## 技术点记录

1. linux 下播放音频
   ```bash 
   sudo apt install libasound2-dev alsa-utils
   ```
2. linux 下播放视频
   ```bash
   sudo apt install ffmpeg
   ```
   驱动安装
   ```bash
   libdirectfb-dev
   ```
3. 当前用户加入播放音频与视频的组中
    ```bash
    sudo usermod -aG audio,video $USER
    ```

### 关闭屏幕帧缓冲

```bash
# 关闭帧缓冲设备
echo 1 | sudo tee /sys/class/graphics/fb0/blank
# 重新打开帧缓冲设备
echo 0 | sudo tee /sys/class/graphics/fb0/blank
```

### 播放视频
```bash
ffplay -autoexit -fs -i video.mp4
```