source "${BASH_SOURCE%/*}/lib.bash"
stream_command :42 'abcd-efgh-ijkl' cool-retro-term -e tmux aThe stream_command Bash function is designed to create a virtual X display, run a command, and stream the output to YouTube.
The function can be used by calling it with the required arguments:
stream_command $DISPLAY_NUM $STREAM_KEY $COMMAND $OTHER_ARGS$DISPLAY_NUM: the number of the virtual X display to create$STREAM_KEY: the key used to stream the output to YouTube$COMMAND: the command to run$OTHER_ARGS: additional arguments to be passed to the command
For example, to stream a cool-retro-term window running tmux with arguments a, you would run:
stream_command $DISPLAY_NUM $STREAM_KEY cool-retro-term -e tmux aThe stream_command function uses Xvfb to start a virtual X server on the specified display, with a resolution of 640x480 and 16-bit color depth. It also disables listening on the TCP port and sets authentication to /dev/null.
It then runs the specified command on the virtual X display, and uses ffmpeg to stream the output to YouTube. The ffmpeg command generates silent audio using the anullsrc filter, as audio is necessary to satisfy YouTube's streaming requirements.
The video encoding is performed using the libx264 codec, with a target bitrate of 1500k and a maximum bitrate and buffer size of 1500k. The video is captured from the virtual X display using x11grab, with a framerate of 20 frames per second and a pixel format of yuv420p, which allows for more efficient video compression.
Finally, the output is streamed to the YouTube RTMP server using the specified stream key.
The stream_command Bash function has several dependencies that must be installed on the system in order for it to work properly. These dependencies include:
Xvfb: a virtual X server that allows running X applications without a physical display.ffmpeg: a powerful tool for manipulating audio and video files.
In addition, the system must have a stable internet connection to be able to stream the output to YouTube.