77 lines
1.6 KiB
Plaintext
77 lines
1.6 KiB
Plaintext
/**
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* Frames
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* by Andres Colubri.
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*
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* Moves through the video one frame at the time by using the
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* arrow keys. It estimates the frame counts using the framerate
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* of the movie file, so it might not be exact in some cases.
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*/
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import processing.video.*;
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Movie mov;
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int newFrame = 0;
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void setup() {
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size(640, 360);
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background(0);
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// Load and set the video to play. Setting the video
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// in play mode is needed so at least one frame is read
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// and we can get duration, size and other information from
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// the video stream.
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mov = new Movie(this, "transit.mov");
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// Pausing the video at the first frame.
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mov.play();
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mov.jump(0);
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mov.pause();
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}
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void movieEvent(Movie m) {
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m.read();
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}
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void draw() {
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background(0);
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image(mov, 0, 0, width, height);
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fill(255);
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text(getFrame() + " / " + (getLength() - 1), 10, 30);
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}
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void keyPressed() {
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if (key == CODED) {
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if (keyCode == LEFT) {
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if (0 < newFrame) newFrame--;
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} else if (keyCode == RIGHT) {
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if (newFrame < getLength() - 1) newFrame++;
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}
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}
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setFrame(newFrame);
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}
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int getFrame() {
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return ceil(mov.time() * 30) - 1;
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}
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void setFrame(int n) {
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mov.play();
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// The duration of a single frame:
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float frameDuration = 1.0 / mov.frameRate;
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// We move to the middle of the frame by adding 0.5:
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float where = (n + 0.5) * frameDuration;
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// Taking into account border effects:
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float diff = mov.duration() - where;
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if (diff < 0) {
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where += diff - 0.25 * frameDuration;
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}
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mov.jump(where);
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mov.pause();
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}
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int getLength() {
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return int(mov.duration() * mov.frameRate);
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} |