#!/bin/sh
src=$1
dst=${1%.*}.mp4
bak=${1%.*}.orig.${1##*.}
sqldb=convert.db
sqlinit() {
[ -f "$1" ] || sqlite3 "$1" 'CREATE TABLE encodings(path TEXT PRIMARY KEY NOT NULL, orig TEXT, backup TEXT, origsize INT, newsize INT)'
}
restore() {
rm -f "$dst"
mv "$bak" "$src"
}
sqlinit "$sqldb"
[ -f "$src" ] || exec echo "fail to open $dst"
[ -f "$bak" ] && exec echo "backup $bak already exists"
exist=$(sqlite3 "$sqldb" "SELECT count(*) FROM encodings WHERE path = '$dst' OR orig = '$src'")
[ "$exist" -gt 0 ] && exec echo "$dst already converted"
mv "$src" "$bak"
echo "Converting \"$dst\""
#if /usr/local/bin/ffmpeg -v 16 -y -vaapi_device /dev/dri/renderD128 -i "$bak" -vf format=nv12,hwupload -c:v h264_vaapi -c:a libfdk_aac -vbr 4 "$dst" && [ -s "$dst" ]; then
#if ffmpeg -v 16 -y -vaapi_device /dev/dri/renderD128 -i "$bak" -vf format=nv12,hwupload -c:v h264_vaapi -c:a copy -qp 24 "$dst" && [ -s "$dst" ]; then
if ffmpeg -v 16 -y -i "$bak" -crf 22 -preset slow -c:a copy "$dst" && [ -s "$dst" ]; then
origsize=$(stat "$bak" -c %s)
newsize=$(stat "$dst" -c %s)
save=$((newsize * 100 / origsize))
echo "$((origsize >> 20)) => $((newsize >> 20)) MB, $save %"
if [ $save -le 90 ]; then
sqlite3 "$sqldb" "INSERT INTO encodings VALUES('$dst', '$src', '$bak', $origsize, $newsize)"
else
echo 'restoring old file'
sqlite3 "$sqldb" "INSERT INTO encodings VALUES('$src', NULL, NULL, NULL, NULL)"
restore
fi
else
echo 'error, restoring'
restore
fi
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