Check if we play LIVE

[NicolasSiver]

Hi,

What is the best approach to find that we are playing true Live now.
By true Live I mean condition when playback is near the end of playback, otherwise it means that we play content from the DVR window.

Can I utilize any sort of properties or events for such task?

Thanks

[mangui]

something like this should do the trick.

var trueLive : Boolean = (_hls.type == HLSTypes.LIVE && (hls.levels[_hls.currentLevel].duration - _hls.position) < LIVE_THRESHOLD);

up to you to define LIVE_THRESHOLD
it could be 2*hls.levels[_hls.currentLevel].targetdurationfor example

[NicolasSiver]

Is there any more precise approach?
Especially when Live manifest grows.

Library tries to be in a range of 3-4 segments when it plays Live?

[mangui]

if EXT-X-ENDLIST tag is not present, flashls does not allow to seek to a position to close to the edge of the playlist ( playlist duration - 3 target duration)
https://github.com/mangui/flashls/blob/dev/src/org/mangui/hls/stream/StreamBuffer.as#L122-L141

but you can seek before that position if you want to.
this check could eventually be removed, and the responsibility could be delegated to the application running on top of flashls ...

[NicolasSiver]

Now I have changed check on 4 * averageDuration, and it work much more better, there is no spikes, when new segment is added

[NicolasSiver]

Ok :)
These approaches with position and durations comparison don't work good enough.
It should be implemented on level of library.
Where do you recommend to start?

Idea:
Check which fragment now plays, if it's very latest (considering all rules, like don't touch last 3 segments, etc.) - return true.

Also I think, for Live, 3 segments It's too much of delay.

Perfect: playing current, and one segment ahead awaits.
Current Implementation: playing current, and nearly 3 segments ahead await. If you will take best practices for segment sizes for Live, It's near 30 second of delay...