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#!/bin/sh
usage() {
echo "Combine multiple video files that share the same pattern and extension"
echo "into a single video file."
echo ""
echo "Usage: ${0##*/} <base filename>"
echo ""
echo "Arguments:"
echo " <base filename>: The name of one of the video files to use as a pattern."
echo " For example, if your files are named video_cut1.mp4,"
echo " video_cut2.mp4, you can provide video_cut1.mp4."
echo ""
echo "Example:"
echo " ${0##*/} video_cut.mp4"
echo " This will combine all files matching video_cut*.mp4 into a single file."
exit 1
}
# Check if the correct number of arguments are provided
if [ $# -ne 1 ]; then
usage
fi
# Extract the pattern and extension from the input filename
input_file="$1"
pattern="${input_file%.*}" # This removes the extension
extension="${input_file##*.}" # This extracts the extension
# Find all video files matching the generated pattern and extension
video_files=$(ls "${pattern}"*."${extension}" 2>/dev/null)
# Check if any files are found
if [ -z "$video_files" ]; then
echo "No video files found with the pattern '${pattern}*.${extension}'."
exit 1
fi
# Create a temporary file list for ffmpeg
file_list=$(mktemp)
# Populate the file list with the found video files, properly quoting each full path
for video in "${pattern}"*."${extension}"; do
full_path=$(realpath "$video")
echo "file '$full_path'" >>"$file_list"
done
# Combine the videos into a single file using ffmpeg
output_file="${pattern}_combine.${extension}"
ffmpeg -f concat -safe 0 -i "$file_list" -c copy "$output_file" 2>/dev/null
# Clean up the temporary file
cat "$file_list"
rm -f "$file_list"
echo "All videos combined into '$output_file'."
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