Mass video splitter (ffmpeg ; originally for Twitter threads)

timecode_tsv_split_video.sh

#!/bin/bash

LINECOUNT=$(( $(wc -l timecodes.tsv | awk '{print $1}') - 1))

read -r -d '' COLUMN_HANDLER << EOF
(awk '{print \$VAR}' | awk 'BEGIN {FS=":"} {print \$2*60 + \$3}') < <(tail -n $LINECOUNT < timecodes.tsv)
EOF


TEMP=`mktemp --suffix=.tsv`

paste <(awk '{print $1}' < <(tail -n $LINECOUNT timecodes.tsv)) <(bash -c "${COLUMN_HANDLER//\$VAR/\$2}") <(bash -c "${COLUMN_HANDLER//\$VAR/\$3}") > "$TEMP"

TEMP2=`mktemp --suffix=.tsv`

awk '{print $1 "\t" $2 "\t" $3-$2}' < "$TEMP" > "$TEMP2"

parallel --bar --jobs 1 -a "$TEMP2" --colsep '\t' ffmpeg -y -i jim.mp4 -c:v h264_nvenc -c:a aac -vf crop=w=640:h=387:x=0:y=0 -ss {2} -t {3} {1}.mp4