Hiccups when clearing buffer

[yairans]

Hi,
I would like to tell shaka do not clear the buffer when it switches between the video track automatically (when adaptation is enabled). The buffer clearing causes hiccups on IE11.
Is there a way to configure this behaviour?

Yair

[dobrusev]

I'm using DASH with Widevine and I see the same behavior - hiccuping in chrome.
Sometimes I see glitches during playback as well.

When I compare I have a better performance without glitches on the old version of shaka.

I agree with Yair. It will be nice if there is a solution in the default configuration that can be made for better performance.

[joeyparrish]

Hi Yair, Dobrin,

We are working on it and hope to release improvements in v2.0.1 as soon as feasible. Thanks!

[joeyparrish]

In a8ac314 we made buffer clearing explicit and more flexible for calls to selectTrack(). When the ABR manager is making the call, though, it still decides if/when/how to clear the buffer.

[dobrusev]

That was fast!

Thanks Joey Parrish.
I will try it now and update you guys here.

[dobrusev]

After retesting I don't see any hiccuping in chrome. And the switches between the video tracks is smooth.

Again thanks for the great work!

[joeyparrish]

The thing that fixed it was probably when we switched from clearing 10 seconds ahead to clearing 2 segments ahead. Clearing based on segment size reflects the reality of how MediaSource works, while 10 seconds was only a guess at the segment size anyway.

@yairans, can you confirm that this has improved things for you as well?

[yairans]

@joeyparrish
It plays perfect now.
Thank you.

[joeyparrish]

Excellent! Thank you for retesting.