From 51213e31753db9f3e06d9b0d8be78e0c7d784e52 Mon Sep 17 00:00:00 2001 From: Glenn Jocher Date: Tue, 14 Jun 2022 14:21:59 +0200 Subject: [PATCH] Reject webcam inference on Colab/Kaggle Improve user error understanding for https://github.com/ultralytics/yolov5/issues/8180 --- utils/dataloaders.py | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/utils/dataloaders.py b/utils/dataloaders.py index 4690f0c2e81e..b65f66e3bec4 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 @@ -83,7 +83,7 @@ def exif_transpose(image): 5: Image.TRANSPOSE, 6: Image.ROTATE_270, 7: Image.TRANSVERSE, - 8: Image.ROTATE_90,}.get(orientation) + 8: Image.ROTATE_90, }.get(orientation) if method is not None: image = image.transpose(method) del exif[0x0112] @@ -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 inference is not supported on Colab notebooks' + assert not is_kaggle(), '--source 0 webcam inference is not supported on Kaggle notebooks' cap = cv2.VideoCapture(s) assert cap.isOpened(), f'{st}Failed to open {s}' w = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))