hasFrame
Determine if video frame is available to read
Syntax
Description
Examples
Create VideoReader
Object and Read Video
Create a VideoReader
object for the sample video file xylophone_video.mp4
.
v = VideoReader("xylophone_video.mp4");
Read all the frames from the video, one frame at a time.
while hasFrame(v) frame = readFrame(v); end
Display information about the last frame returned by readFrame
.
whos frame
Name Size Bytes Class Attributes frame 240x320x3 230400 uint8
Clear the VideoReader
object.
clear v
Read and Play Back Movie File
Create a VideoReader
object for the sample video file xylophone_video.mp4
. Then determine the width and height of the video.
xyloObj = VideoReader("xylophone_video.mp4");
vidWidth = xyloObj.Width;
vidHeight = xyloObj.Height;
Create a video structure array.
mov = struct("cdata",zeros(vidHeight,vidWidth,3,"uint8"),colormap=[]);
Read one frame at a time until the end of the video.
k = 1; while hasFrame(xyloObj) mov(k).cdata = readFrame(xyloObj); k = k+1; end
Size a figure based on the width and height of the video, and then play the video one time.
vf = figure(Position=[0 0 xyloObj.Width xyloObj.Height]);
imshow(mov(1).cdata,Border="tight")
movie(vf,mov,1,xyloObj.FrameRate)
Clear the VideoReader
object.
clear xyloObj
Input Arguments
v
— Input VideoReader
object
VideoReader
object
Input VideoReader
object. Use the VideoReader
function to
create a VideoReader
object from your video file.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Version History
Introduced in R2014b
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