Arch Linux User Repository

@mhdi

In droidcam.conf, you have:

videodev
v4l2loopback-dc
snd-aloop

This means droidcam.conf is reliant on there being v4l2looback-dc. However, you have the droidcam package rely on V4L2LOOPBACK-MODULE, which also includes v4l2loopback.

I get an error when connecting to the camera

droidcam
Video: /dev/video0
Audio: hw:0,1,0

(droidcam:514803): Gtk-CRITICAL **: 09:56:36.979: gtk_widget_get_scale_factor: assertion 'GTK_IS_WIDGET (widget)' failed
free(): invalid size
fish: Job 1, 'droidcam' terminated by signal SIGABRT (Abort)

I experience frequent crashes with this package lately, which seem to be caused by dynamically linked libjpeg-turbo. The official release from GitHub works well.

Would you consider switching this package to statically linked libjpeg-turbo like the developer recommends?

https://github.com/dev47apps/droidcam-linux-client/issues/305

The last errors on current Manjaro (continuing from the previous comment):

==> Building image from preset: /etc/mkinitcpio.d/linux-ck.preset: 'default'
==> Using default configuration file: '/etc/mkinitcpio.conf'
  -> -k /boot/vmlinuz-linux-ck -g /boot/initramfs-linux-ck.img
==> ERROR: Invalid option -k -- '/boot/vmlinuz-linux-ck' must be readable
==> Building image from preset: /etc/mkinitcpio.d/linux-ck.preset: 'fallback'
==> Using default configuration file: '/etc/mkinitcpio.conf'
  -> -k /boot/vmlinuz-linux-ck -g /boot/initramfs-linux-ck-fallback.img -S autodetect
==> ERROR: Invalid option -k -- '/boot/vmlinuz-linux-ck' must be readable
error: command failed to execute correctly

Warnings and errors (though it did get updated) on current Manjaro x64. At least some are because of upstream, but unsure if all are so.

yay
...
1  aur/v4l2loopback-dc-dkms  1:2.1.4-1 -> 1:2.1.5-1
...
==> Checking buildtime dependencies...
==> WARNING: Using existing $srcdir/ tree
...
src/decoder_snd.c: In function ‘find_snd_device’:
src/decoder_snd.c:291:26: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘int’ [-Wformat=]
  291 |                 errprint("Unexpected audio device buffer size: %ld expected %ld\n",
      |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/common.h:35:39: note: in definition of macro ‘errprint’
   35 | #define errprint(...) fprintf(stderr, __VA_ARGS__)
      |                                       ^~~~~~~~~~~
src/decoder_snd.c:291:79: note: format string is defined here
  291 |                 errprint("Unexpected audio device buffer size: %ld expected %ld\n",
      |                                                                             ~~^
      |                                                                               |
      |                                                                               long int
      |                                                                             %d
...
src/decoder_snd.c:291:26: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘int’ [-Wformat=]
  291 |                 errprint("Unexpected audio device buffer size: %ld expected %ld\n",
      |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/common.h:35:39: note: in definition of macro ‘errprint’
   35 | #define errprint(...) fprintf(stderr, __VA_ARGS__)
      |                                       ^~~~~~~~~~~
src/decoder_snd.c:291:79: note: format string is defined here
  291 |                 errprint("Unexpected audio device buffer size: %ld expected %ld\n",
      |                                                                             ~~^
      |                                                                               |
      |                                                                               long int
      |                                                                             %d
...
(2/3) Install DKMS modules
==> dkms install --no-depmod v4l2loopback-dc/2.1.5 -k 6.18.8-1-MANJARO
Deprecated feature: CLEAN (/usr/src/v4l2loopback-dc-2.1.5/dkms.conf)
==> dkms install --no-depmod v4l2loopback-dc/2.1.5 -k 6.12.68-1-MANJARO
Deprecated feature: CLEAN (/var/lib/dkms/v4l2loopback-dc/2.1.5/source/dkms.conf)
==> dkms install --no-depmod v4l2loopback-dc/2.1.5 -k 6.19.0-rc7-1-MANJARO
Deprecated feature: CLEAN (/var/lib/dkms/v4l2loopback-dc/2.1.5/source/dkms.conf)
...
==> depmod 6.18.8-1-MANJARO
==> ERROR: Missing 5.10.248-1-MANJARO kernel modules tree for module v4l2loopback-dc/2.1.5.
(3/3) Updating linux initcpios...
==> Building image from preset: /etc/mkinitcpio.d/linux519.preset: 'default'
==> Using configuration file: '/etc/mkinitcpio.conf'
  -> -k /boot/vmlinuz-5.19-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.19-x86_64.img
==> ERROR: Invalid option -k -- '/boot/vmlinuz-5.19-x86_64' must be readable
==> Building image from preset: /etc/mkinitcpio.d/linux519.preset: 'fallback'
==> Using configuration file: '/etc/mkinitcpio.conf'
  -> -k /boot/vmlinuz-5.19-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.19-x86_64-fallback.img -S autodetect
==> ERROR: Invalid option -k -- '/boot/vmlinuz-5.19-x86_64' must be readable
==> Building image from preset: /etc/mkinitcpio.d/linux60.preset: 'default'
==> Using configuration file: '/etc/mkinitcpio.conf'
  -> -k /boot/vmlinuz-6.0-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-6.0-x86_64.img
==> ERROR: Invalid option -k -- '/boot/vmlinuz-6.0-x86_64' must be readable
==> Building image from preset: /etc/mkinitcpio.d/linux60.preset: 'fallback'
==> Using configuration file: '/etc/mkinitcpio.conf'
  -> -k /boot/vmlinuz-6.0-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-6.0-x86_64-fallback.img -S autodetect
==> ERROR: Invalid option -k -- '/boot/vmlinuz-6.0-x86_64' must be readable
==> Building image from preset: /etc/mkinitcpio.d/linux612.preset: 'default'
==> Using default configuration file: '/etc/mkinitcpio.conf'
  -> -k /boot/vmlinuz-6.12-x86_64 -g /boot/initramfs-6.12-x86_64.img

and more - but over a limit of a comment length here, so I will post a separate comment.

You need to add linux-headers as a dependency

Seems like ffmpeg now has libswscale.so.9 so this fails again (looking for libswscale.so.8).

ffmpeg 2:8.0-3.1 (CachyOS has optimized rebuilds so AFAIK it's just 2:8.0-3)

Cleared my cache and reinstalled droidcam, that indeed did the trick, Thank you!

What's your ffmpeg version? Try reinstalling the package.

If you need help, my email is in the PKGBUILD (click on "View PKGBUILD" on the right-hand side).

Hello, still rather new to Arch :)

I have issues getting droidcam to run on a current install (CachyOS). ffmpeg seems to have updated recently, resulting in the following error when trying to run droidcam or droidcam-cli:

error while loading shared libraries: libswscale.so.8: cannot open shared object file: No such file or directory

I traced back libswscale to belonging to ffmpeg. Does that mean droidcam requires a rebuild with new ffmpeg?