GIF slideshow maker

gferreira

a fun little script to build slideshows as animated gifs.

'''
Simplest GIF Slideshow

based on "Simplest CSS Slideshow"
http://snook.ca/archives/html_and_css/simplest-css-slideshow
'''

def fadeImgs(img1, img2, seconds, fps=30):
    frames = int(seconds * fps)
    duration = 1 / fps
    w, h = imageSize(img1)
    for i in range(frames):
        newPage(w, h)
        frameDuration(duration)
        alpha1 = i * 1.0 / (frames - 1)
        alpha2 = 1.0 - alpha1
        image(img1, (0, 0), alpha=alpha2)
        image(img2, (0, 0), alpha=alpha1)

def makeSlideshow(imgs, static, fade, gifPath, resolution):
    w, h = imageSize(imgs[0])
    for i, img in enumerate(imgs):
        newPage(w, h)
        frameDuration(static)
        image(img, (0, 0))
        nextImg = imgs[(i + 1) % len(imgs)]
        fadeImgs(img, nextImg, fade)
    saveImage(gifPath, imageResolution=resolution)

imgs = [
    "https://farm3.static.flickr.com/2610/4148988872_990b6da667.jpg",
    "https://farm3.static.flickr.com/2597/4121218611_040cd7b3f2.jpg",
    "https://farm3.static.flickr.com/2531/4121218751_ac8bf49d5d.jpg",
]

makeSlideshow(imgs, 2, 1, '~/Desktop/slideshow-test.gif', 18)