video playlist error

Core Library Questions

vladue

in Core Library Questions • 1 year ago

Hi,

I found a code for displaying video and it works perfectly fine:

import processing.video.*;
// Step 1. Declare Movie object
Movie movie;
void setup() {
size(610,480);
// Step 2. Initialize Movie object
// Movie file should be in data folder
movie = new Movie(this,"1.mov");
// Step 3. Start movie playing
movie.loop();
}
// Step 4. Read new frames from movie
void movieEvent(Movie movie) {
movie.read();
}
void draw() {
// Step 5. Display movie.
movie.read();
image(movie,0,0);
}

I tried to change it to play 4 videos, but it doesn't work well:

import processing.video.*;
int maxmyMovies = 4; // Total # of movies
int myMoviesIndex = 0; // Initial movie to be displayed is the first
Movie[] myMovies = new Movie[maxmyMovies]; //array of movies
void setup() {
size(610, 480);
// Loading the movies into the array
// Don't forget to put the .mov files in the data folder!
for (int i = 1; i < myMovies.length; i ++ ) {
myMovies[i] = new Movie(this, "1 " + i + ".mov");
myMovies[i].loop();
}
}
void draw() {
image(myMovies[1], 0, 0);
image(myMovies[2], 0, 0);
image(myMovies[3], 0, 0);
image(myMovies[4], 0, 0);
}

Replies(3)

PhiLho

" it doesn't work well"
Explaining what "doesn't work well" can help, avoiding to setup a test sketch with the movies, etc.
Ie. you should indicate what error message you have, if you have any, what unexpected result you have, and so on.

Here, it is quite obvious, but it might not be always the case, so good problem report is crucial.

The main reason why it "doesn't work well" is that you missed the information that array indexes start at 0. So you have to show myMovies[0] to [3].
And display them at different locations, otherwise you will see only the last one.

vladue

Re: video playlist error

1 year ago

Thank you, I fixed it, now it reports:

NullPointerException

The file "0 1.mov" is missing or inaccessible, make sure the URL is valid or that the file has been added to your sketch and is readable.

Exception in thread "Animation Thread" java.lang.NullPointerException

at quicktime.util.QTHandle.<init>(QTHandle.java:287)

at processing.video.Movie.init(Unknown Source)

at processing.video.Movie.<init>(Unknown Source)

at example_16_4.setup(example_16_4.java:35)

at processing.core.PApplet.handleDraw(Unknown Source)

at processing.core.PApplet.run(Unknown Source)

at java.lang.Thread.run(Thread.java:662)

Of course, all video files are in data folder with processing file.

benja

Re: video playlist error

1 year ago

The error indicates, that there is no file with that name.
f you really have a movie named "1 0.mov" it could maybe help to change the name, because spaces are sometimes causing problems.

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