<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p><br>
</p>
<div class="moz-cite-prefix">On 2/19/25 18:17, Snyder, Alexander J
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAAqYjtM=8qUuT9CTdBSm5thoNc_6pWqq+B7vs03UUGwjdPbC6A@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto">
<div>On Wayland, x11grab won't work because there is no direct
access to the display like in Xorg. Instead, you'll need to
use PipeWire and wf-recorder or obs-v4l2sink.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Solution Using PipeWire (wf-recorder and
v4l2loopback)</div>
<div dir="auto"><br>
</div>
<div dir="auto">1. Install required dependencies (if not already
installed):</div>
<div dir="auto"><br>
</div>
<div dir="auto">sudo apt install wf-recorder v4l2loopback-utils
v4l2loopback-dkms</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">2. Load the v4l2loopback module (if not already
loaded):</div>
<div dir="auto"><br>
</div>
<div dir="auto">sudo modprobe v4l2loopback devices=1 video_nr=10
card_label="Virtual Camera" exclusive_caps=1</div>
<div dir="auto"><br>
</div>
<div dir="auto">This creates /dev/video10, which you will use as
your virtual camera.</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">3. Capture the second monitor and send it to
/dev/video10:</div>
<div dir="auto"><br>
</div>
<div dir="auto">wf-recorder -o HDMI-A-1 -f - | ffmpeg -i - -f
v4l2 -vcodec rawvideo -pix_fmt yuv420p /dev/video10</div>
<div dir="auto"><br>
</div>
<div dir="auto">Replace HDMI-A-1 with your monitor's correct
name. Find your available outputs with:</div>
<div dir="auto"><br>
</div>
<div dir="auto">swaymsg -t get_outputs</div>
</div>
</blockquote>
<p>I tried swaymsg and got this</p>
<p>$ swaymsg -t get_outputs<br>
00:00:00.040 [swaymsg/<a class="moz-txt-link-freetext" href="main.c:494">main.c:494</a>] Unable to retrieve socket path</p>
<p>I tried to find another way to get the same information. I ended
up trying ls /sys/class/drm and found card1-HDMI_A_1 among the
contents of that folder. </p>
<p><br>
</p>
<p>Next I tried the wf-recorder command you said to try. I got the
following and Zoom didn't detect a camera. Do I have something
missing?<br>
</p>
<p><span style="font-family:monospace"><br>
</span></p>
<p>$ wf-recorder -o HDMI-A-1 -f - | ffmpeg -i - -f v4l2 -vcodec
rawvideo -pix_fmt yuv420p /dev/video10<br>
ffmpeg version 6.1.1-3ubuntu5 Copyright (c) 2000-2023 the FFmpeg
developers<br>
built with gcc 13 (Ubuntu 13.2.0-23ubuntu3)<br>
configuration: --prefix=/usr --extra-version=3ubuntu5
--toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
--incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
--disable-stripping --disable-omx --enable-gnutls --enable-libaom
--enable-libass --enable-libbs2b --enable-libcaca --enable-libcdio
--enable-libcodec2 --enable-libdav1d --enable-libflite
--enable-libfontconfig --enable-libfreetype --enable-libfribidi
--enable-libglslang --enable-libgme --enable-libgsm
--enable-libharfbuzz --enable-libmp3lame --enable-libmysofa
--enable-libopenjpeg --enable-libopenmpt --enable-libopus
--enable-librubberband --enable-libshine --enable-libsnappy
--enable-libsoxr --enable-libspeex --enable-libtheora
--enable-libtwolame --enable-libvidstab --enable-libvorbis
--enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2
--enable-libxvid --enable-libzimg --enable-openal --enable-opencl
--enable-opengl --disable-sndio --enable-libvpl --disable-libmfx
--enable-libdc1394 --enable-libdrm --enable-libiec61883
--enable-chromaprint --enable-frei0r --enable-ladspa
--enable-libbluray --enable-libjack --enable-libpulse
--enable-librabbitmq --enable-librist --enable-libsrt
--enable-libssh --enable-libsvtav1 --enable-libx264
--enable-libzmq --enable-libzvbi --enable-lv2 --enable-sdl2
--enable-libplacebo --enable-librav1e --enable-pocketsphinx
--enable-librsvg --enable-libjxl --enable-shared<br>
libavutil 58. 29.100 / 58. 29.100<br>
libavcodec 60. 31.102 / 60. 31.102<br>
libavformat 60. 16.100 / 60. 16.100<br>
libavdevice 60. 3.100 / 60. 3.100<br>
libavfilter 9. 12.100 / 9. 12.100<br>
libswscale 7. 5.100 / 7. 5.100<br>
libswresample 4. 12.100 / 4. 12.100<br>
libpostproc 57. 3.100 / 57. 3.100<br>
compositor doesn't support wlr-screencopy-unstable-v1<br>
[in#0 @ 0x639aee7d2cc0] Error opening input: Invalid data found
when processing input<br>
Error opening input file -.<br>
Error opening input files: Invalid data found when processing
input<br>
<br>
</p>
</body>
</html>