scripts/rec: use fish/vaapi

scripts/rec

@@ -1,17 +1,19 @@
-#!/bin/sh
+#!/usr/bin/env fish
 
-record() {
+function record
   sleep 2
-  ffmpeg -f x11grab -r 30 -s 1920x1080 -i :0.0 -f alsa -i recorder \
-    -c:v libx264 -preset ultrafast \
+  withcap sys_admin -- ffmpeg -f alsa -i recorder \
+    -vaapi_device /dev/dri/renderD128 -f kmsgrab -i - -r 60 \
+    -vf 'hwmap=derive_device=vaapi,scale_vaapi=w=1920:h=1080:format=nv12' \
+    -c:v hevc_vaapi -qp 21 \
     -c:a libopus -b:a 96k -ac 2 -ar 48000 \
     -y recording.mkv >/dev/null 2>&1 &
-}
+end
 
-if test "$1" = start; then
-  fish -ic 'set -U AUDIO record'
-  record &
+if test ! -f recording.mkv
+  set -xU AUDIO_OUT record
+  record
 else
-  fish -ic 'set -U AUDIO'
+  set -xU AUDIO_OUT
   pkill ffmpeg
-fi
+end