122 lines
3.4 KiB
Bash
Executable File
122 lines
3.4 KiB
Bash
Executable File
#!/bin/sh
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# default values for arguments
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remarkable="${REMARKABLE_IP:-10.11.99.1}" # remarkable IP address
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#remarkable="${REMARKABLE_IP:-10.143.0.112}" # remarkable IP address
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landscape=true # rotate 90 degrees to the right
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output_path=/dev/video5 # display output through ffplay
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format=- # automatic output format
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webcam=true # not to a webcam
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hflip=false # horizontal flip webcam
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window_title=reStream # stream window title is reStream
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ssh_cmd() {
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echo "[SSH]" "$@" >&2
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ssh -o ConnectTimeout=1 \
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-o PasswordAuthentication=no \
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-o PubkeyAcceptedKeyTypes=+ssh-rsa \
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-o HostKeyAlgorithms=+ssh-rsa \
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"root@$remarkable" "$@"
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}
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# kill reStream on remarkable at the end.
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# shellcheck disable=SC2016
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exit_rm() {
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ssh_cmd 'kill $(pidof restream)'
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}
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trap exit_rm EXIT INT HUP
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# check if we are able to reach the remarkable
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if ! ssh_cmd true; then
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echo "$remarkable unreachable or you have not set up an ssh key."
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echo "If you see a 'Permission denied' error, please visit"
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echo "https://github.com/rien/reStream/#installation for instructions."
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trap - EXIT
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exit 1
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fi
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if ssh_cmd "[ ! -f ~/restream ] && [ ! -f /opt/bin/restream ]"; then
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echo "The restream binary is not installed on your reMarkable."
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echo "Please install it using the instruction in the README:"
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echo "https://github.com/rien/reStream/#installation"
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exit 1
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fi
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# store extra ffmpeg arguments in $@
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set --
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video_filters="colorlevels=rimin=0:rimax=29/255:gimin=0:gimax=29/255:bimin=0:bimax=29/255,transpose=3"
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# rotate 90 degrees if landscape=true
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$landscape && video_filters="$video_filters,transpose=1"
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if $webcam; then
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video_filters="$video_filters,format=pix_fmts=yuv420p"
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format="v4l2"
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# check if there is a modprobed v4l2 loopback device
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# use the first cam as default if there is no output_path already
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cam_path=$(v4l2-ctl --list-devices |
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sed -n '/^[^\s]\+platform:v4l2loopback/{n;s/\s*//g;p;q}')
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# fail if there is no such device
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if [ -e "$cam_path" ]; then
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if [ "$output_path" = "-" ]; then
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output_path="$cam_path"
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fi
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else
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echo "Could not find a video loopback device, did you"
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echo "sudo modprobe v4l2loopback"
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exit 1
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fi
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fi
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# set each frame presentation time to the time it is received
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video_filters="$video_filters,setpts=(RTCTIME - RTCSTART) / (TB * 1000000)"
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set -- "$@" -vf "${video_filters#,}"
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if [ "$output_path" = - ]; then
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output_cmd=ffplay
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window_title_option="-window_title $window_title"
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else
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output_cmd=ffmpeg
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if [ "$format" != - ]; then
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set -- "$@" -f "$format"
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fi
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set -- "$@" "$output_path"
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fi
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set -e # stop if an error occurs
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# shellcheck disable=SC2089
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restream_rs="PATH=\"\$PATH:/opt/bin/:.\" restream"
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listen_port=16789
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ssh_cmd "$restream_rs --port $listen_port --format mono" &
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sleep 1 # give some time to restream.rs to start listening
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receive_cmd="nc $remarkable $listen_port"
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# TODO: return this from stdout
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width=1872
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height=1404
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pixel_format="monob"
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# shellcheck disable=SC2086,SC2090
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$receive_cmd |
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(
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"$output_cmd" \
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-vcodec rawvideo \
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-loglevel "error" \
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-f rawvideo \
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-pixel_format "$pixel_format" \
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-video_size "$width,$height" \
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$window_title_option \
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-i - \
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"$@" \
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;
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kill $$
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)
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