有人对UVC协议有过研究么?
在看协议中,有些不是很明白,在payload中有Frame和stream playload,解释是这样的:
A Stream Based payload format is any format where the video data is transferred as a Byte- or Packet-oriented stream
- Payload Header
- Payload Data
A Frame Based payload format is any format where the video data is transferred as a sequence of individual video images
(or frames), where each frame shares properties such as aspect ratio, bit depth, dimensions, etc
- USB Video Class payload header
- List of format descriptors
这个pay load是指传输的数据么?
从解释看 Stream Based payload 好像是camera 进来的视频流,而frame based是控制信息??
如果是这样的话,那frame中的header信息和stream header的信息不是重复了么?
谢谢!