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MF_E_NET_BUSY
MF_E_NET_BUSY means the requested resource is busy. This can be a server-side exclusive operation, a publishing point transition, or a client attempt to reuse a resource before the previous operation has ended.
What to check
- Identify the resource that is busy: session, publishing point, encoder input, or cached object.
- Wait for the existing operation to complete instead of starting competing requests.
- Check server-side concurrency limits and lifecycle events.
Microsoft: Windows Media Services publishing points
Microsoft: Media Foundation client logging
Microsoft: Networking in Media Foundation
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