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Transcodes input video file to use the h265/HEVC codec
#!/bin/bash
# Transcodes input video file to use the h265/HEVC codec.
# Outputs the same filename but with x264/h264/xvid/etc. replaced with HEVC.
sed=sed
if type gsed >/dev/null 2>&1; then
sed=gsed
fi
get_streams() {
ffprobe "$1" 2>&1 | grep -e '^\s*Stream' | "$sed" -e 's/^[[:space:]]*//'
}
is_hevc() {
echo "$1" | grep 'Video: hevc' >/dev/null
}
r() {
"$sed" "s/$1/HEVC/ig"
}
add_hevc() {
local replaced="$(echo "$1" | r "x.\?264" | r "h.\?264" | r xvid | r divx)"
local extension="$2"
local base="${replaced%.*}"
echo "${base}" | grep -i HEVC >/dev/null
if [ $? -ne 0 ]; then
# nothing changed, so just tack on hevc at the end
base="${base}.HEVC"
fi
echo "${base}.${extension}"
}
convert_to_hevc() {
input="$1"
shift
streams="$(get_streams "${input}")"
if is_hevc "${streams}"; then
echo "\"${input}\" is already in HEVC format, bailing…"
exit
fi
output="$(add_hevc "${input}" mkv)"
echo "Converting \"${input}\" to \"${output}\""
ffmpeg \
-hide_banner \
-y \
-ss 0 \
-i "${input}" \
-map_metadata 0 \
-map_chapters 0 \
-c:v libx265 -preset medium -x265-params \
crf=22:qcomp=0.8:aq-mode=1:aq_strength=1.0:qg-size=16:psy-rd=0.7:psy-rdoq=5.0:rdoq-level=1:merange=44 \
-c:a copy \
-c:s copy \
"${output}" < /dev/null
}
for i in "$@"; do
convert_to_hevc "$i";
done
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