[Windows] App hangs on Main thread on openMedia native call

[NickKhalow]

Unity version

6000.4.0f1

Unity editor platform

Windows

AVPro Video edition

Ultra

AVPro Video version

3.3.6

Device hardware

not HW-specific; 26 distinct reports.

Which Windows version are you using?

11 (builds 26100/26200)

Graphics API

D3D 11

Video API

WinRT

Audio output

Unity

Any other Media Player component configuration required to reproduce the issue.

Repro steps are unknown

Which output component(s) are you using?

Resolve to RenderTexture

Any other component configuration required to reproduce the issue.

The issue

We're seeing repeated main-thread hangs that are currently reproducible in production. Every captured callstack terminates at the same place: a call into Native_OpenMedia. Once execution enters that native API, the main thread blocks and never returns - at which point a minidump is captured by our ANR (Application Not Responding) system.

• ANR integration: DclAnrIntegration.cs (https://github.com/decentraland/unity-explorer/blob/dev/Explorer/Assets/DCL/PerformanceAndDiagnostics/Diagnostics/ReportsHandling/Sentry/DclAnrIntegration.cs)
• Reproducible on latest release: v0.150.0-alpha
  (https://github.com/decentraland/unity-explorer/releases/tag/v0.150.0-alpha)

We found that All 26 captured sessions share the identical hang signature - the main thread parked inside Native_OpenMedia. We were unable to determine the root cause ourselves because we don't have symbols for AVProVideoWinRT.dll, so the call stack goes dark once it crosses into the plugin's native code.

For the context, we will provide:

• Callstacks from all 26 sessions - attached as a .zip archive.
• Full application source - the Decentraland Explorer is largely open-source, so you can review all of our integration code in the repository: decentraland/unity-explorer (https://github.com/decentraland/unity-explorer).

Media information

Stack traces
avpro-filter.zip

Log output

Stacktraces of DMP files are attached above