Error using YouTube address in detect.py

[makino-hashimoto-books]

Search before asking

• I have searched the YOLOv5 issues and found no similar bug report.

YOLOv5 Component

Detection

Bug

If source is set to YouTube address in detect.py, following error is shown.

Error message:
Traceback (most recent call last):
File "detect.py", line 252, in
main(opt)
File "detect.py", line 247, in main
run(**vars(opt))
File "/usr/local/lib/python3.7/dist-packages/torch/autograd/grad_mode.py", line 28, in decorate_context
return func(*args, **kwargs)
File "detect.py", line 100, in run
dataset = LoadStreams(source, img_size=imgsz, stride=stride, auto=pt)
File "/content/yolov5/utils/datasets.py", line 325, in init
assert cap.isOpened(), f'{st}Failed to open {s}'

Solve:
utils/dataset.py

if urlparse(s).hostname in ('youtube.com', 'youtu.be'): # if source is YouTube video
->
if urlparse(s).hostname in ('www.youtube.com', 'youtu.be'): # if source is YouTube video

Environment

• google colab.

!python detect.py --weights yolov5s.pt --source https://www.youtube.com/watch?v=xxxxxxxx

No response

Additional

No response

Are you willing to submit a PR?

• Yes I'd like to help by submitting a PR!

[github-actions]

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[glenn-jocher]

@makino-hashimoto-books YouTube inference works correctly for me in Google Colab.

We've created a few short guidelines below to help users provide what we need in order to start investigating a possible problem.

How to create a Minimal, Reproducible Example

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If you believe your problem meets all the above criteria, please close this issue and raise a new one using the 🐛 Bug Report template with a minimum reproducible example to help us better understand and diagnose your problem.

Thank you! 😃

[glenn-jocher]

@makino-hashimoto-books nevermind, you are correct, there is an error with the URL you supplied. Your fix looks good. I will implement a PR.

[makino-hashimoto-books]

Thank you for solving method.

In the previous version, "www.youtube.com" was permitted.
Recently, the source file is changed, "www.youtube.com" is not permitted.

Previous version,
if 'youtube.com/' in s or 'youtu.be/' in s: # if source is YouTube video

Latest version
if urlparse(s).hostname in ('youtube.com', 'youtu.be'): # if source is YouTube video

[glenn-jocher]

@makino-hashimoto-books good news 😃! Your original issue may now be fixed ✅ in PR #7242. This PR adds www.youtube.com to the valid hostname list alongside the existing youtube.com and youtu.be. This would allow you to pass youtube.com URLs with or without the www, but you always need the https://, i.e. https://www.youtube.com or https://youtube.com or https://youtu.be are all valid now :)

To receive this update:

• Git – git pull from within your yolov5/ directory or git clone https://github.com/ultralytics/yolov5 again
• PyTorch Hub – Force-reload model = torch.hub.load('ultralytics/yolov5', 'yolov5s', force_reload=True)
• Notebooks – View updated notebooks
• Docker – sudo docker pull ultralytics/yolov5:latest to update your image

Thank you for spotting this issue and informing us of the problem. Please let us know if this update resolves the issue for you, and feel free to inform us of any other issues you discover or feature requests that come to mind. Happy trainings with YOLOv5 🚀!