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#!/bin/bash
set -e
die() {
echo $1
exit 1
}
[ $# = 0 ] && die 'No input file name.'
fname="$1"
output="$1.mp4"
bitrate=11000k
if [ -f "$output" ] ; then
printf 'Output file exists: %s. Override? [yN] ' "$output"
read answer
case "$answer" in
[yY]) ;;
*) exit 0;;
esac
fi
vcodec_opts="-preset medium -level 4.1 -r 25 -b:v $bitrate -bt $bitrate -s hd1080 -aspect 16:9"
ffmpeg -v warning -i "$fname"\
-vcodec libx264 $vcodec_opts\
-an\
-pass 1\
-f mp4 -y /dev/null
ffmpeg -v warning -i "$fname"\
-vcodec libx264 $vcodec_opts\
-acodec libmp3lame -ab 256k\
-pass 2\
-y "$output"
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