DashcamMerge
Combine dashcam recordings into one MP4 while keeping the original video and audio streams whenever the source clips are compatible.
What it does
DashcamMerge is a Windows utility for combining many short dashcam recordings into one continuous file. It is designed for folders produced by dual-camera recorders and works recursively, so clips can stay in their original Event, Normal, Parking, Lapse, Front and Back folders.
The merge pipeline uses FFmpeg stream copy rather than intentional re-encoding. This keeps processing fast and avoids an additional generation of quality loss. Before merging, the program checks clips with ffprobe, reports stream compatibility and skips files that cannot be read as valid video.
Key features
- Finds MP4, MOV, TS, MKV, AVI and M4V clips recursively under the selected source folder.
- Uses dashcam-aware ordering: Event → Normal → Parking → Lapse, then Front → Back, then the 14-digit timestamp found in the filename.
- Checks every clip with ffprobe before it is included and clearly reports corrupted or unrecognized files that are skipped.
- Compares video codec, frame size, frame rate and the main audio parameters before the merge and reports mismatches.
- Shows live progress with percentage, throughput, FPS, ETA and elapsed time while FFmpeg is working.
- Validates the final output with ffprobe and reports input/output duration and size statistics.
- Remembers the last source and output folders for the next run.
- Performs an integrity check of the release executable at startup and exits if the executable appears to have been modified.
Merge modes
Tries a direct concat to MP4 first. If that path fails, the program retries through a temporary MKV and then remuxes the result to MP4. The streams are copied rather than intentionally re-encoded.
Uses the direct concat path only. If direct MP4 creation fails, the program stops instead of using the temporary-container fallback.
Combines the selected clips into one temporary TS stream and then remuxes that stream to MP4. This provides a separate recovery path for material that behaves poorly with direct MP4 concatenation.
How to use
- Start DashcamMerge and choose a merge mode. Press Enter to use Normal mode.
- Select the source folder containing the dashcam recordings. The last used folder is offered as the default on later runs.
- Select the output folder. The program scans and sorts the source clips, validates them and shows a compatibility summary.
- Review the file count, first and last clip and any warnings. The merge then runs with live progress information.
- After processing, check the reported output path, output validation result and duration comparison before using or archiving the merged file.
How clips are ordered
When recognized folder names are present, clips are grouped in the order Event, Normal, Parking, Lapse. Front-camera clips are ordered before Back-camera clips. Within the same group, a 14-digit timestamp in the filename is used when available; filename and full path provide deterministic fallbacks.
Validation and output checks
- Unreadable or unrecognized clips are excluded before the merge; if no valid clips remain, no output is created.
- Stream differences are reported before processing so codec, resolution, frame-rate or audio mismatches are visible.
- The completed output must contain playable video according to ffprobe. An invalid output file is removed instead of being left behind as a successful result.
- The program reports the summed input duration and the output duration, including the difference between them.
FFmpeg / ffprobe
DashcamMerge requires ffmpeg.exe and ffprobe.exe. It first looks next to the program and in PATH. If the tools are missing, the interactive version offers to download the appropriate FFmpeg essentials package from gyan.dev, extract ffmpeg and ffprobe, and place them next to DashcamMerge. Internet access is only needed for this optional first-time download.
Delete mode
Delete is a separate cleanup mode and does not perform a merge. It recursively selects the supported video file types under the chosen source folder, shows the number and total size, and proceeds only after the user types YES. After deletion, the program can offer to safely eject the source drive. Verify the source path and your backup before confirming this mode.
Command line
The interactive menu is the normal way to use the program. Automation is also available:
DashcamMerge.exe --source "D:\IN" --out "E:\OUT" [--no-temp|--single-ts] [--delete] [--no-menu]
Requirements and notes
- Windows x64 for the published build.
- Read access to the source recordings and write access to the selected output folder.
- FFmpeg and ffprobe available next to the application or through PATH; the interactive application can install them with confirmation if they are missing.
- For the best result, clips intended for direct concatenation should use compatible video and audio stream parameters.
- The published file is version 1.0.2.2. Use the SHA-256 value shown on the download page when you need to verify the downloaded executable independently.
File integrity
Published file SHA-256:
3581f4ebe71ff99d72adfaae958163ab04e1b04b15440dafb52cfc067c483ad3
VirusTotal report ↗ Opens the VirusTotal report for this SHA-256. VitKit does not upload the file.