opencv-python カメラに認識されず
解決したいこと
cv2を使ってカメラを起動させたいのですがカメラが認識されません
発生している問題・エラー
[ 2021-04-05 19:08:45.543343 ] searching any camera...
camera_number 0 None
該当するソースコード
import cv2
import datetime
def check_camera_connection():
"""
Check the connection between any camera and the PC.
"""
print('[', datetime.datetime.now(), ']', 'searching any camera...')
true_camera_is = [] # 空の配列を用意
# カメラ番号を0～9まで変えて、COM_PORTに認識されているカメラを探す
for camera_number in range(0, 10):
cap = cv2.VideoCapture(camera_number)
ret, frame = cap.read()
if ret is True:
true_camera_is.append(camera_number)
print("camera_number", camera_number, "Find!")
else:
print("camera_number", camera_number, "None")
print("接続されているカメラは", len(true_camera_is), "台です。")
if __name__ == "__main__":
check_camera_connection()
### 実行環境
windows7 professional
32ビット
python 3.8.5
alabaster 0.7.12
anaconda-client 1.7.2
anaconda-navigator 1.10.0
anaconda-project 0.8.3
argh 0.26.2
argon2-cffi 20.1.0
asn1crypto 1.4.0
astroid 2.4.2
astropy 4.0.2
async-generator 1.10
atomicwrites 1.4.0
attrs 20.3.0
autopep8 1.5.4
Babel 2.8.1
backcall 0.2.0
backports.functools-lru-cache 1.6.1
backports.shutil-get-terminal-size 1.0.0
backports.tempfile 1.0
backports.weakref 1.0.post1
bcrypt 3.2.0
beautifulsoup4 4.9.3
bitarray 1.6.1
bkcharts 0.2
bleach 3.2.1
bokeh 2.2.3
boto 2.49.0
Bottleneck 1.3.2
brotlipy 0.7.0
certifi 2020.6.20
cffi 1.14.3
chardet 3.0.4
click 7.1.2
cloudpickle 1.6.0
clyent 1.2.2
colorama 0.4.4
comtypes 1.1.7
conda 4.9.2
conda-build 3.20.5
conda-package-handling 1.7.2
conda-verify 3.4.2
contextlib2 0.6.0.post1
cryptography 3.1
cycler 0.10.0
Cython 0.29.21
cytoolz 0.11.0
dask 2.30.0
decorator 4.4.2
defusedxml 0.6.0
diff-match-patch 20200713
distributed 2.30.1
docutils 0.16
entrypoints 0.3
et-xmlfile 1.0.1
fastcache 1.1.0
filelock 3.0.12
flake8 3.8.4
Flask 1.1.2
fsspec 0.8.3
future 0.18.2
gevent 20.9.0
glob2 0.7
greenlet 0.4.17
h5py 2.10.0
HeapDict 1.0.1
html5lib 1.1
idna 2.10
imageio 2.9.0
imagesize 1.2.0
importlib-metadata 2.0.0
iniconfig 1.1.1
intervaltree 3.1.0
ipykernel 5.3.4
ipython 7.19.0
ipython-genutils 0.2.0
ipywidgets 7.5.1
isort 5.6.4
itsdangerous 1.1.0
jdcal 1.4.1
jedi 0.17.1
Jinja2 2.11.2
joblib 0.17.0
json5 0.9.5
jsonschema 3.2.0
jupyter 1.0.0
jupyter-client 6.1.7
jupyter-console 6.2.0
jupyter-core 4.6.3
jupyterlab 2.2.6
jupyterlab-pygments 0.1.2
jupyterlab-server 1.2.0
keyring 21.4.0
kiwisolver 1.3.0
lazy-object-proxy 1.4.3
libarchive-c 2.9
llvmlite 0.34.0
locket 0.2.0
lxml 4.6.1
MarkupSafe 1.1.1
matplotlib 3.3.1
mccabe 0.6.1
menuinst 1.4.16
mistune 0.8.4
mkl-fft 1.2.0
mkl-random 1.1.1
mkl-service 2.3.0
mock 4.0.2
more-itertools 8.6.0
mpmath 1.1.0
msgpack 1.0.0
multipledispatch 0.6.0
navigator-updater 0.2.1
nbclient 0.5.1
nbconvert 6.0.7
nbformat 5.0.8
nest-asyncio 1.4.2
networkx 2.5
nltk 3.5
nose 1.3.7
notebook 6.1.4
numba 0.51.2
numexpr 2.7.1
numpy 1.19.2
numpydoc 1.1.0
olefile 0.46
opencv-python 4.5.1.48
openpyxl 3.0.5
packaging 20.4
pandas 1.1.3
pandocfilters 1.4.3
paramiko 2.7.2
parso 0.7.0
partd 1.1.0
path 15.0.0
pathlib2 2.3.5
pathtools 0.1.2
patsy 0.5.1
pep8 1.7.1
pexpect 4.8.0
pickleshare 0.7.5
Pillow 8.0.1
pip 20.2.4
pkginfo 1.6.1
pluggy 0.13.1
ply 3.11
prometheus-client 0.8.0
prompt-toolkit 3.0.8
psutil 5.7.2
py 1.9.0
pycodestyle 2.6.0
pycosat 0.6.3
pycparser 2.20
pycurl 7.43.0.6
pydocstyle 5.1.1
pyflakes 2.2.0
Pygments 2.7.2
pylint 2.6.0
PyNaCl 1.4.0
pyocr 0.8
pyodbc 4.0.0-unsupported
pyOpenSSL 19.1.0
pyparsing 2.4.7
pyreadline 2.1
pyrsistent 0.17.3
PySocks 1.7.1
pytest 0.0.0
python-dateutil 2.8.1
python-jsonrpc-server 0.4.0
python-language-server 0.35.1
pytz 2020.1
PyWavelets 1.1.1
pywin32 227
pywin32-ctypes 0.2.0
pywinpty 0.5.7
PyYAML 5.3.1
pyzmq 19.0.2
QDarkStyle 2.8.1
QtAwesome 1.0.1
qtconsole 4.7.7
QtPy 1.9.0
regex 2020.10.15
requests 2.24.0
rope 0.18.0
Rtree 0.9.4
ruamel-yaml 0.15.87
scikit-image 0.16.2
scikit-learn 0.23.1
scipy 1.5.2
seaborn 0.11.0
Send2Trash 1.5.0
setuptools 50.3.1.post20201107
simplegeneric 0.8.1
singledispatch 3.4.0.3
sip 4.19.13
six 1.15.0
snowballstemmer 2.0.0
sortedcollections 1.2.1
sortedcontainers 2.2.2
soupsieve 2.0.1
Sphinx 3.2.1
sphinxcontrib-applehelp 1.0.2
sphinxcontrib-devhelp 1.0.2
sphinxcontrib-htmlhelp 1.0.3
sphinxcontrib-jsmath 1.0.1
sphinxcontrib-qthelp 1.0.3
sphinxcontrib-serializinghtml 1.1.4
sphinxcontrib-websupport 1.2.4
spyder 4.1.5
spyder-kernels 1.9.4
SQLAlchemy 1.3.20
statsmodels 0.12.0
sympy 1.6.2
tables 3.6.1
tblib 1.7.0
terminado 0.9.1
testpath 0.4.4
threadpoolctl 2.1.0
toml 0.10.1
toolz 0.11.1
tornado 6.0.4
tqdm 4.50.2
traitlets 5.0.5
typing-extensions 3.7.4.3
ujson 4.0.1
unicodecsv 0.14.1
urllib3 1.25.11
watchdog 0.10.3
wcwidth 0.2.5
webencodings 0.5.1
Werkzeug 1.0.1
wheel 0.35.1
widgetsnbextension 3.5.1
win-inet-pton 1.1.0
win-unicode-console 0.5
wincertstore 0.2
wrapt 1.11.2
xlrd 1.2.0
XlsxWriter 1.3.7
xlwings 0.20.8
xlwt 1.3.0
xmltodict 0.12.0
yapf 0.30.0
zict 2.0.0
zipp 3.4.0
zope.event 4.5.0
zope.interface 5.1.0
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