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MF_E_ASF_NOINDEX
MF_E_ASF_NOINDEX means the ASF operation needs an appropriate index but the content does not provide one that can satisfy the request. The ASF indexer is a distinct WMContainer component used to read existing indexes or generate new ones.
Determine whether the operation really requires an index
- For seeking, inspect the selected stream and index type before calling
GetSeekPositionForValue. - Confirm that the index byte streams were supplied to the indexer and initialized for read mode.
- For generated content, create and commit the required index instead of assuming the media sink will retroactively provide every index type.
Sequential playback may work without the index that a random-access or indexed lookup requires. That distinction is useful when the same ASF file plays from the beginning but fails on seek.
Microsoft: IMFASFIndexer read and write modes · Microsoft: using an ASF index to find packet offsets · FFmpeg ASF demuxer source
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