frame time base

例句：

1. 1.The camera's frame rate is 30 frames per second, which is fast enough for a video.
   相机的帧率为每秒30帧，对于视频来说已经很快了。
2. 2. To improve the image quality, we need to adjust the frame time base.
   为了提高图像质量，我们需要调整帧时间基准。
3. 3. The software uses a frame time base of 60 frames per second for smooth playback.
   该软件使用每秒钟60帧的帧时间基准来提供平滑播放。