Arch Linux User Repository

Fixing DroidCam Installation on Manjaro Linux

This update provides a solution for users facing linking errors during the installation of DroidCam on Manjaro Linux.

System Context

• Kernel Version: Linux workhorse 6.1.68-1-MANJARO #1 SMP PREEMPT_DYNAMIC Thu Dec 14 00:46:56 UTC 2023 x86_64 GNU/Linux
• System Specifications: see bottom of comment

Issue Encountered

During the installation of DroidCam using yay (yay -Syy droidcam), the following linking errors were encountered related to the TurboJPEG library:

/usr/bin/ld: /tmp/ccYSjh0z.o: in function `decoder_prepare_video':
decoder.c:(.text+0x35f): undefined reference to `tjInitDecompress'
...
/usr/bin/ld: decoder.c:(.text+0xac3): undefined reference to `tjGetErrorStr2'
collect2: error: ld returned 1 exit status
make: *** [Makefile:61: droidcam-cli] Error 1
==> ERROR: A failure occurred in build().

Steps Taken to Resolve the Issue

1. Cloning the Git Repository:
2. Initially cloned the DroidCam repository from its AUR package.

3. git clone https://aur.archlinux.org/droidcam

4. Modifying the PKGBUILD File:

5. Edited the PKGBUILD script to resolve the linking issue.

6. The build() function in the script was modified from: bash make JPEG_DIR="" JPEG_INCLUDE="" JPEG_LIB="" JPEG=$(pkg-config --libs --cflags libturbojpeg) USBMUXD=-lusbmuxd-2.0 to: bash make JPEG_DIR="/usr/lib" JPEG_INCLUDE="/usr/include" JPEG_LIB="-lturbojpeg" USBMUXD=-lusbmuxd-2.0

7. Building and Installing the Modified Package:

8. After modifying the PKGBUILD file, the package was successfully built and installed without the previous linking errors using makepkg -is in the folder where droidcam aur was cloned.

Conclusion

This modification to the PKGBUILD file addresses the specific linking errors encountered with the TurboJPEG library during the installation of DroidCam on Manjaro Linux. Users facing similar issues can follow these steps to resolve the problem.

I do not understand myself why this explicit linking was necessary, open to suggestions.

System info:

inxi -Fxz
System:
  Kernel: 6.1.68-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
    Desktop: KDE Plasma v: 5.27.10 Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Desktop Mobo: Gigabyte model: X58A-UD5 serial: <superuser required>
    BIOS: Award v: FD date: 02/01/2011
CPU:
  Info: quad core model: Intel Core i7 960 bits: 64 type: MT MCP arch: Nehalem
    rev: 5 cache: L1: 256 KiB L2: 1024 KiB L3: 8 MiB
  Speed (MHz): avg: 1603 high: 1634 min/max: 1596/3193 boost: enabled cores:
    1: 1599 2: 1599 3: 1599 4: 1634 5: 1599 6: 1599 7: 1599 8: 1599
    bogomips: 51181
  Flags: ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
  Device-1: NVIDIA GK106 [GeForce GTX 660] vendor: Gigabyte driver: nvidia
    v: 470.223.02 arch: Kepler bus-ID: 03:00.0
  Display: x11 server: X.Org v: 21.1.10 with: Xwayland v: 23.2.3 driver: X:
    loaded: nvidia gpu: nvidia resolution: 1: 1920x1080~60Hz 2: 1920x1080~60Hz
  API: EGL v: 1.5 drivers: kms_swrast,nvidia,swrast platforms:
    active: gbm,x11,surfaceless,device inactive: wayland,device-1
  API: OpenGL v: 4.6.0 compat-v: 4.5 vendor: nvidia mesa v: 470.223.02
    glx-v: 1.4 direct-render: yes renderer: NVIDIA GeForce GTX 660/PCIe/SSE2
  API: Vulkan v: 1.3.269 drivers: nvidia surfaces: xcb,xlib devices: 1
Audio:
  Device-1: Intel 82801JI HD Audio vendor: Gigabyte GA-EP45-DS5/GA-EG45M-DS2H
    driver: snd_hda_intel v: kernel bus-ID: 00:1b.0
  Device-2: NVIDIA GK106 HDMI Audio vendor: Gigabyte driver: snd_hda_intel
    v: kernel bus-ID: 03:00.1
  API: ALSA v: k6.1.68-1-MANJARO status: kernel-api
  Server-1: JACK v: 1.9.22 status: off
  Server-2: PipeWire v: 1.0.0 status: active
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    vendor: Gigabyte driver: r8169 v: kernel port: ae00 bus-ID: 07:00.0
  IF: enp7s0 state: down mac: <filter>
  Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    vendor: Gigabyte driver: r8169 v: kernel port: 9e00 bus-ID: 08:00.0
  IF: enp8s0 state: down mac: <filter>
  Device-3: TP-Link Archer T9UH v1 [Realtek RTL8814AU] driver: rtl8814au
    type: USB bus-ID: 9-1:2
  IF: wlp2s0u1 state: up mac: <filter>
  IF-ID-1: br-275fa1ecbe8a state: down mac: <filter>
  IF-ID-2: br-4979e87956bb state: down mac: <filter>
  IF-ID-3: br-4a6d90915cde state: down mac: <filter>
  IF-ID-4: br-b80245bb5ab5 state: down mac: <filter>
  IF-ID-5: br-be0abe5d9c19 state: down mac: <filter>
  IF-ID-6: br-cee54582c206 state: down mac: <filter>
  IF-ID-7: br-f2e2836dbec6 state: down mac: <filter>
  IF-ID-8: docker0 state: down mac: <filter>
Drives:
  Local Storage: total: 931.52 GiB used: 356.53 GiB (38.3%)
  ID-1: /dev/sda vendor: Samsung model: HD501LJ size: 465.76 GiB
  ID-2: /dev/sdb vendor: Seagate model: ST500DM002-1BD142 size: 465.76 GiB
Partition:
  ID-1: / size: 78.12 GiB used: 63.69 GiB (81.5%) fs: btrfs dev: /dev/sdb2
  ID-2: /home size: 379.63 GiB used: 292.83 GiB (77.1%) fs: btrfs
    dev: /dev/sdb3
  ID-3: /var/log size: 78.12 GiB used: 63.69 GiB (81.5%) fs: btrfs
    dev: /dev/sdb2
Swap:
  ID-1: swap-1 type: partition size: 8 GiB used: 1.8 MiB (0.0%) dev: /dev/sdb4
Sensors:
  System Temperatures: cpu: 65.0 C mobo: N/A gpu: nvidia temp: 47 C
  Fan Speeds (rpm): N/A gpu: nvidia fan: 47%
Info:
  Processes: 332 Uptime: 9h 20m Memory: total: 16 GiB available: 15.62 GiB
  used: 12.07 GiB (77.3%) Init: systemd Compilers: gcc: 13.2.1 clang: 16.0.6
  Packages: 1445 Shell: Bash v: 5.2.21 inxi: 3.3.31

With kernel 6.6.1 this module produces a kernel dump during booting. Please, see the full report here: https://bbs.archlinux.org/viewtopic.php?pid=2132592#p2132592

According to upstream's GitHub page DroidCam works with the standard v4l2loopback module, so installing v4l2loopback-dc is optional, so the v4l2loopback-dc-dkms package would probably be better off as an optional dependency that provides V4L2LOOPBACK-MODULE (i.e. what the official v4l2loopback-dkms package provides) which droidcam should then depend on.

@creepergd Hey, when you have a patch for an outdated package it's best to just put it in the comments and wait for one of the maintainers to apply it. Or send them an email if it takes too long.

Quickfix:

Change pkgver to

pkgver=2.0.0

and

sha256sums=('90dd73cf146fae0de0c11b46e97412d2aaca50ec879e1be2d793261e853dd0d3'
            '1e91f58ae83d433d32b483b14f1bb39cc245d2ace711b12c894de27dd2ea3413'
            '1d4b3ff98b4af9de77a24d1b6fad6e004deadf1f157eb800aa878ba1e7693dac'
            'a5a5601efc60ae5e60e189f9ec8c73dab5579e6fdeebdcb9b809b6befb416ecc')

to

sha256sums=('90dd73cf146fae0de0c11b46e97412d2aaca50ec879e1be2d793261e853dd0d3'
            '1e91f58ae83d433d32b483b14f1bb39cc245d2ace711b12c894de27dd2ea3413'
            '1d4b3ff98b4af9de77a24d1b6fad6e004deadf1f157eb800aa878ba1e7693dac'
            'SKIP')

@creepergd, no, duplicate packages are forbidden ... Please either update the package locally, wait for it to be updated here or help by maintaining the existing PKGBUILD

Do you guys think that the AUR would accept if I were to copy this script and modify it to have later versions or not? I've never made any significant contributions to a distro or anything FOSS and I wanna start doing that because I love arch lol. I already was able to install 2.0.0 by changing pkgver to 2.0.0 and skipping integ checks because I was too lazy to get the checksums and stuff, but I'll bet I could get that working. I learned some bash scripting in college and I want to put some of that to use.

snd_aloop only needs to be loaded when using Android device as an audio source, no? In the repository the developer even recommends against using this feature. snd_aloop being loaded caused me some issues with a Java application (RuneLite) not playing audio. Perhaps this should be an opt-in as opposed to an opt-out?

version 2.0.0 is released

droidcam: error while loading shared libraries: libswscale.so.6: cannot open shared object file: No such file or directory

👆🏽 If anyone sees this err, rebuild droidcam. It will work inshaAllah ✅