mjpeg

How to parse mjpeg http stream from ip camera?

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import cv2 import urllib import numpy as np stream = urllib.urlopen(‘http://localhost:8080/frame.mjpg’) bytes=”” while True: bytes += stream.read(1024) a = bytes.find(‘\xff\xd8’) b = bytes.find(‘\xff\xd9’) if a != -1 and b != -1: jpg = bytes[a:b+2] bytes = bytes[b+2:] i = cv2.imdecode(np.fromstring(jpg, dtype=np.uint8), cv2.CV_LOAD_IMAGE_COLOR) cv2.imshow(‘i’, i) if cv2.waitKey(1) == 27: exit(0) edit (explanation) I just saw that … Read more

What is the specifications for Motion JPEG?

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There isn’t an official standard. In practice, in its simplest form, an mjpeg is just a concatenation of jpeg files, one after the other in the same file. ffmpeg supports this using the -f mjpeg or -vcodec mjpeg switches. JPEG decoders that decode multiple images should remember and use the same jpeg tables for subsequent … Read more

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