ll-hls implementation, video flash

[fastfading]

I am trying to implement ll hls recently base on this doc
502_introducing_lowlatency_hls.pdf

we met an issue . the clock in the video is flashing

https://user-images.githubusercontent.com/8351732/147813865-a9352d24-3186-4fec-947e-29a8628400c9.mov

to simplify this issue I made a little change base on origin code , so we can quick duplicate this issue.

in this change, I cut the ts into more small segment. for example , IDR is each 6s, but I cut ts each 1s. push rtmp with obs. open hls link with safari， it will get above video result.

I am not sure why .

[fastfading]

we found this may related to obs tune if we set tune to other option except zerolatency , it will get above result. if we set tune to zerolatency, there will be no flash back issue. but will get another issue like below.

Does anyone know why ?

[fastfading]

we just find the master release also has this issue.
nothing has been changed . this should be a bug .

https://user-images.githubusercontent.com/8351732/148019790-2ea145b0-db75-491c-a177-5bffa022943d.mov

[fastfading]

应该和这段代码有关 这里 pts = dts 那么就要求编码的时候不能有B 帧 pts 和dts 最好能从源获得， 这里实现是不是有些问题

[langhuihui]

这段代码已经修改了，可以拉取最新代码看看

[DavidYou]

pts和dts问题已经修复。

还有2个问题

1. 上面提到的B帧出现马赛克
2. 最新版本TS和m3u8都在一个目录，但是m3u8里面ts会多出一级路径。 例如: stream url: rtmp://localhost:1935/live

m3u8

EXTINF:2.000,

live/1641534494.ts

EXTINF:2.000,

live/1641534496.ts

[fastfading]

1. 上面提到的B帧出现马赛克
   说的是这个问题 if we set tune to zerolatency, there will be no flash back issue. but will get another issue like below.

[DavidYou]

if we set tune to zerolatency, there will be no flash back issue. but will get another issue like below.

看来是sliced-threads=1导致的

[DavidYou]

看来是sliced-threads=1导致的

最新版本已经解决

[JuanMorenoS]

Hello @fastfading do you have this feature public?