satvid.py

import cv2
import os, sys

# Each video has a frame per second which is number of frames in every second
frame_per_second = 60 # smooth as shit bo
image_folder = sys.argv[1]
tempvid = 'output.mp4'
video_output = sys.argv[2]

# go back and change this to accept any sat as an arg
files_and_duration = [(os.path.join(image_folder, img), 1) for img in sorted(os.listdir(image_folder)) if img.endswith(".png")]


w, h = None, None
for file, duration in files_and_duration:
    print(f'writing {file} to the video')
    frame = cv2.imread(file)

    if w is None:
        # Setting up the video writer
        h, w, _ = frame.shape
        fourcc = cv2.VideoWriter_fourcc('m', 'p', '4', 'v')
        writer = cv2.VideoWriter(tempvid, fourcc, frame_per_second, (w, h))

    # Repating the frame to fill the duration
    # fps cannot be a float, that's why you run the ffmpeg command afte, massively reduces file size
    for repeat in range(duration * frame_per_second):
        writer.write(frame)

writer.release()

os.system(f'ffmpeg -y -i {tempvid} -vf  "setpts=0.10*PTS" {video_output}')
#ffmpeg -y -i output.mp4 -vf  "setpts=0.20*PTS" meteosat-9.mp4

print(f'video written: {video_output}')