Looking for Broken Mocap Files — Let's Fix Them Together
Hey developers! 👋
I'm building **ApexEye Clean**, an automated motion capture data cleanup system. If you've ever worked with mocap files (BVH, FBX, AMC, C3D), you know the pain:
- Jittery joints
- Feet sliding across the floor
- Bone length violations (limbs stretching)
- Impossible joint angles (pop-through)
- IK violations (knee/elbow flips, hyperextension)
- Missing/dropped frames (frozen frames, duplicates, NaNs)
- Gimbal lock / Euler flips (sudden 180° twists)
- T-pose reset frames mid-clip
- Self-intersection (limbs clipping through body)
- Retargeting artifacts (twisted limbs, hip/root offsets)
- Root drift (character wandering off-stage)
- Frame-to-frame discontinuities
**ApexEye Clean detects and fixes all of these automatically.**
I'm currently **testing manually with real community files** before launching the automated web tool. This is your chance to get early access and direct feedback.
## The Ask
If you have a broken mocap file, send it my way and I'll:
- ✅ Analyse it for free (detailed diagnostic report)
- ✅ Attempt automated cleanup
- ✅ Send you the fixed file
- ✅ Work with you to debug edge cases
All files are private and confidential. You get a free fix; I get data that makes the tool better.
## What I'm Looking For
- **Format:** BVH, FBX, AMC, C3D (any format, any size)
- **The Problem:** Jitter, sliding feet, pops, IK flips, dropped frames, gimbal flips, retarget twists, drift, impossible angles, etc.
- **Source Tool:** Rokoko, Vicon, AI video tool, phone capture, etc. (optional)
## How to Submit
📧 **Email:** marklennox@gmail.com
Include:
- The mocap file (or upload link)
- Brief description of what's wrong
- What tool created it (if you know)
Or reply in this thread!
## What Happens Next
1. You send file
2. I run diagnostic scan (~2 min)
3. You get detailed analysis report
4. I attempt cleanup
5. You get fixed file + before/after comparison
6. If something doesn't work, we iterate
I do have a day job and family so I'll get to files as quickly as I can, but overall time I’ll spend on a file could anywhere from 30mins to 6hours (we could be messaging back and forth)
## Bonus
Because you're testing early:
- **Early access** to the web tool when it launches (free tier)
- **6-month premium trial** with unlimited file cleanups
- **Free API access** for up to 100 files/month
- Optional name credit on the website
## Context
ApexEye has more scope than being just a mocap cleanup tool and comes from a multi-camera capture system that has milestones well beyond mocap. The core tech works great, but I quickly realised **the biggest pain point for creators is mocap cleanup**.
Whether you're using Rokoko, Mimem, Vicon, or AI video tools, the output is almost always imperfect. Blender's bone constraints help, but they're manual and incomplete.
ApexEye Clean automates all of it: detect 12+ quality issues, apply 6+ intelligent fixes, deliver a clean BVH/FBX. Every file you send helps me find edge cases and train the system.
## Questions?
**Q: Will you publish my file?**
A: Not without permission. I might use anonymised aggregate statistics ("reduced foot skating by 87%"), but never the actual file.
**Q: Is this to build a training dataset?**
A: Partly, yes. But you get a free cleanup and detailed report right now. Fair trade.
**Q: What if my file is confidential?**
A: I can sign an NDA. Just ask.
**Q: How long does cleanup take?**
A: Typically 2-6 hours overall depending on complexity; I test and iterate manually with you.
**Q: When will there be a web tool?**
A: I already have a basic version that covers most of the functionality but I want to validate the product first. Launching soon. Contributors get early access and premium tier free for 6 months.
Looking forward to seeing what you throw at it!
— Mark