Decreased latency in webcam script

i3/.config/i3/scripts/webcam-toggle.sh

@@ -1,12 +1,19 @@
 #!/bin/sh
 
-pkill -f /dev/video || \
+CAMERA=${CAMERA:-/dev/video0}
+
+pkill -f "$CAMERA" || \
     mpv --title="mpv-floating-window" \
         --no-config \
         --no-osc \
         --no-input-default-bindings \
         --input-conf=/dev/null \
-        -vo=gpu \
+        --vo=gpu \
         --geometry=-0-0 \
         --autofit=30%  \
-        av://v4l2:/dev/video0
+        --profile=low-latency \
+        --untimed \
+        --demuxer-lavf-format=video4linux2 \
+        --demuxer-lavf-o-set=input_format=mjpeg \
+        --demuxer-lavf-o=video_size=320x240\
+        "$CAMERA"