# Encode inputfile.tar.gz as a series of video frames
# Frames are written to frames/frameNNNN.png
from PIL import Image

with open('inputfile.tar.gz', 'rb') as f:
    data = f.read()

WIDTH = 120
HEIGHT = 90
CHUNK_SIZE = int((WIDTH * HEIGHT) / 8)

chunks = []
offset = 0
while offset < len(data):
    chunks.append(data[offset:offset+CHUNK_SIZE])
    offset += CHUNK_SIZE

for frame_num, chunk in enumerate(chunks):
    padded_chunk = chunk + (b'\0' * (CHUNK_SIZE - len(chunk)))
    img = Image.frombytes('1', (WIDTH, HEIGHT), padded_chunk)
    img.save('frames/frame%04d.png' % (frame_num + 1))

# Encode as video with:
# ffmpeg -i frames/frame%04d.png -vf scale=1440:1080 -sws_flags neighbor -vcodec ffv1 output.mkv
# Decode the resulting downloaded video with:
# ffmpeg -i downloaded.mkv -vf scale=120:-1,eq=contrast=10 -sws_flags neighbor -pix_fmt monob -f rawvideo result.tar.gz