Sharing Sessions with .mef Files — FAQ
What is a .mef file?
A .mef file is MotionEdge's native session format. It packages an entire practice session — every swing video, all your Watch sensor data, AI analyses, pose data, annotations, and attachments — into a single file you can share or move between devices.
Think of it like a zipped folder of your whole session. Everything travels together, and everything arrives intact on the other end.
What's included in a .mef file?
Everything. When you export a session, the .mef file contains:
- All swing videos — primary angle, face-on, down-the-line (every angle you recorded)
- Apple Watch data — tempo, hand speed, release metrics, hand path — all the sensor data from your Watch session
- Pose data — the skeleton landmarks MotionEdge detected in your videos
- AI coaching analyses — any AI analysis results you've generated
- Thumbnails and key frames — saved frames and filmstrip images
- Session metadata — session name, date, location, notes
- Attachments — photos, voice memos, or other files you attached to the session
Nothing is left behind. The session you import is identical to the one you exported.
How do I export a session?
- Go to the Sessions tab and tap on a session to open the Session Hub
- Tap the overflow menu (⋯) in the top-right corner of the Session Hub
- Tap "Export Session (.mef)"
- MotionEdge packages the session — you'll see a progress bar
- When it's ready, tap "Share" to send via AirDrop, Messages, Mail, or save to Files
That's it. The .mef file is ready to go wherever you need it.
How do I import a .mef file?
From AirDrop, Messages, or Mail: Just open the .mef file. MotionEdge recognizes the format automatically and shows you a preview — session name, number of swings, when it was exported. Tap "Import" and the session appears in your library.
From within MotionEdge: Go to the Sessions tab → tap the overflow menu (⋯) in the top-right of the Sessions list → "MotionEdge (.SSF)" → browse to the .mef file in the file picker. You can also import from the All Swings tab using the same overflow menu.
If you've already imported this session before, MotionEdge warns you so you don't create duplicates accidentally. You can still import it again if you want a fresh copy.
Capture on phone, analyze on iPad or Mac
This is one of the best uses for .mef files. Your workflow can look like this:
- At the range: Record swings on your iPhone with your Apple Watch capturing sensor data
- Export: When your session is done, export the .mef file
- AirDrop to your iPad or Mac: The session transfers in seconds over AirDrop
- Analyze on the big screen: Review your videos, run AI analysis, compare swings — all on a larger display with more screen real estate
The iPad is especially good for side-by-side video review and drawing annotations. Everything from your phone session — including all the Watch metrics — is right there.
Share with a friend
Filmed your buddy at the range? Export the session and send it to them:
- AirDrop — fastest if they're standing next to you
- Messages or Mail — works for anyone, anywhere
- Files / cloud storage — save to iCloud Drive, Dropbox, or Google Drive and share the link
When your friend opens the .mef file in MotionEdge, they get the complete session — every video, every metric, every analysis you ran. They can review it, run their own AI analysis, and see exactly what you saw.
Share with a coach
If your coach uses MotionEdge, .mef files make lesson prep effortless:
- Before your lesson: Export your latest practice sessions and send them to your coach
- Your coach imports them and can review your swings, check your Watch metrics, and run AI analysis — all before you walk in the door
- During the lesson: Your coach already knows what you've been working on and can focus lesson time on what matters
Your coach gets the full picture — not just a video clip, but your tempo data, hand speed trends, release quality scores, and any notes or annotations you've made.
How big are .mef files?
It depends on how many swings you recorded and how many camera angles you used. Rough guide:
| Session size | Approximate .mef file size |
|---|---|
| 5 swings, single angle | ~100–150 MB |
| 10 swings, single angle | ~200–300 MB |
| 10 swings, two angles | ~350–500 MB |
Video files are the main contributor. The sensor data, poses, and analyses are tiny by comparison.
Will I lose anything when exporting and importing?
No. The .mef format preserves full fidelity — what you export is what you import. Videos, Watch data, AI analyses, pose landmarks, annotations, attachments — everything round-trips cleanly.
The only change: the imported session gets a new internal ID (so it doesn't conflict with the original on your device) and the session name gets "(Imported)" appended so you can tell them apart.
Can I open .mef files on a device without MotionEdge?
A .mef file is technically a ZIP archive, so you can rename it to .zip and browse the contents — you'll see the video files, JSON data, and images. But to get the full experience (metrics, overlays, AI analysis, Watch data integration), you need MotionEdge installed.