ffmpeg hardware accelaration mac os

ffmpeg_hardware_acceleration_h264_videotoolbox.bash

#!/bin/bash

#Verify the quality with difference bitrate ( crf no work with h264_videotoolbox use -b:v ) 
#You can use the same audio codec change -c:a ac3 to -c:a copy i use it because it work my multimedia player
for bitrate in 500k 1000k 1500k 2500k 3000k 3500k;do 
   ffmpeg -i Movie.mkv -c:v h264_videotoolbox -c:a ac3 -b:a 128k  -y -b:v $bitrate -ss 00:01:00 -t 00:00:10 Movie_$bitrate.mp4;
done

#With 2500k bitrate 
ffmpeg -i Movie.mkv -c:v h264_videotoolbox -c:a ac3 -b:a 128k -y -b:v $bitrate -b:a 128k Movie_$bitrate.mp4;