[英]How to play any video with a fixed frame rate (fps) using OpenCV?
Is there any way or function in OpenCV that allows us to play any video with a fixed frame rate(fps)? OpenCV中是否有任何方式或功能允许我们以固定帧速率(fps)播放任何视频? Different videos may have different frame rates but by using OpenCV library can we play them by a fixed frame rate that we define?
不同的视频可能有不同的帧速率,但通过使用OpenCV库我们可以按照我们定义的固定帧速率播放它们吗?
Thanks in advance. 提前致谢。
Take a look at this article . 看看这篇文章 。 It shows how to play back AVI files with OpenCV.
它显示了如何使用OpenCV播放AVI文件。 Here, the frame rate is read using
这里,使用读取帧速率
int fps = ( int ) cvGetCaptureProperty( capture, CV_CAP_PROP_FPS );
and the delay is set via 延迟是通过设置的
key = cvWaitKey( 1000 / fps );
Hence, by controlling the fps
variable, you can get the play back rate you want. 因此,通过控制
fps
变量,您可以获得所需的回放率。
int fps = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);
int delay = 1000 / fps;
while (true) {
clock_t startTime = clock();
capture.read(frame);
process();
imshow("video", frame);
while (clock() - startTime < delay) {
waitKey(1);
}
}
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