Auto Grouping

How Synclay automatically detects and groups recordings from the same session.

How Auto Grouping Works

Synclay watches your folder for video files. When multiple cameras record the same session, their files have overlapping timestamps. Synclay compares file creation times and groups videos that started within a few seconds of each other.

  1. Select a folder containing video files.
  2. Synclay scans file metadata (creation timestamps).
  3. Videos with overlapping recording times are grouped together.
  4. A group card appears in the List View showing all matched files.

GoPro Chapter Auto-Concat

GoPro cameras split long recordings into ~4 GB chapter files. Synclay detects GoPro HERO6+ naming patterns and automatically stitches chapters into a single continuous video.

The first chapter is named GX01NNNN.MP4, and continuation chapters are named GX02NNNN.MP4, GX03NNNN.MP4, and so on. Files with the same last 4 digits belong to the same recording and are stitched together automatically.

Warning: Do not rename GoPro files. Auto-concat depends on the original GoPro naming convention (GX01NNNN, GX02NNNN, ...). Renamed files will not be stitched.

Troubleshooting

If videos are not being grouped together, check that the files are from the same session — they must have overlapping creation timestamps. Files recorded at different times will appear as separate entries in the List View.

Tip: If auto-grouping misses a pair, you can always group them manually. See the Manual Grouping guide.