128 lines
2.5 KiB
Bash
Executable File
128 lines
2.5 KiB
Bash
Executable File
#! /bin/sh
|
|
|
|
set -e
|
|
|
|
usage () { cat <<EOD 1>&2; }
|
|
Usage: $0 [OPTIONS...] SRC [SRC...]
|
|
|
|
Re-encodes to h.264, preserving audio and subtitles.
|
|
Output will be written to \$SRC.h264.mp4
|
|
|
|
-height H Rescale to no taller than H
|
|
-1080p Rescale to no bigger than 1080p
|
|
-720p Rescale to no bigger than 720p
|
|
-480p Rescale to no bigger than 480p
|
|
-bitrate B Set average bitrate to B, overriding rescale setting or CRF
|
|
-crf C Set CRF to C, overriding rescale setting or bitrate
|
|
-swenc Software encode instead of hardware
|
|
EOD
|
|
|
|
height=ih
|
|
codec=h264_v4l2m2m
|
|
bitrate="-b:v 2048k"
|
|
while true; do
|
|
case "$1" in
|
|
-height|--height)
|
|
height=$2
|
|
shift 2
|
|
;;
|
|
-1080p|--1080p)
|
|
height=1080
|
|
bitrate="-b:v 2048k"
|
|
shift
|
|
;;
|
|
-720p|--720p)
|
|
height=720
|
|
bitrate="-b:v 1200k"
|
|
shift
|
|
;;
|
|
-480p|--480p)
|
|
height=480
|
|
bitrate="-b:v 512k"
|
|
shift
|
|
;;
|
|
-bitrate|--bitrate)
|
|
bitrateManual="-b:v $2"
|
|
shift 2
|
|
;;
|
|
-crf|--crf)
|
|
bitrateManual="-crf $2"
|
|
shift 2
|
|
;;
|
|
-swenc|--swenc)
|
|
codec=h264
|
|
shift
|
|
;;
|
|
-*)
|
|
usage
|
|
exit
|
|
;;
|
|
*)
|
|
break
|
|
;;
|
|
esac
|
|
done
|
|
|
|
if [ "$codec" = "h264" ]; then
|
|
bitrate="-crf 28"
|
|
fi
|
|
bitrate=${bitrateManual:-$bitrate}
|
|
|
|
log () {
|
|
echo "=== $*"
|
|
}
|
|
|
|
cmd () {
|
|
nice "$@"
|
|
}
|
|
|
|
# This got a height of 719 (n%2 must = 0)
|
|
#-vf "scale='min($width,iw)':'min($height,ih)':force_original_aspect_ratio=decrease,format=yuv420p" \
|
|
|
|
for fn in "$@"; do
|
|
base=${fn%.*}
|
|
filename=$(basename "$fn")
|
|
intermediate="$base.nut"
|
|
out="$base.h264.mkv"
|
|
[ -f "$out" ] && continue
|
|
case "$fn" in *.h264.mp4) continue ;; esac
|
|
|
|
# ffmpeg has some bizarro thing where the h264_v4l2m2m codec won't write to a mkv file,
|
|
# In addition, some subtitles interfere with it too.
|
|
# Solution: transcode video + audio into an intermediate file,
|
|
# then add back any subtitles.
|
|
|
|
log "$filename - Scale/Transcode"
|
|
cmd ffmpeg \
|
|
-hide_banner \
|
|
-loglevel warning \
|
|
-stats \
|
|
-i "$fn" \
|
|
-map 0:v \
|
|
-vf "scale=-2:'min($height,ih)':force_original_aspect_ratio=decrease,format=yuv420p" \
|
|
-c:v $codec \
|
|
$bitrate \
|
|
-map 0:a \
|
|
-c:a copy \
|
|
-num_capture_buffers 16 \
|
|
-num_output_buffers 32 \
|
|
-y \
|
|
"$intermediate"
|
|
|
|
log "$filename - Add subtitles"
|
|
cmd ffmpeg \
|
|
-hide_banner \
|
|
-loglevel warning \
|
|
-stats \
|
|
-i "$intermediate" \
|
|
-i "$fn" \
|
|
-map 0:v \
|
|
-map 0:a \
|
|
-map 1:s? \
|
|
-c copy \
|
|
-y \
|
|
"$out"
|
|
|
|
rm "$intermediate"
|
|
done
|