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MF_E_ASF_UNSUPPORTED_STREAM_TYPE
MF_E_ASF_UNSUPPORTED_STREAM_TYPE means the WMContainer/ASF path does not support the stream type being configured or parsed. This is more specific than a generic media-type negotiation failure.
Inspect the ASF stream configuration
Enumerate the streams in the IMFASFProfile, log each stream number, major type, subtype, and stream configuration attributes, and identify which stream is being passed to the failing component. The ASF profile supplies stream configuration to the ContentInfo object and multiplexer.
Do not assume that a codec installed for playback makes every ASF stream type valid for WMContainer authoring. The container layer and the decode/encode transform layer have separate responsibilities. If third-party ASF content is involved, compare how another ASF implementation classifies the same stream GUID and payload before changing the Media Foundation topology.
Microsoft: ASF support and WMContainer layer · Microsoft: multiplexer stream configuration · FFmpeg ASF demuxer source
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