Ultimate App to merge DJI and GOPRO files

[pkoi]

DJI/GoPro Merger — Technical Overview

This macOS desktop app automates organizing and merging your DJI drone and GoPro .mp4 clips into clean, continuous videos — without re-encoding.

Purpose
Merge dozens of small clips recorded by DJI drones or GoPro cameras — files like DJI_0123.MP4, MAX_0123.MP4, or GX0123.MP4 — into larger files for smooth editing or archiving.

How It Works

Scan & Filter

• 
  [] You choose a folder or drive.
  [] App scans all subfolders for .mp4 files.
  [] Only files with names starting DJI_, MAX_, or GX are matched.
  [] Size checks:
  
  DJI_: under 4GB
  
  GX and MAX_: under 12GB
• App saves: full path, prefix, size, creation date, parent folder.

Grouping

• 
  [] Files are sorted by folder and creation time.
  [] A group must:
  
  Have the same prefix.
  
  Be in the same folder.
  
  Have clips within a configurable time gap (default: 15 min).

Tree View Interface

• 
  [] Groups are shown as a tree structure.
  [] Parent: shows prefix, first-last index, total size, date.
  [] Children: full paths for each file.
  [] Double-click a file to open its folder.
• Select/deselect groups or individual files.

Pre-Merge Organization

• When you start merging:
  
  App makes a MERGE folder.
  
  Inside it, a PREMERGE folder.
  
  Each group gets its own subfolder named like the final output.
  
  Selected source files are moved there.
  
  A file list for FFmpeg is built.

FFmpeg Merge

• 
  [] Runs:
  

  ffmpeg -f concat -safe 0 -i filelist.txt -c copy outputfile.mp4

  [] -c copy: no re-encoding, lossless.
  [] Output is named:
  PREFIX_first-last_DATE.mp4
  [] Example: DJI_002-005_20240630.mp4
  [] Log file saved with the same name: DJI_002-005_20240630.log
  [] Sets the output file’s timestamp to match the first clip.

Folder Result

ROOT/
├─ MERGE/
│ ├─ PREMERGE/
│ │ ├─ DJI_002-005_20240630/
│ │ │ ├─ DJI_002.MP4
│ │ │ ├─ DJI_003.MP4
│ │ │ ├─ DJI_004.MP4
│ │ │ ├─ DJI_005.MP4
│ ├─ DJI_002-005_20240630.mp4
│ ├─ DJI_002-005_20240630.log

Technical Stack

• 
  [] Python 3 + PyQt5 for the desktop GUI.
  [] os, pathlib, shutil: file operations.
  [] subprocess: run FFmpeg.
  [] os.utime: adjust timestamps.

Perfect for: drone pilots, action cam owners, vloggers — anyone needing a clean, automated way to batch-merge clips losslessly.

 

[mavic3usa]

Nice. What about the proxy files? Can it merge those too *and* rename the extension so it can be used in DR?