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MILERR_MROW_READLOCK_FAILED
MILERR_MROW_READLOCK_FAILED is a Windows Media Integration Layer (MIL) HRESULT. It indicates that MIL failed to obtain the read lock required to access a shared rendering resource.
Diagnostic discriminator: Capture the shared-resource identity, current writer, and lock ownership at the first failed read lock. If access succeeds only after the writer releases the resource, diagnose contention or lock ordering rather than corrupted rendering content.
What to check for MILERR_MROW_READLOCK_FAILED
- Check lock contention, ownership, and resource lifetime for the shared object.
- Keep write-held intervals short and avoid acquiring the same resource lock in conflicting orders.
- Retry only when the API contract permits transient lock acquisition failures.
Microsoft documentation about WPF hardware-accelerated rendering
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