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sxmo_camera.sh: Pipe ffmpeg converted V4L2 to rawvideo data; remote X rotation

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Use ffmpeg to convert V4L2 data into rawvideo data and pipe that to mpv. This
lets us use mpv's rawvideo demuxer which is instant for transpose / rotation.
Removes the X handling of rotation.
This commit is contained in:
Miles Alan 2020-08-30 13:51:34 -05:00
parent 607ef17637
commit a426555983
1 changed files with 14 additions and 9 deletions
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23
scripts/core/sxmo_camera.sh
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@ -29,26 +29,33 @@ setupv4l2() {
}
startmpv() {
MODE="$1"
TRANSPOSE="$2"
RES="${MODE%%@*}"
SPEED="${MODE##*@}"
HEIGHT="${RES##*x}"
WIDTH="${RES%%x*}"
# -vf=transpose=1 - TODO: figure out why rotation is so slow..
mpv -v --demuxer-lavf-format=video4linux2 \
-demuxer-lavf-o=input_format=rawvideo,video_size=${WIDTH}x${HEIGHT}:framerate=$SPEED \
--profile=low-latency --untimed --fps=$SPEED --vo=xv \
av://v4l2:/dev/video1
# FFMpeg here is just converting V4L2 into rawvideo data to pipe to mpv which
# has better compatabilty with mpv's rawvideo demuxer (then v4l2 data). There
# (may) be a way to directly invoke the rawvideo demuxer with a v4l2 device
# in mpv; but this is simpler and more reliable for now.
ffmpeg -re -fflags nobuffer -f v4l2 -video_size $RES -i /dev/video1 -f rawvideo - |
mpv \
--demuxer-rawvideo-w=$WIDTH --demuxer-rawvideo-h=$HEIGHT \
--untimed --vo=xv --cache-pause=no --no-demuxer-thread \
--profile=low-latency --demuxer=rawvideo -vf transpose=$TRANSPOSE \
-
}
camerarear() {
setupmediactllinks "$REAR_LINK[0]" "$FRONT_LINK[1]"
setupv4l2 "$REAR_MODE" "$REAR_NODE"
startmpv "$REAR_MODE"
startmpv "$REAR_MODE" 1
}
camerafront() {
setupmediactllinks "$FRONT_LINK[0]" "$REAR_LINK[1]"
setupv4l2 "$FRONT_MODE" "$FRONT_NODE"
startmpv "$FRONT_MODE"
startmpv "$FRONT_MODE" 3
}
cameramenu() {
@ -59,10 +66,8 @@ cameramenu() {
if [ "$CHOICE" = "Close Menu" ]; then
exit 0
elif [ "$CHOICE" = "Rear Camera" ]; then
sxmo_rotate.sh rotright #TODO - figure out how to rotate w mpv
camerarear
elif [ "$CHOICE" = "Front Camera" ]; then
sxmo_rotate.sh rotleft #TODO - figure out how to rotate w mpv
camerafront
fi
}