rkmpp and OSD

To develop a streaming and OSD (On-Screen Display) system, you will need to follow these steps: 1. Choose a hardware platform: You need to select a hardware platform that is capable of streaming and OSD. You can choose from a range of platforms such as Raspberry Pi, Nvidia Jetson, or any other platform that meets your requirements. 2. Select a streaming protocol: You need to select a streaming protocol that suits your needs. There are several protocols available such as HLS, RTSP, RTMP, etc. Choose the one that best suits your requirements. 3. Develop a streaming application: Once you have selected a hardware platform and a streaming protocol, you need to develop a streaming application. This application should be able to capture video from a camera or a source and stream it using the selected protocol. 4. Develop an OSD application: You also need to develop an OSD application that will overlay graphics and text on the streaming video. This application should be able to receive data from external sources such as sensors or GPS and overlay the data on the video. 5. Integrate streaming and OSD: Once you have developed both the streaming and OSD applications, you need to integrate them. This can be done by using APIs or libraries provided by the platform or the streaming protocol. 6. Test and deploy: Finally, you need to test the system thoroughly and deploy it. You should ensure that the system is stable, performs well, and meets the requirements of your use case. Overall, developing a streaming and OSD system requires expertise in hardware, software, and integration. It is a complex task that requires careful planning, implementation, and testing.

Android OSD（On-Screen Display）是一种在视频播放过程中显示信息的技术，可以在视频播放时在屏幕上显示一些信息，如视频的时间、分辨率、码率、音量等信息，同时还可以显示一些控制按钮，如播放、暂停、快进、快退等。Android OSD的主要目的是为了提供更好的用户体验，让用户可以更方便地控制和了解正在播放的视频。在Android系统中，OSD层位于显示层次结构的最上层，负责显示视频相关的信息和控制按钮。在Android应用程序中，开发人员可以通过调用相应的API来实现OSD功能，并在视频播放时显示所需的信息和控制按钮。