Define bitrate value for starting of adaptive streaming.

[tbournez]

Hello.

Is it a way to define the bitrate for starting playback ?

We want to start our video in good quality and not with the lowest quality.

Thanks and Regards

Thomas

[joeyparrish]

We don't have a direct way to do that right now. I will add a configuration parameter for that in v2.0.

The way it works right now, your default bandwidth estimator has a hard-coded starting estimate that it uses until it collects enough data to make a good estimate. This is a property of the default estimator, but the estimator can be replaced at runtime with your own.

So here are your options before v2.0 comes out:

1. modify this.defaultEstimate_ in lib/util/ewma_bandwidth_estimator.js (default is a conservative 500kbps)
2. inject your own implementation of IBandwidthEstimator as the third argument to DashVideoSource's constructor, which can behave in any way you like
3. disable adaptation during your first playback and select a track explicitly until some time has passed and the estimator has enough data to make a good decision

Also, if your app plays multiple videos without reloading the page, you should also make sure you are always providing an explicit bandwidth estimator instance to DashVideoSource. That way, data collected from the first playback can be used to make an immediate good choice for subsequent playbacks.

[tbournez]

Thank you for your answer. I just try the first solution and it works. I'll try the 2 and 3 and choose the best. If we can have this in v2.0 it is great !!