to capture live video feed and run only when keyPressed() problem.... please help

Programming Questions

ashleyjam..

to capture live video feed and run only when keyPressed() problem.... please help

in Programming Questions • 3 years ago

Hi i have a nice little capture live video input program which basically upon keyPressed captures the current frame and then displays it to the screen in a specific place.

What i want though is for when the key is pressed to check the current time, then show the live feed and over the time do a countdown timer in text. When countdown is finished stop reading the live stream and just display the last frame as the image(myCapture,xPos,yPos,200,200);

My trouble is that i can only seem to get the feed to be live within the main draw - rather than the keyPressed -

and i cannot get it to run a simple check of if (millis() >= startCounter + 5000)

SO can i run timer based loop recursion within the keyPressed ?

I tried setting a global boolean to if keyPressed= true then start a timer and then run an if check - but it didnt work. it jut didnt loop because it ran through so fast that it didnt stop. When i put the timer check in it just didnt actually check the time. Unless my layering of syntax was incorrect

Anybody got any neat ways to achieve this.

Many Thanks

Replies(2)

blindfish

Re: to capture live video feed and run only when keyPressed() problem.... please help

3 years ago

A global boolean sounds like a good approach... and it should work fine. Post some code and we'll be able to point you in the right direction ;)

ashleyjam..

Re: to capture live video feed and run only when keyPressed() problem.... please help

3 years ago

Thanks here is the whole thing. please excuse some bad code practice in my position location etc;-) and i have lots of comments of code that i was testing that didnt work. its nearly finished and then when it does what i ant ill tidy it up

As you can see a live feed is occuring due to the call in the draw and then when keypressed it basically saves the gridded image plus the individual image to the hdisk (for recall later f flickr or whatever) and it swaps grid position.

I really want that when you press a key, that it begins the live footage and over the top it says 5,4,3,2,1 (going in actually time of seconds) then it stores the frame and stops live footage. so when no key is pressed you just have 16 gridded pictures. at the minute when no key is pressed you obviously have via the draw just the live video feed appearing in the space where the next picture will be saved.

maybe i should have it all within the draw function rather than calling separate voids.....

Plug in your camera and have a look - also youll need just any background image to substitute for OMG-big.

PFont font;
import processing.video.*;
Capture myCapture;
// starts the capture input
int PicNumber;
PImage a; // Declare variable "a" of type PImage
PImage b,c,d,e,f,g,h,i,j,k,l,m,n,o,p; // the 15 other images
String[] ImageID; // so string 0 is a string 1 is b
String LastTaken;
int xPos, yPos;
PImage[] imgs = new PImage[16];
int xWidth = 200;
int secs;
int mins;
int hours;
int startTime;
int EndCounter;
int BeginCounter;
int Day, Month;
int XRES, YRES;
//=-=-=-=-=-=-=-=-=-=SETUP-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
void setup() {
font = loadFont("tweet72.vlw");
textFont(font,72);
// setup screen size
XRES = 2560; //1280
YRES = 2048; // 1024
size(800, 800);
Day = day();
Month = month();
secs=second();
mins=minute();
hours=hour();
println(hours + ":" + mins +" . " + secs);
startTime = millis();
EndCounter =millis();
BeginCounter =millis();
myCapture = new Capture(this, XRES, YRES);
// image position setup and filename number
xPos=0;
yPos=0;
PicNumber=1;
String[] ImageID = new String[16];
// init grids
for (int z=0; z <16; z++){
ImageID[z] = ("OMG_BIG.jpg");
a = loadImage(ImageID[z]); // Load the image into the program
println(ImageID[z] + z);
}
// use pink or the big one
LastTaken = "OMG_BIG.jpg";
InitPics(); // call the init screen
// use this f one big image
// c = loadImage("OMG_Pink.jpg");
// image(c,0,0,800,800);
//bear in mind now that a has been called via the loadImage
}
//---------------------------------------
void Draw1() {
text("BLAH",xPos,yPos,200,200);
}
//-----------------------------------------------------------------------------draw------------------------------------------------------------
void draw() {
// nothing as the drawimage function is taken by the press key
if (myCapture.available() == true) {
myCapture.read();
}//endif
// if (KeySwitch == true) {
// myCapture.read();
// image(myCapture,xPos,yPos,200,200);
// }
// to constantly have the video running in the current frame
//in the draw method this will show the live stream - however it causes
// problems with the saving of the photos cos it shows double squares.
myCapture.read();
image(myCapture,xPos,yPos,200,200);
// if (keyPressed == true) {
// Draw1();
// DrawMe();
// }
}
//--------------------------------------------------------------------------press key to take pic--------------------------------------------------
void keyPressed() {
DrawMe();
// random assignment
float y = random(0,16); //random numnber between 0 and 15
int choice = int(y); // convert it to whole number
println("saving in space :" +choice);
if(choice==0) { // image 1
xPos =0;
yPos=0;
} else
if(choice==1) { // image 2
xPos = 200;
yPos = 0;
} else
if(choice==2) { // image 3
xPos = 400;
yPos = 0;
} else
if(choice==3) { // image 4
xPos = 600;
yPos = 0;
} else
if(choice==4) { // image 5
xPos = 0;
yPos = 200;
} else
if(choice==5) { // image 6
xPos = 200;
yPos = 200;
} else
if(choice==6) { // image 7
xPos = 400;
yPos = 200;
} else
if(choice==7) { // image 8
xPos = 600;
yPos = 200;
} else
if(choice==8) { // image 9
xPos = 0;
yPos = 400;
} else
if(choice==9) { // image 10
xPos = 200;
yPos = 400;
} else
if(choice==10) { // image 11
xPos = 400;
yPos = 400;
} else
if(choice==11) { // image 12
xPos = 600;
yPos = 400;
} else
if(choice==12) { // image 13
xPos = 0;
yPos = 600;
} else
if(choice==13) { // image 14
xPos = 200;
yPos = 600;
} else
if(choice==14) { // image 15
xPos = 400;
yPos = 600;
} else {
xPos = 600;
yPos = 600;
}//endif
}
//---------------------------------store the images to the hard drive-----------------------------------------------------
void DrawMe(){
// capture frame and put it to screen and save grid copy and individual copy
myCapture.read();
image(myCapture,xPos,yPos,200,200);
//displays it in the box
// if true display the camera in the 1st grid
println("capture complete");
String image_path = ("C:/OMG/" + str(day())+ "_" + str(month())+ "_" + str(year()) +"/");
// String image_date = (str(Day) + "_" +str(Month));
// String fullpath = (image_path + image_date);
saveFrame(image_path + "Grid" + PicNumber + ".jpg");
//full grid pic saved
LastTaken = (image_path + "OMG_whoareyou" +PicNumber + ".jpg");
PicNumber++;
//save individual image of captured frame as well
b = createImage(XRES,YRES,RGB);
b.loadPixels();
for (int t = 0; t < b.pixels.length; t++) {
// set the pixels in the image to those from the video frame
b.pixels[t] = myCapture.pixels[t];
}
b.updatePixels();
b.save(LastTaken);
}
//------------------------------------------------------------------beginning---------------------------------------------------------------------------------
void InitPics() {
// Displays the image at its actual size at point (0,0)
image(a, 0, 0, xWidth, xWidth);
image(a, 200, 0, xWidth, xWidth);
image(a, 400, 0, xWidth, xWidth);
image(a, 600, 0, xWidth, xWidth);
image(a, 0, 200, xWidth, xWidth);
image(a, 200, 200, xWidth, xWidth);
image(a, 400, 200, xWidth, xWidth);
image(a, 600, 200, xWidth, xWidth);
image(a, 0, 400, xWidth, xWidth);
image(a, 200, 400, xWidth, xWidth);
image(a, 400, 400, xWidth, xWidth);
image(a, 600, 400, xWidth, xWidth);
image(a, 0, 600, xWidth, xWidth);
image(a, 200, 600, xWidth, xWidth);
image(a, 400, 600, xWidth, xWidth);
image(a, 600, 600, xWidth, xWidth);
}

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