#coding: utf-8
# ////////////////////////////////////////////////////////////////////////////
# ///【CV2 カメラキャプチャー】                                            ///
# ////////////////////////////////////////////////////////////////////////////
if "__file__" in globals():
    import os, sys
    sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
import cv2

if __name__ == "__main__":
    folder_select   = "16S"
    video_select    = "SD"
    folder_path     = "d:\\VisualStudio2017\\Python3.5_GPU\\test_dataset\\Nogizaka_" + folder_select
    mp_path         = "c:\\Photo\\nogizaka46-" + video_select + ".mp4"

    source_name     = "outvideo.mp4"
    write_name      = "CV2_CASE2_N" + folder_select + "_N46" + video_select + "_stramVideos.mp4"

    face_cascade    = cv2.CascadeClassifier("C:\\opencv-3.4.1\\sources\\data\\haarcascades\\haarcascade_frontalface_alt2.xml")
    cap = cv2.VideoCapture(mp_path)

    fps = int(cap.get(cv2.CAP_PROP_FPS))                        # カメラのFPSを取得
    w = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))                  # カメラの横幅を取得
    h = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))                 # カメラの縦幅を取得
    fourcc = cv2.VideoWriter_fourcc("m", "p", "4", "v")         # 動画保存時のfourcc設定（mp4用）
    outFilename = write_name
    video = cv2.VideoWriter(outFilename, fourcc, fps, (w, h))   # 動画の仕様（ファイル名、fourcc, FPS, サイズ）

    cnt = 0
    while True:
        ret, img = cap.read()
        try:
            gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
            faces = face_cascade.detectMultiScale(gray, scaleFactor=1.3, minNeighbors=5)
            for x, y, w, h in faces:
                cv2.rectangle(img, (x, y), (x + w, y + h), (255, 0, 0), 2)

            cv2.imshow("video image", img)

    cap.release()
    cv2.destroyAllWindows()

(py37) d:\VisualStudio2017\Python3.5_GPU\DeZero\steps>pip install cv2
ERROR: Could not find a version that satisfies the requirement cv2 (from versions: none)
ERROR: No matching distribution found for cv2

pip install opencv-python

(py37) d:\VisualStudio2017\Python3.5_GPU\DeZero\steps>pip install opencv-python
Requirement already satisfied: opencv-python in c:\users\yamin\anaconda3\envs\py37\lib\site-packages (4.6.0.66)
Requirement already satisfied: numpy>=1.14.5 in c:\users\yamin\anaconda3\envs\py37\lib\site-packages (from opencv-python) (1.21.6)

(py37) d:\VisualStudio2017\Python3.5_GPU\DeZero\steps>pip install opencv_python
Requirement already satisfied: opencv_python in c:\users\yamin\anaconda3\envs\py37\lib\site-packages (4.6.0.66)
Requirement already satisfied: numpy>=1.14.5 in c:\users\yamin\anaconda3\envs\py37\lib\site-packages (from opencv_python) (1.21.6)

pip uninstall opencv-python
pip uninstall opencv-contrib-python
pip install opencv-contrib-python