AnyCast-Ubuntu

This repository contains all the scripts required to stream audio/video to a Anycast dongle.

Getting started

1. You need to be on X11, not Wayland. You can check by executing echo $XDG_SESSION_TYPE
2. You might need to add the required permission to xhost to allow access to the built in display. xhost +SI:localuser:<Your User ID>
3. You would need ffmpeg installed. My version is ffmpeg version 4.4.2-0ubuntu0.22.04.1
4. To test if ffmpeg can capture your screen, use the following command. ffmpeg -f x11grab -video_size 640x360 -framerate 25 -i :0.0 -t 10 -c:v libx264 -pix_fmt yuv420p output.mp4

Using the scripts.

In one terminal screen, you can execute the following commands depending on what you want to stream.

Stream video and audio from mic

ffmpeg -thread_queue_size 512 -f x11grab -video_size 1280x720 -framerate 30 -i :0.0 \ -thread_queue_size 512 -f pulse -i default \ -c:v libx264 -preset ultrafast -tune zerolatency -pix_fmt yuv420p -b:v 800k \ -c:a aac -b:a 128k \ -f mpegts -listen 1 http://0.0.0.0:8090/streamvideo

To mute the audio on your workstation

pactl set-sink-mute @DEFAULT_SINK@ 1

To unmute the audio

pactl set-sink-mute @DEFAULT_SINK@ 0

Stream both video and audio from computer

ffmpeg -fflags +genpts -use_wallclock_as_timestamps 1 \ -thread_queue_size 512 -f x11grab -video_size 1280x720 -framerate 25 -i :0.0 \ -thread_queue_size 512 -f pulse -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor \ -c:v libx264 -preset ultrafast -tune zerolatency -pix_fmt yuv420p -b:v 1000k \ -c:a aac -b:a 128k \ -f mpegts -listen 1 http://0.0.0.0:8090/streamvideo

Stream only audio with best possible settings.

ffmpeg \ -f pulse -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor \ -c:a aac -b:a 320k -ar 48000 -ac 2 -profile:a aac_low \ -f mpegts -listen 1 http://0.0.0.0:8090/streamvideo

Stream computer audio and mic

ffmpeg \ -f pulse -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor \ -f pulse -i alsa_input.pci-0000_00_1b.0.analog-stereo \ -filter_complex "[0:a][1:a]amix=inputs=2:duration=longest:dropout_transition=2[aout]" \ -map "[aout]" \ -c:a aac -b:a 320k -ar 48000 -ac 2 -profile:a aac_low \ -f mpegts -listen 1 http://0.0.0.0:8090/streamvideo

Once you have any of the streaming commands running via ffmpeg, you can run the python scripts on another terminal. There is a delay of about 4-7 seconds for the video streaming to the dongle. Also, you might need to add the port to your firewall rules using a tool like ufw. For my own testing, I simply disabled it using ufw disable