Scripts for automating my video-cutting stuff

autoedit.zsh

#!/bin/zsh

zmodload zsh/datetime

# INPUTS
INPUT_FILE=$1
START_TIME=$2

if [ -n "$3" ]; then
    CUT_END=$3
else
    CUT_END="00:00:00"
fi


# OPTIONS
MAIN_FADE_OUT_AUDIO_DURATION=10
MAIN_BLACK_LENGTH=7
MAIN_FADE_OUT_DURATION=8
LOGO_FADE_OUT_START=10
LOGO_FADE_OUT_DURATION=1


# TIME FUNCTIONS

function time_to_seconds {
    local TIME=$1
    local IFS=":" 
    read -r hour min sec <<< "$TIME"
    echo $(($hour*3600 + $min*60 + $sec))
}

function seconds_to_time {
    local SECONDS=$1
    printf "%02d:%02d:%02d\n" $((SECONDS/3600)) $((SECONDS%3600/60)) $((SECONDS%60))
}


# SHIFTING STUFF AROUND
EXT=${INPUT_FILE##*.}
BASE_NAME=${INPUT_FILE%.*}
TMP_START="$(mktemp -t tempfile).$EXT"
TMP_START_OVERLAYED="$(mktemp -t tempfile).$EXT"
TMP_REST="$(mktemp -t tempfile).$EXT"
TMP_CONCAT_FILE="$(mktemp -t tempfile).txt"
OUTPUT="${BASE_NAME}.cttc.${EXT}"

START_TIME_SECONDS=$(time_to_seconds $START_TIME)

# get the length of the video
ORIGINAL_LENGTH_SECONDS=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 $INPUT_FILE)
echo "ORIGINAL_LENGTH: $(seconds_to_time $ORIGINAL_LENGTH_SECONDS)"

CUT_END_SECONDS=$(time_to_seconds $CUT_END)

TMP_LENGTH=$(( $ORIGINAL_LENGTH_SECONDS - $START_TIME_SECONDS - $CUT_END_SECONDS ))
LENGTH=$(seconds_to_time $TMP_LENGTH)
LENGTH_SECONDS=$(time_to_seconds $LENGTH)

echo "CUTTED_LENGTH: $LENGTH"

LOGO_FADE_OUT_TOTAL_DURATION=$(($LOGO_FADE_OUT_START + $LOGO_FADE_OUT_DURATION))

START_TIME_AFTER_FADE=$(($START_TIME_SECONDS + $LOGO_FADE_OUT_TOTAL_DURATION))
MAIN_FADE_OUT_START_ABSOLUTE=$(($LENGTH_SECONDS - $MAIN_FADE_OUT_DURATION - $MAIN_BLACK_LENGTH))
MAIN_FADE_OUT_AUDIO_START_ABSOLUTE=$(($LENGTH_SECONDS - $MAIN_FADE_OUT_AUDIO_DURATION ))

LOGO_FADE_OUT_TOTAL_DURATION_HMS=$(seconds_to_time $LOGO_FADE_OUT_TOTAL_DURATION)
START_TIME_AFTER_FADE_HMS=$(seconds_to_time $START_TIME_AFTER_FADE)

echo "MAIN_FADE_OUT_START: $(seconds_to_time $MAIN_FADE_OUT_START_ABSOLUTE)"
echo "MAIN_FADE_OUT_AUDIO_START: $(seconds_to_time $MAIN_FADE_OUT_AUDIO_START_ABSOLUTE)"

# Get the video and audio codec
VENCODE=$(ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 $INPUT_FILE)
AENCODE=$(ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 $INPUT_FILE)

# Cut, add logo, fade out logo, fade out video, fade out audio
ffmpeg \
  -ss $START_TIME \
  -t $LENGTH \
  -i $INPUT_FILE \
  -loop 1 \
  -t $LOGO_FADE_OUT_TOTAL_DURATION \
  -i cover_overlay.png \
  -filter_complex "\
    [0:v][1:v]scale2ref[main][overlay];\
    [overlay]fade=out:st=${LOGO_FADE_OUT_START}:d=${LOGO_FADE_OUT_DURATION}:alpha=1[faded];\
    [main]fade=out:st=${MAIN_FADE_OUT_START_ABSOLUTE}:d=${MAIN_FADE_OUT_DURATION}[mainfaded];\
    [mainfaded][faded]overlay=enable='between(t,0,${LOGO_FADE_OUT_TOTAL_DURATION})'[outv];\
    [0:a]afade=t=out:st=${MAIN_FADE_OUT_AUDIO_START_ABSOLUTE}:d=${MAIN_FADE_OUT_AUDIO_DURATION}[outa]\
  "\
  -map "[outv]" \
  -map "[outa]" \
  -c:v $VENCODE \
  -crf 23 \
  -c:a $AENCODE \
  $OUTPUT

cut_overlay_fadeout.zsh

#!/bin/zsh

##
# usage ./cut_overlay_fadeout.zsh [inputFile] [start-time (HH:MM:SS)] [shorten-by (HH:MM:SS)]
#
# this approach fully re-encodes the video 
##

zmodload zsh/datetime


# INPUTS
INPUT_FILE=$1
START_TIME=$2

if [ -n "$3" ]; then
    CUT_END=$3
else
    CUT_END="00:00:00"
fi


# OPTIONS
MAIN_FADE_OUT_AUDIO_DURATION=10
MAIN_BLACK_LENGTH=7
MAIN_FADE_OUT_DURATION=8
LOGO_FADE_OUT_START=10
LOGO_FADE_OUT_DURATION=1


# SHIFTING STUFF AROUND
EXT=${INPUT_FILE##*.}
BASE_NAME=${INPUT_FILE%.*}
TMP_START="$(mktemp -t tempfile).$EXT"
TMP_START_OVERLAYED="$(mktemp -t tempfile).$EXT"
TMP_REST="$(mktemp -t tempfile).$EXT"
TMP_CONCAT_FILE="$(mktemp -t tempfile).txt"
OUTPUT="${BASE_NAME}.cttc.${EXT}"

# get the length of the video
ORIGINAL_LENGTH_SECONDS=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 $INPUT_FILE)

CUT_END_SECONDS=$(( $(strftime -r '%H:%M:%S' $CUT_END) - $(strftime -r '%H:%M:%S' 0:0:0) ))
ORIGINAL_LENGTH_END_CUTTED_SECONDS=$(( $ORIGINAL_LENGTH_SECONDS - $CUT_END_SECONDS ))
LENGTH=$(printf "%02d:%02d:%02d" $(($ORIGINAL_LENGTH_END_CUTTED_SECONDS/3600)) $(($ORIGINAL_LENGTH_END_CUTTED_SECONDS%3600/60)) $(($ORIGINAL_LENGTH_END_CUTTED_SECONDS%60)))
LENGTH_SECONDS=$(( $(strftime -r '%H:%M:%S' $LENGTH) - $(strftime -r '%H:%M:%S' 0:0:0) ))

echo $LENGTH_SECONDS
echo $LENGTH

LOGO_FADE_OUT_TOTAL_DURATION=$(($LOGO_FADE_OUT_START + $LOGO_FADE_OUT_DURATION))
START_TIME_SECONDS=$(( $(strftime -r '%H:%M:%S' $START_TIME) - $(strftime -r '%H:%M:%S' 0:0:0) ))
START_TIME_AFTER_FADE=$(($START_TIME_SECONDS + $LOGO_FADE_OUT_TOTAL_DURATION))
MAIN_FADE_OUT_START_ABSOLUTE=$(($LENGTH_SECONDS - $MAIN_FADE_OUT_DURATION - $MAIN_BLACK_LENGTH))
MAIN_FADE_OUT_AUDIO_START_ABSOLUTE=$(($LENGTH_SECONDS - $MAIN_FADE_OUT_AUDIO_DURATION ))

LOGO_FADE_OUT_TOTAL_DURATION_HMS=$(printf "%02d:%02d:%02d" $(($LOGO_FADE_OUT_TOTAL_DURATION/3600)) $(($LOGO_FADE_OUT_TOTAL_DURATION%3600/60)) $(($LOGO_FADE_OUT_TOTAL_DURATION%60)))
START_TIME_AFTER_FADE_HMS=$(printf "%02d:%02d:%02d" $(($START_TIME_AFTER_FADE/3600)) $(($START_TIME_AFTER_FADE%3600/60)) $(($START_TIME_AFTER_FADE%60)))

# Get the video and audio codec
VENCODE=$(ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 $INPUT_FILE)
AENCODE=$(ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 $INPUT_FILE)

# Add the overlay to the beginning of the video
ffmpeg \
  -ss $START_TIME \
  -t $LENGTH \
  -i $INPUT_FILE \
  -loop 1 \
  -t $LOGO_FADE_OUT_TOTAL_DURATION \
  -i cover_overlay.png \
  -filter_complex "\
    [0:v][1:v]scale2ref[main][overlay];\
    [overlay]fade=out:st=${LOGO_FADE_OUT_START}:d=${LOGO_FADE_OUT_DURATION}:alpha=1[faded];\
    [main]fade=out:st=${MAIN_FADE_OUT_START_ABSOLUTE}:d=${MAIN_FADE_OUT_DURATION}[mainfaded];\
    [mainfaded][faded]overlay[outv];\
    [0:a]afade=t=out:st=${MAIN_FADE_OUT_AUDIO_START_ABSOLUTE}:d=${MAIN_FADE_OUT_AUDIO_DURATION}[outa]\
  "\
  -map "[outv]" \
  -map "[outa]" \
  -c:v $VENCODE \
  -crf 23 \
  -c:a $AENCODE \
  $OUTPUT