extract jpegs from raw mjpeg dumps

mjpeg_2_jpeg.py

import os,sys

def main():
    video_path = os.path.expanduser(sys.argv[1])
    out_path = os.path.join(os.path.splitext(video_path)[0]+"_out")
    fh = open(os.path.expanduser(video_path), 'rb')
    payload = fh.read()
    start_marker = chr(0xFF)+chr(0xD8)
    images = payload.split(start_marker)[1:]
    os.mkdir(out_path)

    for index,image in enumerate(images):
        fh = open(os.path.join(out_path,'%07d'%index+'.jpeg'),'wb')
        fh.write(start_marker+image)


if __name__ == '__main__':
    # sys.argv.append('~/Desktop/test.mjpeg')
    main()