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Levon Gevorgyan
2024-11-07 10:22:13 -06:00
parent 42cff7c8b4
commit 97b6c62e53
2 changed files with 52 additions and 28 deletions
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42
scripts/estimate_fg.sh
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@@ -1,12 +1,13 @@
#!/bin/bash
usage() {
echo "estimate_fg.sh -i input_file [-l NUM] [-s NUM] [-h NUM] [-I] [-U]"
echo -e "\t-l low value to use as minimum film-grain [optional]"
echo -e "\t-s step value to use increment from low to high film-grain [optional]"
echo -e "\t-h high value to use as maximum film-grain [optional]"
echo -e "\t-I Install this as /usr/local/bin/estimate-film-grain [optional]"
echo -e "\t-U Uninstall this from /usr/local/bin/estimate-film-grain [optional]"
echo "estimate_fg.sh -i input_file [-o output_file] [-l NUM] [-s NUM] [-h NUM] [-I] [-U]"
echo -e "\t-o file to output results to"
echo -e "\t-l low value to use as minimum film-grain"
echo -e "\t-s step value to use increment from low to high film-grain"
echo -e "\t-h high value to use as maximum film-grain"
echo -e "\t-I Install this as /usr/local/bin/estimate-film-grain"
echo -e "\t-U Uninstall this from /usr/local/bin/estimate-film-grain"
return 0
}
@@ -21,12 +22,13 @@ check_not_negative_optarg() {
echoerr() { echo -e "$@" 1>&2; }
OPTS='l:s:h:i:IU'
OPTS='o:l:s:h:i:IU'
NUM_OPTS="${#OPTS}"
# only using -I or -U
MIN_OPT=1
# using all
MAX_OPT=$NUM_OPTS
CALLING_DIR="$(pwd)"
test "$#" -lt "$MIN_OPT" && echo "not enough arguments" && usage && exit 1
test "$#" -gt "$MAX_OPT" && echo "too many arguments" && usage && exit 1
while getopts "$OPTS" flag; do
@@ -45,13 +47,16 @@ while getopts "$OPTS" flag; do
exit 0
;;
i)
if [[ "$#" -lt 2 ]]; then
echo "wrong arguments given"
if [[ ! -f "${OPTARG}" ]]; then
echo "${OPTARG} does not exist"
usage
exit 1
fi
INPUT="${OPTARG}"
;;
o)
OUTPUT_FILE="${OPTARG}"
;;
l)
check_not_negative_optarg "${OPTARG}"
LOW_GRAIN="${OPTARG}"
@@ -72,11 +77,6 @@ while getopts "$OPTS" flag; do
esac
done
if [[ ! -f "$INPUT" ]]; then
echo "file does not exist"
exit 1
fi
# set default values
test ! -n "$LOW_GRAIN" && LOW_GRAIN=0
test ! -n "$STEP_GRAIN" && STEP_GRAIN=5
@@ -172,6 +172,12 @@ segment_video() {
# ffmpeg -f concat -safe 0 -i "$SEGMENTS_LIST" -hide_banner -loglevel error -c copy "$OUTPUT_CONCAT"
}
get_output_bitrate() {
INPUT="$1"
BPS="$(ffprobe "$INPUT" 2>&1 | grep BPS | grep -v 'TAGS' | tr -d ' ' | cut -d':' -f2)"
echo "scale=3;$BPS / 1000000" | bc -l
}
encode_segments() {
cd "$SEGMENT_DIR" || exit
mkdir ./encoded || exit
@@ -183,13 +189,15 @@ encode_segments() {
do
OUTPUT_VIDEO="encoded/encoded_$VIDEO"
encode -i "$VIDEO" -g $GRAIN "$OUTPUT_VIDEO"
BITRATE="$(mediainfo "$OUTPUT_VIDEO" | tr -s ' ' | grep 'Bit rate : ' | cut -d':' -f2)"
echo -e "\tgrain: $GRAIN, bitrate:$BITRATE" >> "$GRAIN_LOG"
BITRATE="$(get_output_bitrate "$OUTPUT_VIDEO")"
echo -e "\tgrain: $GRAIN, bitrate: $BITRATE" >> "$GRAIN_LOG"
done
echo >> "$GRAIN_LOG"
done
cat "$GRAIN_LOG"
test -n "$OUTPUT_FILE" && cp "$GRAIN_LOG" "$CALLING_DIR/$OUTPUT_FILE"
less "$GRAIN_LOG"
}
get_avg_bitrate "$INPUT"