Cut a part of a video with FFMPEG

ffmpeg-cut.sh

#!/bin/bash

# Cut a part of a video with FFMPEG

if [[ $# -eq 0 ]] ; then
    echo "Usage:"
    echo "  $0 <filename> <start position timestamp> <duration> [additional params]"
    echo ""
    echo "Example:"
    echo "  Cut 50 seconds starting from timestamp 01:23:45 from file myvid.mp4"
    echo "  $0 myvid.mp4 01:23:45 00:00:50"
    echo ""
    exit 0
fi

if [[ $# -lt 3 ]] ; then
    echo "No enough parameters"
    exit 1
fi


# File name to read from
FNAME=$1

if [[ ! -f "$FNAME" ]]; then
    echo "Not a file: $FNAME"
    exit 1
fi

# Timestamp
TSTAMP=$2

# Duration
DURATION=$3

shift
shift
shift

PARAMS="-hide_banner -avoid_negative_ts make_zero -async 1 -strict -2"
PARAMS="$PARAMS -c copy"
#echo "$PARAMS"

if [[ "$PREVIEW" == "1" ]]; then
  ffplay -ss $TSTAMP -t $DURATION $PARAMS -volume 20 -loop 0 "$@" "$FNAME"
  exit 0
fi


NEWNAME=${FNAME%.*}-cut-ts${TSTAMP//:/}-d${DURATION//:/}.${FNAME##*.}
ffmpeg -ss $TSTAMP -i "$FNAME" -to $DURATION $PARAMS "$@" "$NEWNAME"