a glitchy video

process_images.py

'''

    How to download and cut up the video (requires python3 and ffmpeg)

      virtualenv-3.4 anenv
      . ./anenv/bin/activate
      pip3.4 install you-get
      you-get https://vimeo.com/45878034
      ffmpeg -i View\ from\ the\ ISS\ at\ Night\ from\ Knate\ Myers\ on\ Vimeo.mp4 -ss 00:02:36 -t 00:00:10 -c copy source-video.mp4


    Now we cut it up into separate images:
        mkdir video-images
        ffmpeg -i source-video.mp4 -f image2 video-images/image-%3d.jpg


    We can change the images, and then join them into a video:
        ffmpeg -framerate 29.97 -i output-images/image-%3d.jpg -c:v libx264 -r 29.97 -pix_fmt yuv420p our-glitchy-video.mp4


    Let's join all our work together:
        ffmpeg -i "concat:our-glitchy-video.mp4|our-glitchy-video2.mp4|our-glitchy-video3.mp4" -c:v libx264 -pix_fmt yuv420p our-video-joined-together.mp4



    To update our video as we change the code:
        python process_images.py video-images output-images;rm our-glitchy-video.mp4;ffmpeg -framerate 29.97 -i output-images/image-%3d.jpg -c:v libx264 -r 29.97 -pix_fmt yuv420p our-glitchy-video.mp4;open our-glitchy-video.mp4

'''

import os, sys, glob, random

os.environ["SDL_VIDEODRIVER"] = "dummy" 

import pygame
if 1:
    #some platforms might need to init the display for some parts of pygame.
    import pygame.display
    pygame.display.init()
    screen = pygame.display.set_mode((1,1))
    pygame.font.init()


txt = "Pygame"
font = pygame.font.Font(None, 60)
pygame_surf = font.render(txt, 1, (127,127,0))

input_dir, output_dir = sys.argv[1], sys.argv[2]


images = glob.glob(os.path.join(input_dir, 'image-*.jpg'))
print list(sorted(images))

if not images:
    raise ValueError("no images in input_dir")

if not os.path.exists(output_dir):
    os.mkdir(output_dir)

for i, image_path in enumerate(images):
    surf = pygame.image.load(image_path)
    # if not (i % (int(random.random() * 5) + 1)):
    if random.random() > 0.3:
        surf = pygame.transform.laplacian(surf)

    if i > 50:
        surf.blit(pygame_surf, surf.get_rect().center)

    new_path = image_path.replace(input_dir, output_dir)
    pygame.image.save(surf, new_path.replace(".png", ".jpg"))