| Line 19: | Line 19: | ||
gphoto2 --stdout --capture-movie | gst-launch-1.0 fdsrc fd=0 ! decodebin name=dec ! queue ! videoconvert ! tee ! v4l2sink device=/dev/video0 | gphoto2 --stdout --capture-movie | gst-launch-1.0 fdsrc fd=0 ! decodebin name=dec ! queue ! videoconvert ! tee ! v4l2sink device=/dev/video0 | ||
[https://stackoverflow.com/questions/12278688/canon-dslr-video-loop-back-using-v4l2loopback-and-edsdk-liveview Source] | |||
== Stream from OBS to a virtual camera source == | == Stream from OBS to a virtual camera source == | ||
Revision as of 21:44, 27 May 2020
This page documents the setup of a Linux system for screencasting
On Screen Display
Show Keyboard commands
When showing software it's usefull for the students to see which keyboard shortcuts are pressed. If your screen resolution is smaller than 32767 pixels in either direction you can use screenkey, an on screen display (OSD) which be installed like this:
apt install screenkey
will install the screenkey application. Run it from the taskbar:
Make sure to check "Show modifier sequences only" otherwise everyone can read your password inputs...
Show Mouse Clicks
no solution yet
Stream Canon 5D via USB
modprobe v4l2loopback gphoto2 --stdout --capture-movie | gst-launch-1.0 fdsrc fd=0 ! decodebin name=dec ! queue ! videoconvert ! tee ! v4l2sink device=/dev/video0
Stream from OBS to a virtual camera source
We can't stream directly from OBS into Jitsi, BigBlueBitton, Google Meet, Skype, etc. For this wee need a virtual camera source.
sudo modprobe v4l2loopback devices=1 video_nr=10 card_label="OBS Cam" exclusive_caps=1 sudo apt install qtbase5-dev git clone --recursive https://github.com/obsproject/obs-studio.git git clone https://github.com/CatxFish/obs-v4l2sink.git cd obs-v4l2sink mkdir build && cd build cmake -DLIBOBS_INCLUDE_DIR="../../obs-studio/libobs" -DCMAKE_INSTALL_PREFIX=/usr .. make -j4 sudo make install
Source: https://srcco.de/posts/using-obs-studio-with-v4l2-for-google-hangouts-meet.html