Safe merge ffmpeg command with high precision cut

[devtweakr]

I was experimenting with custom ffmpeg commands and found a safe option which merges cuts very precisely, even when keyframe cuts are not used. The way it works, it fades the video from cut to cut to the next viable keyframe instead of leaving a black screen gap.

This is my bash script. Note the -safe 0 parameter, it seems to be the key for a flawless merge of raw cuts:

#!/bin/bash

output="output_combined.mkv"

# Create a file list for ffmpeg
file_list="file_list.txt"
> $file_list

# Add all sequential video files in the current directory to the list, sorted alphabetically
for f in *.m*; do
    if [ -e "$f" ]; then
        echo "file '$(pwd)/$f'" >> $file_list
    fi
done

# Check if the file list is not empty
if [ -s $file_list ]; then
    # Combine video files
    ffmpeg -f concat -safe 0 -i $file_list -c:v copy -c:a copy "$output"
else
    echo "No files found to process."
fi

# Clean up
rm $file_list