| Value | Meaning |
|---|---|
| None0 | This stream has no special attributes |
| Sparse1 | This stream is a sparse stream (e.g. a subtitle stream), data may flow only in irregular intervals with large gaps in between. |
| Select2 | This stream should be selected by default. This flag may be used by demuxers to signal that a stream should be selected by default in a playback scenario. |
| Unselect4 | This stream should not be selected by default. This flag may be used by demuxers to signal that a stream should not be selected by default in a playback scenario, but only if explicitly selected by the user (e.g. an audio track for the hard of hearing or a director's commentary track). |