影音输出: 官方说法有两种方式 A:c to c,协议是 dp 协议,官方建议使用雷电 3 c to c 数据线,最大支持分辨率 5k。 B:c to hdmi2.0/1.4 芯片大多数是 ps176,协议是 dp 转 hdmi,2.0 版本支持 4k@60,1.4 版本支持 4k@30,苹果官方转接线是 hdmi1.4,且 home 界面只支持 1080p@60,需在显示设置中调整自适应内容,播放相应内容时才会跳转到 4k@30
引用自: you can connect iPad Pro to an HDMI display or TV with a USB-C to HDMI adapter. Adapters that support HDMI 2.0 can output video from iPad Pro at 4K resolution and 60Hz.
The Apple USB-C Digital AV Multiport Adapter is also compatible with iPad Pro. This adapter can output video from iPad Pro at up to 4K resolution and 30Hz.*
iPad Pro can output Dolby Digital Plus audio streams via HDMI, but not Dolby Atmos. Also note that iPad Pro will play HDR10 or Dolby Vision content via HDMI when HDMI 2.0 adapters that support these formats become available.
* When you use the Apple USB-C Digital AV Multiport Adapter with iPad Pro, its Home screen and apps appear on HDMI displays at 1080p and 60Hz. When you begin playing video content, the resolution switches to match the content, up to 4K at 30Hz. Turn on the Match Content option on iPad Pro in Settings > Displays.