tc-video-generic: refactoring and croping support.
Pierre Neidhardt
parent
94e6629592
commit
362f44c319
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@ -1,7 +1,7 @@
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#!/bin/sh
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## TODO: audio quality. Copy if AAC or OGG <320k.
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## TODO: crop options.
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## TODO: crop is not correct.
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## TODO: handle srt encoding.
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if [ -z "$(command -v ffmpeg)" ]; then
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@ -14,11 +14,12 @@ _printhelp()
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cat <<EOF
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Usage: ${1##*/} [OPTIONS] FILES|FOLDERS
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Transcode FILES or files found in FOLDERS to .mkv with x264 and ogg. Output
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files are the same as the original, with time appended. You can customize
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encoding with the TC_* variables.
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Transcode FILES or files found in FOLDERS to .mkv with x264 and ogg. Black
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stripes are *not* cropped by default. Output files are the same as the original,
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with time appended.
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-c: Copy streams (no reencoding).
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-C: Enable auto-crop.
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-f: Remove source when done.
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-h: Display this help.
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-o OPT: Additional options.
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@ -40,46 +41,47 @@ Examples:
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EOF
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}
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TC_SAMPLE=""
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TC_USER_OPT=""
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TC_REMOVE_TITLE=false
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TC_VIDEO_CODEC="libx264"
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TC_AUDIO_CODEC="libvorbis"
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TC_VIDEO_OPT="-preset slow -crf 20"
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## What to do if file exists:
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# -y overwrite
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# -n do not overwrite.
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TC_OVERWRITE="-n"
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OPT_OVERWRITE=false
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SAMPLE=""
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# USER_OPT="" ## Can use environment value.
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VIDEO_FILTER=""
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VIDEO_CODEC="-c:v libx264 -preset slow -crf 20"
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## WARNING: we mix down audio to 2 channels with '-ac 2'. This greatly reduce
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## file size and avoid any confusion for playback, which is often the case when
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## converting DTS to any other format because DTS has embedded channel
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## description which is not available in other formats.
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TC_AUDIO_OPT="-b:a 192k -ac 2"
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AUDIO_CODEC="-c:a libvorbis -b:a 192k -ac 2"
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while getopts ":cfho:sS:t" opt; do
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## What to do if file exists:
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# -y overwrite
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# -n do not overwrite.
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OVERWRITE="-n"
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OPT_OVERWRITE=false
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OPT_REMOVE_TITLE=false
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OPT_CROP=false
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while getopts ":cCfho:sS:t" opt; do
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case $opt in
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c)
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TC_VIDEO_OPT=""
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TC_AUDIO_OPT=""
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TC_VIDEO_CODEC="copy"
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TC_AUDIO_CODEC="copy" ;;
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VIDEO_CODEC="-c:v copy"
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AUDIO_CODEC="-c:a copy" ;;
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C)
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OPT_CROP=true;;
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f)
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TC_OVERWRITE="-y"
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OVERWRITE="-y"
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OPT_OVERWRITE=true;;
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h)
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_printhelp "$0"
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exit 1 ;;
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o)
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TC_USER_OPT="$OPTARG" ;;
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USER_OPT="$OPTARG" ;;
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s)
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TC_SAMPLE="-ss 60 -t 360" ;;
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SAMPLE="-ss 60 -t 360" ;;
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S)
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TC_SAMPLE="-ss 60 -t $((60*$OPTARG))" ;;
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SAMPLE="-ss 60 -t $((60*$OPTARG))" ;;
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t)
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TC_REMOVE_TITLE=true ;;
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OPT_REMOVE_TITLE=true ;;
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?)
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_printhelp "$0"
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exit 1 ;;
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@ -99,40 +101,70 @@ if [ $# -eq 0 ]; then
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fi
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## Zsh compatibility. We need it otherwise word splitting of parameter like
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## TC_SAMPLE will not work.
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## SAMPLE will not work.
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STATUS="$(set -o | grep 'shwordsplit' | awk '{print $2}')"
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[ "$STATUS" = "off" ] && set -o shwordsplit
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_duration()
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{
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## In seconds.
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ffmpeg -i "$1" 2>&1 | awk '/Duration/ {split($2, time, /:|\./); print time[1]*60*60 + time[2]*60 + time[3]}'
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}
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_highfreq()
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{
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awk 'BEGIN{max=0} /crop=/ {t[$NF]++; if (t[$NF]>max) {max=t[$NF]; val=$NF}} END{print val}'
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}
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_cropvalue()
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{
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## For 5 different timeslices of 1 second at every 1/6th of the video, we
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## sample the crop values. We keep the values with highest frequency.
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STEP=$(($(_duration "$1")/6))
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for i in $(seq $STEP $STEP $((5*$STEP))); do
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echo -ss $i -t 10
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ffmpeg -ss $i -t 10 -i "$1" -vf "cropdetect=24:16:0" -f null - 2>&1
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done | _highfreq
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}
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_tc_transcode()
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{
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cat<<EOF
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================================================================================
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User options: ${TC_USER_OPT:-None}
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Sample: ${TC_SAMPLE:-No}
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Clear 'Title': $TC_REMOVE_TITLE
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File: $1
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User options: ${USER_OPT:-None}
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Sample: ${SAMPLE:-No}
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Clear 'Title': $OPT_REMOVE_TITLE
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Crop: $OPT_CROP
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================================================================================
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EOF
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STREAM_TITLE=""
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if $TC_REMOVE_TITLE; then
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if $OPT_REMOVE_TITLE; then
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STREAM_NUM=$(ffmpeg -i "$1" 2>&1 | grep -c 'Stream')
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for i in $(seq 0 $STREAM_NUM); do
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STREAM_TITLE="${STREAM_TITLE}-metadata:s:$i title= "
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done
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fi
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if $OPT_CROP; then
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VIDEO_FILTER="-vf $(_cropvalue "$1")"
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fi
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OUTPUT="${1%.*}-$(date '+%F-%H%M%S').mkv"
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ffmpeg $TC_OVERWRITE -i "$1" \
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-c:v $TC_VIDEO_CODEC $TC_VIDEO_OPT \
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-c:a $TC_AUDIO_CODEC $TC_AUDIO_OPT \
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ffmpeg $OVERWRITE -i "$1" \
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$VIDEO_CODEC $VIDEO_FILTER \
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$AUDIO_CODEC \
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-c:s copy \
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-map 0 $STREAM_TITLE \
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$TC_SAMPLE $TC_USER_OPT "$OUTPUT"
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$SAMPLE $USER_OPT "$OUTPUT"
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if $OPT_OVERWRITE; then
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rm -f "$1"
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mv -f "$OUTPUT" "${1%.*}.mkv"
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fi
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echo
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}
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for i in "$@"; do
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@ -140,19 +172,27 @@ for i in "$@"; do
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## Argument is a folder. We search for all video files in there.
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if [ -d "$i" ]; then
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## TODO: provide max-depth as option.
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while read -r j; do
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_tc_transcode $j
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done <<EOF
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$(find "$i" \( \
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-iname '*.mkv' -o \
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-iname '*.mp4' -o \
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-iname '*.avi' -o \
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-iname '*.webm' -o \
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-iname '*.flv' -o \
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-iname '*.wmv' -o \
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-iname '*.mpg' \) )
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EOF
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## WARNING: ffmpeg should not be called from within a while<<EOF loop
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## since it continues to read input while running. However IFS needs to
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## be restored for wordsplitting to work correctly.
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OLDIFS="$IFS"
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IFS="
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"
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for j in $(find "$i" \( \
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-iname '*.mkv' -o \
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-iname '*.mp4' -o \
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-iname '*.avi' -o \
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-iname '*.webm' -o \
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-iname '*.flv' -o \
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-iname '*.wmv' -o \
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-iname '*.mpg' \) ); do
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IFS="$OLDIFS"
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_tc_transcode "$j"
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IFS="
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"
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done
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IFS=$OLDIFS
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else
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## Argument is a regular file.
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