replay stops after last segment created

[josepowera]

When running x9k3 with "replay" x9k3 stops on last segment and does not anymore update index file, or write new segment .ts files.

If I fully understand --replay it should keep "faking" continous live stream with updated index.m3u8 and (?maybe) new created .ts files. Everything seems OK until last segment.

---

x9k3 started with:
x9k3 -i longb.ts --replay
No sidecar / scte35 injection or anything similar was used.

Used version:

x9k3 --version
0.1.57

After some time (approxy 150 seconds) last index.m3u8 was created:

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:3
#EXT-X-MEDIA-SEQUENCE:27
#EXT-X-DISCONTINUITY-SEQUENCE:0
#EXTINF:5.338,
seg27.ts
#EXTINF:5.339,
seg28.ts
#EXTINF:5.339,
seg29.ts
#EXTINF:5.338,
seg30.ts
#EXTINF:5.339,
seg31.ts

This fill remained static after that - no further changes occured to index.m3u8.

This are last moments of x9k3 (I waited until index.m3u8 stopped changing, then after a few seconds I pressed CTRL-C)

deleting ./seg22.ts
./seg28.ts	start: 140.238000	duration: 5.339000	stream diff: 3.712951
deleting ./seg23.ts
./seg29.ts	start: 145.577000	duration: 5.339000	stream diff: 3.65278
deleting ./seg24.ts
./seg30.ts	start: 150.916000	duration: 5.338000	stream diff: 3.595596
deleting ./seg25.ts
./seg31.ts	start: 156.254000	duration: 5.339000	stream diff: 3.549967
deleting ./seg26.ts
^CTraceback (most recent call last):
  File "/home/uporabnik/.local/bin/x9k3", line 5, in <module>
    cli()
  File "/home/uporabnik/.local/lib/python3.8/site-packages/x9k3.py", line 811, in cli
    stuff.run()
  File "/home/uporabnik/.local/lib/python3.8/site-packages/x9k3.py", line 795, in run
    self.loop()
  File "/home/uporabnik/.local/lib/python3.8/site-packages/x9k3.py", line 778, in loop
    if not self._find_start():
  File "/home/uporabnik/.local/lib/python3.8/site-packages/threefive/stream.py", line 154, in _find_start
    one = self._tsdata.read(1)
KeyboardInterrupt

input stream file used was taken from slo.me....

wget https://so.slo.me/longb.ts
ls -l longb.ts
-rw-rw-r-- 1 uporabnik uporabnik 59287492 Oct  4  2021 longb.ts

[futzu]

I think I know what is causing that... give me a minute.

[futzu]

This should fix it.

python3 -mpip install --upgrade x9k3

[josepowera]

This fix solved issue above (replay stops after last segment created). THX!

However there must be another thing, since the play on segments with EXT-X-DISCONTINUITY does not continue smooth. Same source file as above. Same config, just updated x9k3 version to new. Problem detected with ~seg32.ts, ...seg134.ts, seg187.ts ...

When testing in browser using VideoJS 7 in Chrome on windows 10, I see some report in console of browser around segment with EXT-X_DISCONTINUITY (this is I believe where stream is restarted from beggining):
Segment with index 3 from playlist 0-https://edited.com/variant0/index.m3u8 has a duration of 10.431999999999988 when the reported duration is 5.339 and the target duration is 3. For HLS content, a duration in excess of the target duration may result in playback issues. See the HLS specification section on EXT-X-TARGETDURATION for more details

and video player stops and browser is re-fetching same segments a few time (in should normally just move on) then stops.

[futzu]

Is that with the longb.ts video?

[josepowera]

yes, longb.ts

[futzu]

Dude, that's just some random on my server, I would not use that for any kind of testing.
At least re-encode it, I don't even know what codec it uses to be honest with you.

When I get some time I will look at the discontinuity issue.

[futzu]

I double reset the stream when I fixed the loop, wait 10 mins and run pip again.

If you are using something with a big GOP like that , you can adjust the seconds with the -t switch and
that will up the target duration.

target duration is hard to predict,
You cannot change the target duration on a playlist,
and the you cant just make it a big number because target duration *3 cannot exceed the total seconds of the playlist.

longb is a kick ass video though, I ride longboards.