Optimize DJI drone videos to reduce file size while maintaining acceptable quality / published by https://github.com/dacr/code-examples-manager #dd1484da-3678-4dd1-8c4a-6706dfd83b88/483b12d17643b0835f7d0d1bf0aed75291389d92

dji-mp4-optimize.sh

## summary : Optimize DJI drone videos to reduce file size while maintaining acceptable quality
## keywords : bash, ffmpeg, dji, dji-air, dji-air-3s, air, ai3s
## publish : gist
## authors : David Crosson
## license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
## id : dd1484da-3678-4dd1-8c4a-6706dfd83b88
## created-on : 2025-07-07T19:18:17+02:00
## managed-by : https://github.com/dacr/code-examples-manager
## run-with : sh $file

# Optimization parameters:
# -c:v libx264    : Use H.264 video codec
# -crf 28         : Constant Rate Factor (18-28 is good, higher = smaller file, lower = better quality)
# -an             : Disable audio (DJI videos have no sound)
# -movflags +faststart : Optimize for web streaming

# Enable case-insensitive globbing
shopt -s nocaseglob

for INPUT in *.mp4; do
  # Extract the extension with its original case
  EXT="${INPUT##*.}"
  # Create output filename by replacing the original extension
  OUTPUT=$(basename "$INPUT" ".$EXT")-optimized.mp4
  echo "====================================================================="
  echo "-- optimizing '$INPUT' to '$OUTPUT'"
  echo "---------------------------------------------------------------------"
  if [ ! -f "$OUTPUT" ]; then
    ffmpeg \
       -i "$INPUT" \
       -c:v libx264 -crf 28 \
       -an \
       -movflags +faststart \
       "$OUTPUT"
  else
    echo "Output file '$OUTPUT' already exists, skipping."
  fi
done