From e2cf07facccca0813c453b640c61d9ad0736c94b Mon Sep 17 00:00:00 2001 From: Glenn Jocher Date: Tue, 14 Jun 2022 14:28:21 +0200 Subject: [PATCH] Reject webcam inference on Colab/Kaggle (#8209) * Reject webcam inference on Colab/Kaggle Improve user error understanding for https://github.com/ultralytics/yolov5/issues/8180 * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * cleanup Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> --- utils/dataloaders.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/utils/dataloaders.py b/utils/dataloaders.py index 4690f0c2e81e..8f32c301b772 100755 --- a/utils/dataloaders.py +++ b/utils/dataloaders.py @@ -28,7 +28,7 @@ from utils.augmentations import Albumentations, augment_hsv, copy_paste, letterbox, mixup, random_perspective from utils.general import (DATASETS_DIR, LOGGER, NUM_THREADS, check_dataset, check_requirements, check_yaml, clean_str, - cv2, segments2boxes, xyn2xy, xywh2xyxy, xywhn2xyxy, xyxy2xywhn) + cv2, is_colab, is_kaggle, segments2boxes, xyn2xy, xywh2xyxy, xywhn2xyxy, xyxy2xywhn) from utils.torch_utils import torch_distributed_zero_first # Parameters @@ -321,6 +321,9 @@ def __init__(self, sources='streams.txt', img_size=640, stride=32, auto=True): import pafy s = pafy.new(s).getbest(preftype="mp4").url # YouTube URL s = eval(s) if s.isnumeric() else s # i.e. s = '0' local webcam + if s == 0: + assert not is_colab(), '--source 0 webcam unsupported on Colab. Rerun command in a local environment.' + assert not is_kaggle(), '--source 0 webcam unsupported on Kaggle. Rerun command in a local environment.' cap = cv2.VideoCapture(s) assert cap.isOpened(), f'{st}Failed to open {s}' w = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))