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Arkadiusz Wieczorek 2022-07-13 08:43:35 +02:00
commit f78ed50a7c
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75
change-length-audio.sh Executable file
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#!/bin/bash
# usage: change-length.sh 1.007 input.mp4 output.mp4 [--fast]
# ^output.mp4 will be be 7% longer
# --fast is faster, but slightly more risky
set -euo pipefail
RATIO=$1;
IN_FILE=$2;
OUT_FILE=$3;
MODE=${4-"--slow"};
# BITRATE=$(ffmpeg -i "$IN_FILE" 2>&1 | grep bitrate | awk -F", " '{print $3}' | sed 's/bitrate: //' | sed 's/ //' | sed 's/b\/s//' || echo "");
echo ratio set to "$RATIO"
INV_RATIO=$(python -c "print(1/$RATIO)");
FILTER="";
OPTS=();
AUDIO_FILTER="[0:a]atempo=$(echo "$INV_RATIO")[a]";
HAS_AUDIO=$(ffprobe "$IN_FILE" 2>&1 | grep Stream | grep --count Audio || echo "0");
HAS_VIDEO=$(ffprobe "$IN_FILE" 2>&1 | grep Stream | grep --count Video || echo "0");
slow () {
echo " ";
echo " ";
echo " ";
echo " ";
echo "USING SLOW MODE. If you want only video, use --fast";
echo " ";
echo " ";
echo " ";
echo " ";
echo " ";
echo " ";
echo " ";
echo "Checking streams within the file...";
if [ "$HAS_AUDIO" -ge 0 ]; then
FILTER=$AUDIO_FILTER;
OPTS+=(-map "[a]");
fi;
if [ "$HAS_VIDEO" -ge 0 ]; then
FILTER="$FILTER;[0:v]setpts=$RATIO*PTS[v]";
OPTS+=(-map "[v]");
fi;
echo "running with filter $FILTER";
# ffmpeg -i "$IN_FILE" -b:v $BITRATE -filter_complex "$FILTER" "${OPTS[@]}" "$OUT_FILE";
ffmpeg -i "$IN_FILE" -filter_complex "$FILTER" "${OPTS[@]}" "$OUT_FILE";
}
fast (){
if [ "$HAS_AUDIO" -ge 0 ]; then
TEMP_VIDEO="$(dirname $IN_FILE)/.temp.$(random).video.$(basename "$IN_FILE")";
ffmpeg -itsscale "$RATIO" -i "$IN_FILE" -c copy -an "$TEMP_VIDEO";
TEMP_AUDIO="$(dirname $IN_FILE)/.temp.$(random).audio.$(basename "$IN_FILE")";
ffmpeg -i "$IN_FILE" -filter_complex "$AUDIO_FILTER" -vn -map "[a]" "$TEMP_AUDIO";
ffmpeg -i "$TEMP_VIDEO" -i "$TEMP_AUDIO" -c:v copy -c:a copy "$OUT_FILE";
rm -f "$TEMP_AUDIO" "$TEMP_VIDEO";
else
ffmpeg -itsscale "$RATIO" -i "$IN_FILE" -c copy -an "$OUT_FILE";
fi;
}
if [ "$MODE" = "--fast" ]; then
fast;
else
slow
fi;

75
change-length-video-HWACCEL.sh Executable file
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#!/bin/bash -x
# usage: change-length.sh 1.007 input.mp4 output.mp4 [--fast]
# ^output.mp4 will be be 7% longer
# --fast is faster, but slightly more risky
set -euo pipefail
RATIO=$1;
IN_FILE=$2;
OUT_FILE=$3;
MODE=${4-"--slow"};
BITRATE=$(ffmpeg -i "$IN_FILE" 2>&1 | grep bitrate | awk -F", " '{print $3}' | sed 's/bitrate: //' | sed 's/ //' | sed 's/b\/s//' || echo "");
echo ratio set to "$RATIO"
INV_RATIO=$(python -c "print(1/$RATIO)");
FILTER="";
OPTS=();
AUDIO_FILTER="[0:a]atempo=$(echo "$INV_RATIO")[a]";
HAS_AUDIO=$(ffprobe "$IN_FILE" 2>&1 | grep Stream | grep --count Audio || echo "0");
HAS_VIDEO=$(ffprobe "$IN_FILE" 2>&1 | grep Stream | grep --count Video || echo "0");
slow () {
echo " ";
echo " ";
echo " ";
echo " ";
echo "USING SLOW MODE. If you want only video, use --fast";
echo " ";
echo " ";
echo " ";
echo " ";
echo " ";
echo " ";
echo " ";
echo "Checking streams within the file...";
if [ "$HAS_AUDIO" -ge 0 ]; then
FILTER=$AUDIO_FILTER;
OPTS+=(-map "[a]");
fi;
if [ "$HAS_VIDEO" -ge 0 ]; then
FILTER="$FILTER;[0:v]setpts=$RATIO*PTS,hwupload[v]";
OPTS+=(-map "[v]");
fi;
echo "running with filter $FILTER";
ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi -vaapi_device /dev/dri/renderD128 -i "$IN_FILE" -b:v $BITRATE -filter_complex "$FILTER" "${OPTS[@]}" -c:v h264_vaapi "$OUT_FILE";
# ffmpeg -i "$IN_FILE" -filter_complex "$FILTER" "${OPTS[@]}" "$OUT_FILE";
}
fast (){
if [ "$HAS_AUDIO" -ge 0 ]; then
TEMP_VIDEO="$(dirname $IN_FILE)/.temp.$(random).video.$(basename "$IN_FILE")";
ffmpeg -itsscale "$RATIO" -i "$IN_FILE" -c copy -an "$TEMP_VIDEO";
TEMP_AUDIO="$(dirname $IN_FILE)/.temp.$(random).audio.$(basename "$IN_FILE")";
ffmpeg -i "$IN_FILE" -filter_complex "$AUDIO_FILTER" -vn -map "[a]" "$TEMP_AUDIO";
ffmpeg -i "$TEMP_VIDEO" -i "$TEMP_AUDIO" -c:v copy -c:a copy "$OUT_FILE";
rm -f "$TEMP_AUDIO" "$TEMP_VIDEO";
else
ffmpeg -itsscale "$RATIO" -i "$IN_FILE" -c copy -an "$OUT_FILE";
fi;
}
if [ "$MODE" = "--fast" ]; then
fast;
else
slow
fi;