this means that you don't have virtualenv configured for the project, like I wrote a couple of posts upper,
ps. the commands that I wrote earlier need to be executed in the folder you cloned from github.
here's what I did:
downloaded the .zip version of the GitHub repo. expanded that, opened terminal and cd'd to that directory.
ran the following:
pip install virtualenv
brew install python (though i have 2.7 for octoprint, you'd said this requires 3)
allowed that time to install/compile
virtualenv -p python3.7 .env
.env/bin/pip install -r requirements.txt
allowed that to process to completion, then from that same directory attempted to run:
.env/bin/python mjpegsw.py
I only get the error listed, nothing else.
For the record i am on macOS Yosemite 10.10.5 on an Intel Mac Mini Late 2009. Octoprint runs perfectly and the iSight camera works with OBS and Facetime on the system (its an OG FireWire 400 Camera hooked up with a Firewire 800 to 400 adapter)
Everything seems correct, are you running from a remote terminal or on the console ?
Running in terminal on the Mac itself. Octoprint is running at the same time. I've tried it both with OP running and not. I am not using SSH.
Edit: I did go and just for a laugh try launching Xcode. I have it installed but apparently never launched the program. it'd never been a problem before so I will let you know if that manages to change anything as Xcode is now installing extras.
Ok finally we found the solution for @jabackes, on MacOs Yosemite you need to install opencv==4.0.0.21
I will leave it here for reference.
I think you meant Yosemite, but yes, that seems to have done it! Octoprint can access the camera, and works with the OG iSight Firewire camera... I do notice it doesnt like to stay working 100% though, getting a segmentation fault : 11 if I quickly access the snap or cam over and over... might just be me fat-fingering though.
ooops Yosemite, you are right, for segmentation fault you may try to put it in a loop inside a batch file.
Hi @meska,
I have the problem listed previously by @liffg if I use virtualenv -p python .env. If I try virtualenv -p python3.7 .env, I get 'The path python3.7 does not exist'. I've tried different variations, including using the direct path (usr/local/bin/python3.7). None work.
Help?
Thanks
Hello Ron,
did you installed python with homebrew?
Marco
Yes. Homebrew updated and then successfully installed Python 3.7.7
Hi @meska
First of all, thanks for what you have done.
I'm able to run your program and I get a stream from the iSight camera.
But I'm trying to setup your program in order to use a USB webcam instead of the iSight one.
I didn't find how to select the correct webcam.
Can you help me?
Hi,
I got it 
I read your code and I find the argument to use : "-c".
First I try value from 1 to 5 and that didn't work but I didn't connect the webcam 
When that was done (ie connect the cam), that's working fine with the value "1".
Have a good day
Hi @meska. I think I figured out my Python problem. It appears to be loading the virtual environment now, but I'm not getting the camera feed to load in the browser. Any idea what might be wrong?
Here's the output when running the startup commands:
iMac:Downloads rkz$ cd mjpeg_stream_webcam-master
iMac:mjpeg_stream_webcam-master rkz$ virtualenv -p python3.7 .env
Running virtualenv with interpreter /usr/local/bin/python3.7
Already using interpreter /usr/local/opt/python/bin/python3.7
Using base prefix '/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7'
New python executable in /Users/rkz/Downloads/mjpeg_stream_webcam-master/.env/bin/python3.7
Not overwriting existing python script /Users/rkz/Downloads/mjpeg_stream_webcam-master/.env/bin/python (you must use /Users/rkz/Downloads/mjpeg_stream_webcam-master/.env/bin/python3.7)
Installing setuptools, pip, wheel...
done.
iMac:mjpeg_stream_webcam-master rkz$ source .env/bin/activate
(.env) iMac:mjpeg_stream_webcam-master rkz$ pip install -r requirements.txt
Requirement already satisfied: opencvutils in ./.env/lib/python3.7/site-packages (from -r requirements.txt (line 1)) (0.9.4)
Requirement already satisfied: opencv-python in ./.env/lib/python3.7/site-packages (from -r requirements.txt (line 2)) (4.2.0.34)
Requirement already satisfied: pillow in ./.env/lib/python3.7/site-packages (from -r requirements.txt (line 3)) (7.1.1)
Requirement already satisfied: fake-rpi in ./.env/lib/python3.7/site-packages (from opencvutils->-r requirements.txt (line 1)) (0.7.0)
Requirement already satisfied: numpy in ./.env/lib/python3.7/site-packages (from opencvutils->-r requirements.txt (line 1)) (1.18.2)
Requirement already satisfied: pyyaml in ./.env/lib/python3.7/site-packages (from opencvutils->-r requirements.txt (line 1)) (5.3.1)
Requirement already satisfied: build-utils in ./.env/lib/python3.7/site-packages (from opencvutils->-r requirements.txt (line 1)) (0.3.2)
Requirement already satisfied: colorama in ./.env/lib/python3.7/site-packages (from build-utils->opencvutils->-r requirements.txt (line 1)) (0.4.3)
Requirement already satisfied: twine in ./.env/lib/python3.7/site-packages (from build-utils->opencvutils->-r requirements.txt (line 1)) (3.1.1)
Requirement already satisfied: nose in ./.env/lib/python3.7/site-packages (from build-utils->opencvutils->-r requirements.txt (line 1)) (1.3.7)
Requirement already satisfied: importlib-metadata; python_version < "3.8" in ./.env/lib/python3.7/site-packages (from twine->build-utils->opencvutils->-r requirements.txt (line 1)) (1.6.0)
Requirement already satisfied: readme-renderer>=21.0 in ./.env/lib/python3.7/site-packages (from twine->build-utils->opencvutils->-r requirements.txt (line 1)) (25.0)
Requirement already satisfied: requests>=2.20 in ./.env/lib/python3.7/site-packages (from twine->build-utils->opencvutils->-r requirements.txt (line 1)) (2.23.0)
Requirement already satisfied: requests-toolbelt!=0.9.0,>=0.8.0 in ./.env/lib/python3.7/site-packages (from twine->build-utils->opencvutils->-r requirements.txt (line 1)) (0.9.1)
Requirement already satisfied: keyring>=15.1 in ./.env/lib/python3.7/site-packages (from twine->build-utils->opencvutils->-r requirements.txt (line 1)) (21.2.0)
Requirement already satisfied: pkginfo>=1.4.2 in ./.env/lib/python3.7/site-packages (from twine->build-utils->opencvutils->-r requirements.txt (line 1)) (1.5.0.1)
Requirement already satisfied: tqdm>=4.14 in ./.env/lib/python3.7/site-packages (from twine->build-utils->opencvutils->-r requirements.txt (line 1)) (4.45.0)
Requirement already satisfied: setuptools>=0.7.0 in ./.env/lib/python3.7/site-packages (from twine->build-utils->opencvutils->-r requirements.txt (line 1)) (46.1.3)
Requirement already satisfied: zipp>=0.5 in ./.env/lib/python3.7/site-packages (from importlib-metadata; python_version < "3.8"->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (3.1.0)
Requirement already satisfied: Pygments>=2.5.1 in ./.env/lib/python3.7/site-packages (from readme-renderer>=21.0->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (2.6.1)
Requirement already satisfied: six in ./.env/lib/python3.7/site-packages (from readme-renderer>=21.0->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (1.14.0)
Requirement already satisfied: docutils>=0.13.1 in ./.env/lib/python3.7/site-packages (from readme-renderer>=21.0->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (0.16)
Requirement already satisfied: bleach>=2.1.0 in ./.env/lib/python3.7/site-packages (from readme-renderer>=21.0->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (3.1.4)
Requirement already satisfied: idna<3,>=2.5 in ./.env/lib/python3.7/site-packages (from requests>=2.20->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (2.9)
Requirement already satisfied: chardet<4,>=3.0.2 in ./.env/lib/python3.7/site-packages (from requests>=2.20->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (3.0.4)
Requirement already satisfied: urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1 in ./.env/lib/python3.7/site-packages (from requests>=2.20->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (1.25.9)
Requirement already satisfied: certifi>=2017.4.17 in ./.env/lib/python3.7/site-packages (from requests>=2.20->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (2020.4.5.1)
Requirement already satisfied: webencodings in ./.env/lib/python3.7/site-packages (from bleach>=2.1.0->readme-renderer>=21.0->twine->build-utils->opencvutils->-r requirements.txt (line 1)) (0.5.1)
(.env) iMac:mjpeg_stream_webcam-master rkz$
Super Super! been messing around with VLC and trying to get this to work on my Mac mini.
I have installed perfectly and it works out of the box. I can see the camera when on my Mac mini.
But... (you knew it was coming)
I cannot view the camera on any other machine on my network. Is there a config file I can edit to change the server address from localhost to the IP address of the machine (internal IP)?
Solved:
Edited mjpegsw.py
parser.add_argument('-i', '--ipaddress', help='listening ip address, default LOCALIP ADDRESS', type=str,
default='LOCALIPADDRESS')
On this point did you find a way to restart the octoprint server and enter a password (or bypass this?)
Meska,
First off, thanks for investing the time to figure out how to put all of pieces together and then writing the python script.
FYI... I am a veteran software engineer and have been using python for around 4 years now professionally.
I using a mid-2011 Mac-mini running macOS 10.13.6
for octoprint:
- I made sure I had all the Xcode and Xcode cli tools installed
- I downloaded & installed python 2.7.18 from python.org
- then using pip from that installation, I installed virtualenv
- created a new python virtual environment
- I cloned the source code from the octoprint repository
- activated the virtualenv
- pip installed pyobjc
- and finally did a pip install . from the root of the repo
- I did discover to connect from the Mac-mini to my Creality CR-6 SE that I had to install the CH341SER_MAC very 1.5 drivers
After that, I can get octoprint up and running just fine, connect to it from remote computers, send print jobs to it, etc. Everything is stable.
Next for mjpeg_stream_webcam
- I downloaded & installed python 3.8.5 from python.org
- then using pip from that installation, I installed virtualenv
- created a new python virtual environment
- cloned your git hub repo
but when I tried to install the requirements from the included requirements.txt file, I got the error that there were no matching distributions found for opencvutil (line 1)
so I took a look at the mjpegsw.py script and did not see any imports (as far as I could tell) for this package. So I manually pip installed the other 2 remaining packages.
with the 3.8.5 virtualenv activated I was able to successfully execute python mjpegsw.py with the default arguments and then view the stream by going to http://localhost:5001/cam.mjpg in safari. So I knew that was working.
I did the configuration in octoprint to set the respective values for the stream and snapshot URLs.
Then realized that I needed to install ffmpeg. So I downloaded the static FFmpeg binaries for macOS 64-bit (version release-4.3.1). installed in to my ~/bin directory verified that it worked, and updated the path setting in octoprint.
So I could see the webcam stream in octoprint and could start a time-lapse capture when doing a print.
However, during the printing, I would occasionally get segmentation fault 11 errors, so I'd restart the program again. After a few of these, I got a kernel panic. So I shut down the computer and thought I'd try again tomorrow. I did and even without printing (just viewing the webcam stream), got another kernel panic.
Any ideas as to what might be causing the segmentation fault 11 errors? or worse the kernel panics? I can upload the kernel panic log files, if it will help. I haven't used CV before, but I have a rudimentary idea of what your doing in the script... and it doesn't look terrible complex. Do you think its something in CV or one of the dependencies that were installed along with it? I wouldn't think its the http.server package or the PIL package...
Any suggestions? I'm willing to help troubleshoot.
Best Regards,
-- Greg
Hello Greg,
segfaults sometimes happens, that's why I included a startup script "start.sh" that relaunch the script on crash. You can try with different ffmpeg or opencv versions to see if changes.
I removed opencvutils from requirements, thank you.
Meska,
Thanks for the reply. I get that the start.sh script is a workaround for the script expectedly quitting (due to whatever), but this wasn't, I don't know, as eloquent as I would have liked, as I suspect that the crashes may be contributing to the Kernel panics I am experiencing when I have the script running.
In any event, let me know if you think of any specific components that I should take a look at to narrow it down a bit.
Thanks again for all the great work, keep it up!
By the way... you should have said: "Segfaults happen"... it would have made a great bumper sticker!
Best Regards,
-- Greg
Just got this setup on an iMac and working with the built in webcam. Is there anyway to configure this to use a DSLR plugged in through a generic usb capture card?
Edit: actually nevermind, I closed and restarted the stream with the DSLR plugged in and it seems to have defaulted to that over the built in webcam.
Thanks!
I have tried all of these steps, as well as using the opencv option. I'm running High Sierra, and I can view my USB camera fine using Mac apps. What can I share to help get some help to make this work? Octoprint works great otherwise. Also, when I run the URL, I get "hello world" but no video.