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==On Screen Display== | ==On Screen Display== | ||
=== Show Keyboard commands === | === Show Keyboard commands === | ||
When showing software it's usefull for the students to see which keyboard shortcuts are pressed. | When showing software it's usefull for the students to see which keyboard shortcuts are pressed. You can use screenkey, an on screen display (OSD) which should be installed like this: [https://gitlab.com/screenkey/screenkey/-/issues/111 (Don't install from repository)] | ||
git clone https://gitlab.com/screenkey/screenkey.git | |||
will install the screenkey application. Run | cd screenkey | ||
sudo ./setup.py install | |||
will install the screenkey application. Run with screenkey | |||
[[File:Screenkey.png]] | [[File:Screenkey.png]] | ||
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=== Show Mouse Clicks === | === Show Mouse Clicks === | ||
There is a feature branch in the screenkey git which implements that, hopefully it will be merged into master once you read this. | |||
== Stream Canon 5D via USB == | == Stream Canon 5D via USB == | ||
Revision as of 21:55, 28 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. You can use screenkey, an on screen display (OSD) which should be installed like this: (Don't install from repository)
git clone https://gitlab.com/screenkey/screenkey.git cd screenkey sudo ./setup.py install
will install the screenkey application. Run with screenkey
Make sure to check "Show modifier sequences only" otherwise everyone can read your password inputs...
Show Mouse Clicks
There is a feature branch in the screenkey git which implements that, hopefully it will be merged into master once you read this.
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.
modprobe v4l2loopback devices=1 video_nr=10 card_label="OBS Cam" exclusive_caps=1
to install follow these steps:
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 make install