#Sub-second screen-sharing between Linux machines.html

        >an uninterrupted network connection will be required,
          which in most cases will mean using a VPN
        >${VIEWER_IP} stands for the IP of the watcher and is no typo
        >with the srt protocol, the streamer is pushing data to an IP,
          as opposed to say webhosting where the client contacts the server
        >go ahead and choose ${PORT} at random {8697}
        >NOTE: the observer latency was ~800ms routing from the eastern-block to the US;
                however it has a tendency to degrade over time;
                restarting it once in a while is recommended
        {@begin=sh@
            # Command to start listening
            # NOTE: Must be ran before the stream starts!
            # NOTE: Setting the bellow destination URL inside
            #        OBS should also yield a stream.
            #       It should and does on a Debian build,
            #        but silently fails on *my* Gentoo build.
            mpv \
            --profile=low-latency \
            "srt://${VIEWER_IP}:${PORT}/?mode=listener"
        @end=sh@}
        {@begin=sh@
            # Command to start streaming
            # NOTE: Will fail if the listener is absent!
            ffmpeg \
                -hide_banner \
                -loglevel error \
                -fflags nobuffer \
                -avioflags direct \
                -use_wallclock_as_timestamps 1 \
                -thread_queue_size 64 \
                -probesize 32 \
                -analyzeduration 0 \
                -f x11grab \
                -draw_mouse 0 \
                -framerate 30 \
                -video_size 1920x1080 \
                -i :0.0+0,0 \
                -fps_mode passthrough \
                -c:v libx264 \
                -preset ultrafast \
                -tune zerolatency \
                -g 30 \
                -b:v 8M -maxrate 10M \
                -bufsize 10M \
                -pix_fmt yuv420p \
                -bsf:v h264_mp4toannexb \
                -flush_packets 1 \
                -max_interleave_delta 0 \
                -muxdelay 0 \
                -muxpreload 0 \
                -mpegts_flags resend_headers \
                -flags +low_delay \
                -f mpegts \
                "srt://${VIEWER_IP}:${PORT}/?mode=caller"
        @end=sh@}