play any videos (even livestreams!) on the weird service-point led matrix display in cccb

pixelstrom.py

import struct
import bz2
import numpy as np
from PIL import Image
import socket
import time
import sys
import tqdm
import os
import glob

HOST, PORT = "172.23.42.29", 2342
CMD_LED_DRAW = 18

def resize_image(img, size, blackbg=True):
        tw, th = size
        w, h = img.size
        a, b = w/tw, h/th
        f = 1/max(a, b)
        pos = int((tw-w*f)/2), int((th-h*f)/2)
        buf = Image.new('RGBA', (tw, th))
        buf.paste(img.resize((int(w*f), int(h*f))).convert('RGBA'), pos)
        if blackbg:
                buf2 = Image.new('RGBA', (tw, th), (0, 0, 0, 255))
                return Image.alpha_composite(buf2, buf)
        else:
                return buf

def do_gamma(im, gamma):
        """Fast gamma correction with PIL's image.point() method"""
        invert_gamma = 1.0/gamma
        lut = [pow(x/255., invert_gamma) * 255 for x in range(256)]
        lut = lut*4 # need one set of data for each band for RGBA
        im = im.point(lut)
        return im

def calcframe(img):
    displaysize = (56*8, 8*20)
    frame = np.frombuffer(do_gamma(resize_image(img, displaysize), 0.5).convert('1').tobytes(), dtype='1b')

    return struct.pack('!HHHHH', CMD_LED_DRAW, 0, 0, 0x627a, 0) + bz2.compress(frame)


#sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
#if len(sys.argv[1:]) > 1:
#    frames = []
#    for arg in tqdm.tqdm(sys.argv[1:]):
#        frames.append(calcframe(Image.open(arg)))
#
#    while True:
#        for frame in frames:
#            sock.sendto(frame, (HOST, PORT))
#            time.sleep(0.04)
#else:
#    sock.sendto(calcframe(Image.open(sys.argv[1])), (HOST, PORT))

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

while True:
    for frame in sorted(glob.glob("/tmp/frames/frame*.png"))[:-1]:
        sock.sendto(calcframe(Image.open(frame)), (HOST, PORT))
        os.unlink(frame)
    time.sleep(0.01)

playvideo.zsh

playvideo() {
  killall ffmpeg
  sleep 0.2
  rm -f /tmp/frames/frame*.png
  ffmpeg -re -y -i "${1}" -s 448x160 -an -r 25 '/tmp/frames/frame%05d.png'
}