Unique session ID
You can use either a unique segment number or a unique session ID.
The encoder must not introduce any other changing parameters such as frequently changing time stamps in the URL path. For example, if the URL path format was: eventname/sessionID/bitrateID/post-timestamp_sequence#.ts
post-timestamp parameter creates another set of
directories for each .ts file — a condition that would cause excess directories and
possible timeouts over long periods of time.
Ideally, the path would appear as follows: eventname/sessionID/bitrateID/somename-starttime-sequence#.ts
In this case, only the sequence# changes, which is the desired behavior.