capturing rtsp camera using OpenCV python

Question

I have a remote camera streaming through rtsp protocol and am trying to access it in OpenCV 2.13.1 using python with following code.

camera = cv2.VideoCapture("rtsp://admin:<port>@<ip>/xyz/video.smp")

However, when I do that I get the following warning

WARNING: Couldn't read movie file rtsp://admin:<port>@<ip>/xyz/video.smp

I have also tried doing this:

camera = cv2.VideoCapture.open("rtsp://admin:<port>@<ip>/xyz/video.smp")

but when I do this I get this error:

`AttributeError: 'builtin_function_or_method' object has no attribute` 'open'

I did searched quite a bit about this problem but couldn't get the idea that works for me. Any help would be appreciated.

example with rtsp streams which works for me on Python 2. Try this streams - maybe it is problem with some codecs. — furas
– furas, Commented Nov 29, 2016 at 21:20
No unfortunately it didnt worked for me although I am also using python 2 — Nik391
– Nik391, Commented Nov 29, 2016 at 21:31
so maybe you have problem with some codecs or something else. I have problem with cv2 in Python 3 - it doesn't read stream event from camera :/ I will try to install it from source code maybe it changes something. pyimagesearch.com/tag/install — furas
– furas, Commented Nov 30, 2016 at 12:58

SiHa · Accepted Answer · 2017-06-27 11:25:53Z

23

Credit from RTSP stream and OpenCV (Python):

vcap = cv.VideoCapture("rtsp://192.168.1.2:8080/out.h264")
while(1):
    ret, frame = vcap.read()
    cv.imshow('VIDEO', frame)
    cv.waitKey(1)

edited Jun 27, 2017 at 11:25

SiHa

8,49713 gold badges39 silver badges48 bronze badges

answered Mar 13, 2017 at 21:36

Ryan

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4 Comments

ierdna Over a year ago

is there a library that can view these frames in a browser? (e.g. send it using websocket to the client, then decode it using some JS library?)

Ryan Over a year ago

There is a [jsmpeg] (github.com/phoboslab/jsmpeg) to view the live stream on the browser. But first, you need ffmpeg to send the stream to the relay server.

kappa Over a year ago

for streaming you can easiliy build an mjpeg and stream to browser (blog.miguelgrinberg.com/post/video-streaming-with-flask)

Ollie Graham Over a year ago

@ierdna you could also look at using ImageZMQ along with the StreamingResponse API from Starlette.io

Plinio Bueno Andrade Silva · Accepted Answer · 2021-06-10 17:32:45Z

I had the same problem. My python scrip reading rtsp stream worked only some times and in some computers and I don't figured out why. My solution was initializing the stream from the camera and create a new http stream with VLC. Then, my opencv script reads from "http://127.0.0.1" that is the stream created by the VLC. It's not the best solutoin, but worked out for me.

I made a script inside a .bat file to keep simple to initialize the VLC with the correct configurations. The comando line to do it is:

"C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" rtsp://10.0.0.1 input_stream --ipv4-timeout=600000 --sout #transcode{vcodec=h264,acodec=mpga,ab=128,channels=2,samplerate=44100,scodec=none}:http{mux=ffmpeg{mux=flv},dst=:8080/} :no-sout-all :sout-keep

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