HRESULT 0x80040210 (VFW_E_BUFFERS

Status / error code:

Category:

Constant name:

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Description:

DirectShow allocator buffers are still active or referenced by media samples.

Could be also:
Constant	Type	OS
EVENT_E_PER_USER_SID_NOT_LOGGED_ON	HRESULT	Windows

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EVENT_E_PER_USER_SID_NOT_LOGGED_ON	VFW_E_NOT_COMMITTED

VFW_E_BUFFERS_OUTSTANDING

VFW_E_BUFFERS_OUTSTANDING is a DirectShow HRESULT. The allocator cannot safely change or release its buffer pool while one or more media samples are still in use. This often appears during shutdown, reconnect, seek or a format change.

What to inspect

Release all application-held IMediaSample references before decommitting or rebuilding the connection.
Ensure custom filters return samples after asynchronous processing and do not keep them beyond the owning graph state.
Check worker threads and callbacks for queued samples that outlive a stop or flush request.

Forcing the graph to continue while buffers are outstanding risks use-after-free bugs. Fix the ownership or completion path instead.

Microsoft: DirectShow media samples and allocators

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