A CLI wrapper app to use ffmpeg to remove the clip from the given video file based on begin & end timestamp

remove-clip.sh

#!/bin/bash

# Check the number of arguments
if [ $# -ne 4 ]; then
  echo "Usage:"
  echo "  ${0##*/} <input> <output> <start> <end>"
  echo "Arguments:"
  echo "  input    the name of the input video file"
  echo "  output   the name of the output video file"
  echo "  start    the start time of the clip to be removed in hh:mm:ss format"
  echo "  end      the end time of the clip to be removed in hh:mm:ss format"
  exit 1
fi

# Assign the arguments to variables
input=$1
output=$2
start_hms=$3
end_hms=$4

# Check the format of the arguments
if [[ ! -f $input ]]; then
  echo "Invalid input file: $input"
  exit 2
fi

if [[ ! $start_hms =~ ^[0-9]{2}:[0-9]{2}:[0-9]{2}$ ]]; then
  echo "Invalid start time: $start_hms"
  exit 3
fi

if [[ ! $end_hms =~ ^[0-9]{2}:[0-9]{2}:[0-9]{2}$ ]]; then
  echo "Invalid end time: $end_hms"
  exit 4
fi

# Convert the hour:minute:second format to seconds
start_s=$(echo $start_hms | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }')
end_s=$(echo $end_hms | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }')

# Calculate the duration of the clip to be removed
duration=$(bc <<< "$end_s - $start_s")

# Use ffmpeg to remove the clip and save the output
ffmpeg -i $input -filter_complex "[0:v]trim=0:$start_s,setpts=PTS-STARTPTS[v1]; [0:v]trim=$end_s,setpts=PTS-STARTPTS[v2]; [0:a]atrim=0:$start_s,asetpts=PTS-STARTPTS[a1]; [0:a]atrim=$end_s,asetpts=PTS-STARTPTS[a2]; [v1][a1][v2][a2]concat=n=2:v=1:a=1[out]" -map "[out]" $output

# Print a message to indicate the completion of the task
echo "The clip from $start_hms to $end_hms has been removed from $input and saved as $output"