在MATLAB中获取视频帧计数的最快方法是什么？

Question

Paging through a video with 1423 frames (192X1080 resolution) consumed 63 seconds using this code:

vidObj = VideoReader(videoname);
nFrames = 0;
while hasFrame(vidObj)
    readFrame(vidObj);
    nFrames = nFrames + 1;
end

Loading the same video returned a frame count in a mere 4 seconds.

How can the video frame counting be sped-up?

Answer 1

All you have to do is fetch the NumberOfFrames property from the VideoReader object:

vidObj = VideoReader(videoname);
nFrames = vidObj.NumberOfFrames;