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rphii
n00b
Joined: 08 Jan 2022
Posts: 18
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 Posted: Sat Jun 10, 2023 9:02 am Post subject: [SOLVED] OBS no Display Capture Device Screen |
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Note The original Title was: "OBS no Video Capture Device Screen".
Greetings,
when trying to open a Video Capture Device in OBS there is simply none, and the console prints the following.
| Code: | error: v4l2-input: Unable to open device
error: v4l2-input: Initialization failed, errno: No such file or directory |
Not quite sure where to start. First of all, media-video/obs-studio is compiled with the following USE flags.
| Code: | | [ebuild R ] media-video/obs-studio-29.1.2 USE="alsa lua nvenc pipewire pulseaudio ssl v4l wayland -browser -decklink -fdk -jack -python (-qt6) -speex -truetype -vlc -websocket" LUA_SINGLE_TARGET="luajit" PYTHON_SINGLE_TARGET="python3_11 -python3_10" |
I did find out that there are several kernel settings regarding V4L2 (SYNC, FWNODE, H264...). However, their descriptions don't really give away too much information (like nothing). Plus, I can't locate them since it only shows me the source file location (if that path is the source file).
Again, not sure where to start looking for. I also don't quite know what other info I should provide, but I'll gladly provide it if you ask me for it.
Regards and thanks in advance.
Last edited by rphii on Sun Jun 11, 2023 9:55 am; edited 2 times in total |
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shadowless
Tux's lil' helper
Joined: 27 Nov 2022
Posts: 101
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| Posted: Sat Jun 10, 2023 3:09 pm Post subject: |
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Which capture device is it?
If it is a newer device, it is likely to be a UVC device (should check if it is) - in which case the kernel config options are the same as a webcam listed here:
https://wiki.gentoo.org/wiki/Webcam#Kernel |
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rphii
n00b
Joined: 08 Jan 2022
Posts: 18
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| Posted: Sun Jun 11, 2023 9:27 am Post subject: |
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| shadowless wrote: | Which capture device is it?
If it is a newer device, it is likely to be a UVC device (should check if it is) - in which case the kernel config options are the same as a webcam listed here:
https://wiki.gentoo.org/wiki/Webcam#Kernel |
Hmmm... So what "Video Capture Device" really is, is a webcam? I see, I confused it with "Display Capture Device" (looked it up now because of it).
What I really wanted is said "Video Capture Device" option, that is missing entirely. I've seen this section https://wiki.gentoo.org/wiki/OBS_Studio#Wayland but it didn't change anything.
I have both pipewire and pulseaudio installed.
| Code: | [ebuild R ] media-sound/pulseaudio-16.1 USE="daemon glib -bluetooth -jack -ofono-headset" ABI_X86="32 (64) (-x32)"
[ebuild R ] media-video/pipewire-0.3.71-r2 USE="readline ssl -X -bluetooth -dbus -doc -echo-cancel -extra -ffmpeg -flatpak -gsettings -gstreamer -jack-client -jack-sdk -lv2 -modemmanager -pipewire-alsa -sound-server (-system-service) -systemd -test -v4l -zeroconf" ABI_X86="(64) -32 (-x32)" |
According to https://wiki.gentoo.org/wiki/PipeWire#Prerequisites in my start script I do | Code: | | export XDG_RUNTIME_DIR="/tmp/hyprland" |
and also in my .config/hypr/hyprland.conf | Code: | | exec = gentoo-pipewire-launcher & |
Now, at first it seemed that it didn't solve anything, because OBS wasn't showing any window when launched. But somehow it works now, maybe all it took was a bit time after I started hyprland... I don't quite know. |
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rphii
n00b
Joined: 08 Jan 2022
Posts: 18
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| Posted: Mon May 13, 2024 12:05 pm Post subject: "Better" Solution |
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So recently I really fixed not having any "Screen Capture". (Because the issue reoccured)
If you are also facing this problem, make sure you have PipeWire (media-video/pipewire) installed. I don't have many flags set for it, mainly X, readline, ssl.
Then, if you use Hyprland (or something similar), you can check out the Wiki and search for a section "screen sharing". You will notice, that there's mentions of xdg-desktop-portal-hyprland and a small script to actually start it.
If this doesn't help, make sure to just carefully read terminal outputs of whatever program you use while carefully consulting the Wiki.
Cheers |
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