thd
  366 ?        00:00:00 wpa_supplicant
  368 ?        00:00:00 rngd
  373 ?        00:00:00 avahi-daemon
  374 ?        00:00:00 alsactl
  377 ?        00:00:00 systemd-logind
  397 ?        00:00:02 snapd
  425 ?        00:00:00 avahi-daemon
  471 ?        00:00:00 wpa_supplicant
  479 ?        00:00:00 kworker/3:4-events_power_efficient
  534 ?        00:00:02 irq/167-dcs-trp
  549 ?        00:00:00 kworker/2:2-events
  553 ?        00:00:00 hciattach
  555 ?        00:00:00 kworker/u9:1-hci0
  557 ?        00:00:00 bluetoothd
  558 ?        00:00:00 bluealsa
  573 ?        00:00:00 krfcommd
  628 ?        00:00:00 dhcpcd
  633 ?        00:00:21 DuetWebServer
  645 tty1     00:00:00 agetty
  654 ?        00:00:00 sshd
  666 ?        00:00:00 sshd
  795 ?        00:00:00 systemd
  796 ?        00:00:00 (sd-pam)
  810 ?        00:00:00 sshd
  811 pts/0    00:00:00 bash
  834 pts/0    00:00:00 sudo
  835 pts/0    00:00:00 nano
  984 ?        00:00:00 kworker/0:0-events
  985 ?        00:00:00 kworker/3:1-cgroup_destroy
  988 ?        00:00:00 kworker/2:0-mm_percpu_wq
  994 ?        00:00:00 kworker/0:0H
  995 ?        00:00:00 kworker/3:0H
  996 ?        00:00:00 kworker/1:0-events
 1005 ?        00:00:00 kworker/u8:1-events_unbound
 1053 ?        00:00:00 kworker/3:0-events_power_efficient
 1154 ?        00:00:00 kworker/0:2-events
 1157 ?        00:00:00 kworker/2:1-events
 1159 pts/0    00:00:00 ps

mjpg is well installed

pi@duet3:~ $ sudo snap install mjpg-streamer
snap "mjpg-streamer" is already installed, see 'snap help refresh'
 

And I've copied exactly the same config file as yours

pi@duet3:~ $ sudo nano /var/snap/mjpg-streamer/current/config
  GNU nano 3.2                                                                                       /var/snap/mjpg-streamer/current/config
 
INPUTOPTS="input_uvc.so -y -r 640x480 -d /dev/video0"
PORT="-p 8080"
DAEMON="true"

And yet when I enter my duet IP :8080, I get no response.

Any hint on what could be the issue?

Using a RPi 3B+ on Duet3

Thanks!

[PCR]

Which USB Camera are you using?

[fractalengineer]

@PCR well I'm not; I got a raspi cam.

My first attempt was with the line INPUTOPTS="input_raspi.so" as described in the guide but that didn't work out either.

I thought I would try with your config that seemed to be working as it seems the issue is with the interface not loading; I would assume if the camera was setup wrong the GUI would still load, just show no image.

[PCR]

Sorry. Raspi Cam is Not working with the SNAP. Interface will only be loade when camera is working.

I saw on github a new plugin for raspi cams for DWC

Best

[PCR]

@fractalengineer

use this

https://desertbot.io/blog/how-to-stream-the-picamera

[fractalengineer]

@PCR Thanks, I did manage to get it working just for a few moments before it froze and I can't get it to run again lol (the interface load, not the cam)

But I'll keep trying and keep you posted

[gdefranc]

Installed on rasp pi3 with octoprint and activated on DWC with Logitech C270 webcam. It works.
Now I have to fix the Timelapse.

[PCR]

@gdefranc with duetlapse easy. But use the snapshot Screen of Mjpg

[PCR]

And the DuetAPI from @jay_s_uk

[fma]

You can turn a Pi zero+ cam as a usb webcam, using https://github.com/showmewebcam/showmewebcam

[Phaedrux]

I use a PizeroW with the Pi cam module and MotionOS to turn it into a webcam. It works very well with DWC and makes for a very small and very functional cam.

https://github.com/ccrisan/motioneyeos/wiki