Error in opening movie files

[juanfadev]

Error when trying to open a movie. Just tried with the example 'OpticalFlow' and it is imposible.

Failing in row: opencv.loadImage(video);

Width (0) and height (0) cannot be <=0

[f41ardu]

This may solve your issue.

 while (video.height == 0 )  delay(10); // <-- add  
 opencv.loadImage(video);

or

 if (video.width > 0 && video.height > 0) {//check if the cam instance has loaded pixels
    opencv.loadImage(video);
  } 

I have no idea why this is necessary.
Solved it for my using Processing 3.3.6.

[sean369see]

This above two modifications also work for Processing 3.3.7.