如何在iOS 9+中使用AVPlayer实施“自适应比特率”（HLS）

Question

I am trying to implement adaptive bit rate with AVPlayer but i don't know how to switch between a low/high stream. I am a bit confused and have few questions:

1. Is it the sole responsibility of the server to implement HLS on its side OR the client also has to do something about it OR the client handles it automatically?

2. I am getting the following URLs from server, can someone tell me how to switch between the them based on network speed and what other steps are involved?

{ "VideoStreamUrl": " http://50.7.149.74:1935/pitvlive/aplus3.stream/playlist.m3u8 ?", "VideoStreamUrlLow": " http://50.7.149.74:1935/pitvlive/aplus3_240p.stream/playlist.m3u8 ?", "VideoStreamUrlHD": null }

Answer 1

AVPlayer supports HLS natively from the framework so you shouldnt need to do anything to support this.

The framework will automatically switch between low and high streams according to the current available bandwidth, so you dont actually need to pick a stream.