ffmpeg mp4 conversion

#!/bin/bash

# Find an example file in the current folder that follows the sequence pattern
example_file=$(ls *.jpg | grep -E '\.[0-9]{4}\.jpg' | head -n 1)

# Check if a matching file was found
if [[ -z "$example_file" ]]; then
  echo "No files found matching the pattern <file_name>.####.jpg"
  exit 1
fi

# Extract the pattern by replacing the numeric part with %04d
input_pattern=$(echo "$example_file" | sed -E 's/\.([0-9]{4})\.jpg$/\.%04d\.jpg/')

# Convert the image sequence to MP4
ffmpeg -framerate 30 -i "$input_pattern" -c:v libx264 -preset slow -crf 18 -pix_fmt yuv420p output.mp4

echo "Conversion completed: output.mp4 created"