How to skip the no of frames in a video

6 次查看（过去 30 天）
MJ Thangaraj
MJ Thangaraj 2016-3-4
评论： Walter Roberson 2019-1-23
Suppose i want to read only one of every 10 frames of a Video
  2 个评论
James Ang
James Ang 2019-1-23
hi, does the answer really tell how to read every 10th frame of the video? as in frame 10,20,30,40...etc
Walter Roberson
Walter Roberson 2019-1-23
You can loop passing in one frame index at a time to the read() method. Or you can fetch the estimate of the number of frames and calculate 10:10:NumbeOfFrames as the index for the read() method. Watch out for the fact that the number of frames is only an estimate.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

B.k Sumedha
B.k Sumedha 2016-3-4
Use read option to read only particular frames.Remaining files will be discarded automatically.
v = VideoReader('xylophone.mp4');
%Read only the first video frame.
video = read(v,1);
%Read only the last video frame.
video = read(v,Inf);
%Read frames 5 through 10.
video = read(v,[5 10]);
%Read from the 50th frame to the end of the video file.
video = read(v,[50 Inf]);
  1 个评论
Walter Roberson
Walter Roberson 2016-3-4
Using read() is no longer recommended for reading frames from VideoReader objects. The recommendation now is to use readFrame(), which can read one frame at a time. You can loop discarding frames if you want. See http://www.mathworks.com/help/matlab/import_export/read-video-files.html

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Audio and Video Data 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by