new script to convert videos to AV1 using Intel Quickstep

scripts/arc_convert.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+# https://forum.level1techs.com/t/ffmpeg-av1-encoding-using-intel-arc-gpu-tips/205120/2
+ffmpeg \
+  -extra_hw_frames 40 \
+  -i "$1" \
+  -init_hw_device vaapi=va:/dev/dri/renderD128 \
+  -c:v av1_qsv \
+  -preset veryslow \
+  -extbrc 1 \
+  -look_ahead_depth 40 \
+  -b:v 1M \
+  -bufsize 2M \
+  -rc_init_occupancy 512K \
+  -low_power 0 \
+  -adaptive_i 1 \
+  -adaptive_b 1 \
+  -b_strategy 1 -bf 7 \
+  "$2"