ios - 设置 AVPlayer AVPlayerItem 缓冲区大小？

Question

用avplayer播放视频，监听loadedTimeRanges属性，播放了10分钟左右的视频，avplayer总是预加载视频，感觉开销很大，有没有办法限制预加载区域的大小？比如一半时间预加载视频？

Answer 1

我认为您正在寻找 AVPlayerItem 的 preferredForwardBufferedDuration 属性。

每个苹果:

This property defines the preferred forward buffer duration in seconds. If set to 0, the player will choose an appropriate level of buffering for most use cases. Setting this property to a low value will increase the chance that playback will stall and re-buffer, while setting it to a high value will increase demand on system resources.

参见 https://developer.apple.com/reference/avfoundation/avplayeritem/1643630-preferredforwardbufferduration?language=objc