```
1) **`STREAM_START`**
- - marks the start of a stream; unlike the SEGMENT event, there
- will be no STREAM_START event after flushing seeks.
+ - marks the start of a stream; unlike the `SEGMENT` event, there
+ will be no `STREAM_START` event after flushing seeks.
2) **`SEGMENT`**, rate, start/stop, time
- marks valid buffer timestamp range (start, stop)
- marks `stream_time` of buffers (time). This is the stream time of buffers
- with a timestamp of S.start.
+ with a timestamp of `S.start`.
- marks playback rate (rate). This is the required playback rate.
- marks applied rate (`applied_rate`). This is the already applied playback
rate. (See also [trickmodes](design/trickmodes.md))