README.txt
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Script Name: merge_dji_files.py

Description:
This Python script merges DJI video (MP4) and audio (WAV) files with matching identifiers (e.g., DJI_20250530075349_0003_D.MP4 and DJI_20250530075349_0003_D.WAV) into a single MP4 file. The output includes:
- The original video stream (HEVC, 3840x2160) from the MP4.
- Two stereo audio tracks:
  - The original AAC stereo audio from the MP4.
  - The WAV stereo audio, converted to AAC.

Usage:
1. Place the script in a folder containing your DJI MP4 and WAV files (e.g., C:\test).
2. Run the script using: python merge_dji_files.py
3. Press Enter to use the current directory, or enter a different folder path.
4. The merged files will be saved in a 'merged_output' subfolder.

Output:
- Merged files are saved as DJI_<identifier>_D_merged.MP4.
- The script confirms each successful merge with a message (e.g., "Successfully merged: DJI_20250530075349_0003_D_merged.MP4").

Requirements:
- Python 3.x
- FFmpeg installed and added to system PATH

Notes:
- The script excludes timecode and metadata to avoid extra tracks in video editors like Premiere Pro.
- Errors, if any, will be displayed for troubleshooting.