using two movie windows

I have an external .avi file (a movie) and an .avi file constructed using writeVideo. I want to play them in two separate windows. I'm using implay but that puts both files into the same movie player which I can only use to play one at a time. Suggestions?

[Douglas Brenner]

Sorry, not helpful. I am supposed to be able to do it with implay.

[Walter Roberson]

implay does not offer the ability to run multiple simultaneous players. If someone is restricting you to implay then you will not be able to solve this problem.

[Walter Roberson]

Douglas posted:

According to the implay documentation "You can open multiple Video Viewers to view different movies simultaneously". How?

[Douglas]

According to the implay documentation, I can. The quote is right out of it. However, I am not restricted to implay. How would you play two movies at the same time?

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/vision/ref/vision.deployablevideoplayer-class.html

http://www.mathworks.com/help/vision/ref/vision.videoplayer-class.html

[Walter Roberson]

See also the videofig File Exchange contribution.

[Walter Roberson]

Just call implay multiple times with different movies. Each call creates a new viewer. For example,

play1 = implay('shuttle.avi'); play2 = implay('rhinos.avi');

and then click the play button on each of the viewers.

Note: implay() does not offer any obvious method to start playing, though it does offer methods to stop playing. There might be a programmable way to start playing; someone would have to dig further into that.

Answer 2

[Douglas]

Implay opened up two movie players as before but each one was displaying the same movie and movie order under File.

vision.VideoFileReader produced an error.

/Users/douglasbrenner/Documents/Rosen/AOSLO_MA_AVIs/media3.avi
Undefined variable "vision" or class "vision.VideoFileReader".

[Walter Roberson]

The message about vision suggests that you do not have the Computer Vision toolbox installed (or licensed.)

For me in R2016a on OS-X, I get two independent windows if I call implay twice. The default position of the two is the same, but when I move one it is clear the two are working on different files, and I can hit the play button on them independently.

You did not mention your operating system or release, so I installed R2013b on MS Windows to check if there was something about older releases or about MS Windows. However, everything worked fine on MS Windows as well.

I still do not recommend implay because it cannot be controlled by code, but it does work on the systems I have tested on.

You could consider modifying the videofig File Exchange contribution for your needs.

[Douglas]

I am running 2014a on a OS X mac. I still have not been successful in getting two different movies to play simultaneously.

[Walter Roberson]

Which OS-X? I just installed R2014a on El Capitan and had no difficulty (after applying the Java patch to get it to run at all.)

I am not sure if I have any PowerPC based system at hand; the earliest OS-X that I am sure that I can install to test with is Maverick.