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MF_E_NET_REQUIRE_NETWORK
MF_E_NET_REQUIRE_NETWORK indicates that the operation cannot complete without reaching a network source. It is not a media-format diagnosis.
What to check
- Verify that the URL is reachable from the same security context as the player or service.
- Check offline-mode, captive portal, proxy, and firewall state before retrying.
- Confirm that the application did not attempt to resolve or open the source after its network stack was intentionally shut down.
Microsoft: Networking in Media Foundation
Microsoft: Supported protocols for Media Foundation network sources
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