Output canvas to video or sequence of png's

[ReneTC]

Not sure if it's possible, but I can't find anything online or in the documentation:
I think a useful feature would be to output the canvas to either video or a sequence of png's (maybe with alpha channel).

[jeremydouglass]

I believe that saveFrame() isn't implemented yet -- that it was prototyped in #31 #33 but never reimplemented in vispy.

[arihantparsoya]

@ReneTC I have implemented save_frames, does this resolve the issue?

1885fda

[ReneTC]

Thank you very much! Do you mind given an example how to use it? I'm new to this package. I tried saving this from the example page:

from p5 import *

x = 0
y = 0
dim = 80.0

def setup():
        size(640, 360)
        no_stroke()

def draw():
        background(102)

        global x
        x = x + 0.8

        if x > width + dim:
                x = -dim

        translate(x, height/2 - dim/2)
        fill(255)
        rect((-dim/2, -dim/2), dim, dim)

        # Transforms accumulate. Notice how this rect moves
        # twice as fast as the other, but it has the same
        # parameter for the x-axis value
        translate(x, dim)
        fill(0)
        rect((-dim/2, -dim/2), dim, dim)

if __name__ == '__main__':
  run()

[arihantparsoya]

Use this code:

from p5 import *

x = 0
y = 0
dim = 80.0

def setup():
    size(640, 360)
    no_stroke()

def draw():
    background(102)

    global x
    x = x + 0.8

    if x > width + dim:
            x = -dim

    translate(x, height/2 - dim/2)
    fill(255)
    rect((-dim/2, -dim/2), dim, dim)

    # Transforms accumulate. Notice how this rect moves
    # twice as fast as the other, but it has the same
    # parameter for the x-axis value
    translate(x, dim)
    fill(0)
    rect((-dim/2, -dim/2), dim, dim)

def mouse_pressed():
	save_frame("export.png")

if __name__ == '__main__':
  run()

when the mouse is pressed, the save_frame() function exports a png file. If you want to save a image file for every frame, put the save_frame function inside draw()

[ReneTC]

Thank you for taking the time to help me out. I really appreicate that. Perfect!

[jeremydouglass]

@ReneTC -- great -- can this be closed, then?

[ReneTC]

sorry, yes @jeremydouglass