Live Link Hub Capture Manager wont accept Video

General Issues and Bug Reporting (Unreal Engine)
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Summary

MetaHuman Animator Markerless Motion Capture ingest fails at 75% (with multiple error codes)

What Type of Bug are you experiencing?

Animation

Steps to Reproduce

  1. Open Unreal Engine 5.8.
  2. Enable MetaHuman Animator and MetaHuman Animator Markerless Motion Capture plugins.
  3. Open Live Link Hub.
  4. Add a Mono Video Ingest device.
  5. Install ffmpeg-8.1.1-essentials_build and connect it as a Third Party Encoder path in the Live Link Hub Settings (or skip for same result and other error codes)
  6. Select an MP4 video recorded on an iPhone 15 Pro.
  7. Add the video to the ingest queue.
  8. Start ingest process.
  9. Ingest reaches 75% and fails.

Expected Result

The ingest process should complete successfully and generate capture data for use in MetaHuman Animator.

Observed Result

The ingest process fails at approximately 75%.

Live Link Hub displays:
“Ingest failed”

Error codes observed WITH Third Party Encoder:

  • Error Code 5
  • Error Code 7

Error codes observed WITHOUT Third Party Encoder:

  • Ingest failed : Upload failed because the requested endpoint was not found (check the ingest server is running in UE): DESKTOP-XXXXX

  • Ingest failed: Failed to create bitmap from memory: The buffer allocated is insufficient. C Folder is empty: C:/Users/XXX/AppData/Local/CaptureManager/Working/20260618/Mono Video Ingest 1/IMG_2995_1_5DEBB9514F788C0F747D76838F406DA1/Video/video (Error code: 8)

Output Log shows:

LogHttp: Warning:
request failed,
libcurl error: 28
(Timeout was reached)

LiveLink Hub ingest server was running successfully before the failure.

Affects Versions

5.8

Platform(s)

Windows

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Additional Notes

System Information:

  • Unreal Engine 5.8
  • MetaHuman Animator Markerless Motion Capture plugin enabled
  • Windows 11
  • iPhone 15 Pro source footage
  • 1080p recording
  • Originally recorded at 60 FPS
  • Video length approximately 4 seconds

Troubleshooting already attempted:

  • Restarted Unreal Engine
  • Restarted Live Link Hub
  • Restarted PC
  • Verified plugins are enabled
  • Windows Firewall checked
  • No VPN in use
  • Windows Defender only
  • Controlled Folder Access disabled / not causing issue
  • Tested multiple Mp4/Mov Video Files
  • Changed the Output Image Pixel Format from U8 BGRA to U8 Mono

The ingest server starts successfully according to the Output Log, but the ingest process consistently fails around 75%.