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MF_E_NET_BWLEVEL_NOT_SUPPORTED
MF_E_NET_BWLEVEL_NOT_SUPPORTED means the source does not expose the requested bandwidth-level capability. It commonly appears when application code assumes adaptive or multi-bitrate controls that the selected source does not implement.
What to check
- Identify the actual source protocol and media server rather than assuming adaptive streaming is available.
- Do not force a bandwidth level when the source does not advertise one; use its default stream selection behavior.
- Log the presentation descriptor and source capabilities during connection setup.
Microsoft: Networking in Media Foundation
Microsoft: Supported protocols for Media Foundation network sources
Microsoft: Media Foundation client logging
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