A script to run ffmpeg on all the files in a folder and remux videos

ffmpeg.sh

#!/bin/bash

# Set input and output extensions
input_ext="mkv"  # Default input extension is .mkv
output_ext="mkv"  # Default output extension is .mp4
arguments="-codec copy -map 0:v -map 0:a:2 -map 0:s -map 0:t"

# Create output directory
output_dir="$PWD/dir"
mkdir -p "$output_dir"

# Loop through all files with the specified input extension in the current directory
for file in *."$input_ext"; do
    # Check if there are files with the specified input extension
    if [ ! -f "$file" ]; then
        echo "No files with .$input_ext extension found."
        exit 1
    fi

    # Get the base file name (without extension)
    base_name="${file%.*}"

    # Define the output file path
    output_file="$output_dir/$base_name.$output_ext"

    # Convert file using ffmpeg with specified arguments
    ffmpeg -i "$file" $arguments "$output_file" -y

    # Check if conversion was successful
    if [ $? -eq 0 ]; then
        echo "Converted $file to $output_file"
    else
        echo "Failed to convert $file"
    fi
done

echo "Conversion completed. All files moved to $output_dir."