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MF_E_TIMER_ORPHANED
MF_E_TIMER_ORPHANED belongs to Media Foundation timer scheduling. IMFTimer::SetTimer schedules an asynchronous callback at a clock time and can return a key that identifies that timer for CancelTimer.
Trace the specific timer request and its teardown path
- Log the requested clock time, timer flags, callback/state objects, and the cancellation key returned by
SetTimer. - Use the exact returned key when canceling the request; do not substitute an application timer ID or another request's key.
- Review clock, presenter, and callback-owner teardown around the orphaned request, especially when timers are scheduled while playback state is changing.
Cancellation does not prove the callback can no longer execute: Microsoft documents that CancelTimer may succeed even though asynchronous dispatch still invokes the callback. Teardown code must therefore remain safe for a late callback.
Microsoft: IMFTimer::SetTimer · Microsoft: IMFTimer::CancelTimer · Microsoft: EVR presenter scheduling
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