I found a few posts in older forums but I can’t find a definitive answer.
I have multiple videos in a collage. I want to save the frame of the whole composition to render it in a sequence of PNGs. The thing is: I can’t play frame by frame all the videos and using the code bellow they stop when reaching the end (despite the use of loop and other operation). Any ideas?
Despite I even put a delay after the saveFrame and that I’m using the speed(0) method I still have videos that run too fast in the rendered images (as they jump or lost frames). This is driving me crazy.
For the code bellow you just need a ‘data’ folder with a bunch of mp4 videos. It should work.
Thanks so much for any help!
import processing.video.*;
//File path;
String[] files;
StringList f;
int numfiles=0;
int timer = -5000;
int tcontrol= 2000;
int numVideos=8;
int idx=0;
String scrtxt;
int recording=0;
VideoM[] v = new VideoM[numVideos];
Movie[] vv;
void setup(){
size(1400, 1400, P2D);
frameRate(25);
files = loadfiles();
// dirty array randomization
f = new StringList();
for(int i = 0;i < files.length;i++){
f.append(files[i]);
}
f.shuffle();
for(int i = 0;i < f.size()-1;i++){
files[i]=f.get(i);
}
//-------------------------
numfiles = files.length;
if (numfiles>9) { numfiles=9; }
loadvideos();
for(int i = 0;i < numVideos;i++){
v[i] = new VideoM();
}
}
void draw() {
background(0);
for(int i = 0; i <numVideos; i++){
v[i].display();
}
if ((millis() - timer) > tcontrol) {
timer = millis();
tcontrol= int(random(4,6))*500;
}
saveFrame("render/render-######.png");
delay(5);
}
void loadvideos(){
String video;
vv = new Movie[numfiles];
for (int i=0; i<numfiles; i++){
//video= files[int(random(numfiles))];
video= f.get(i);
vv[i] = new Movie(this, video);
vv[i].loop();
vv[i].pause();
println ("Loading ", video);
}
}
class VideoM {
Movie m;
String video;
int x;
int y;
int w;
int h;
int alpha;
int alphai;
int fadeout=0;
float increase = 0;
int movieFPS = 25;
float movieFrameTime = 1.0/movieFPS;
float movieTime;
VideoM() {
genera();
println(numfiles);
m = vv[idx];idx++; if (idx>=numfiles) idx=0;
m.loop();
m.speed(0);
// m.volume(random(0.4,0.6));
// m.speed(random(0.6,1.0));
m.jump(random(m.duration()));
//m.play();
}
void genera(){
x=int(random(50, width/2+width/4));
y=int(random(50, height/2+height/4));
w=int(random(300,720)); //horiz
//w=int(random(200,620));
h=int(w/1.88);
alpha=int(random(100,255));
alphai=0;
}
void display(){
tint(255, alphai);
if (fadeout==0) {
alphai++; if (alphai>alpha) { alphai=alpha; }
// else {this.w++; this.h=int(this.w/1.88);}
} else { alphai--;
// this.w++; this.h=int(this.w/1.88);
if (alphai<0) {alphai=0;fadeout=0;this.newvid();}
}
movieTime = (increase * movieFrameTime) % m.duration();
if (movieTime>m.duration()) movieTime=0;
m.jump(movieTime);
m.read();
if(m != null) image(m, x, y, w, h);
increase++;
}
void cambiavid(){
fadeout=1;
}
void newvid() {
// m.pause();
m=null;
int j=int(random(numfiles));
println("cambio: ", j);
m = vv[j];
m.loop();
genera();
m.jump(random(m.duration()));
// println(Thread.currentThread());
}
}
void newset(){
for(int i = 0;i < numVideos;i++){
println(i);
v[i].newvid();
}
}
void newvideo(){
int i = int(random(numVideos));
v[i].cambiavid();
}
void movieEvent(Movie m) {
m.read();
}
boolean bStop,bColor=true;
boolean bSave=false,bVidO=false;
void keyPressed()
{
// carga nuevo video
if (key == 'v' || key == 'V') {
background(0); loadvideos();
}
if (key == 'n' || key == 'N') {
newset();
}
}
///////
String[] loadfiles(){
// The data path of the folder to look in (write your own)
java.io.File folder = new java.io.File(dataPath("")
);
// let's set a filter (which returns true if file's extension is .mp4)
java.io.FilenameFilter pngFilter = new java.io.FilenameFilter() {
public boolean accept(File dir, String name) {
return name.toLowerCase().endsWith(".mp4");
}
};
// list the files in the data folder, passing the filter as parameter
String[] filenames = folder.list(pngFilter);
return(filenames);
}
