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Last active November 7, 2018 07:59
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【opencv】
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opencvNotes.md

opencv 中函数的用法例子**

@Roger8
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Roger8 commented Oct 23, 2018 •
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读视频 获取视频参数：帧数, 宽/高，fps

cap = cv2.VideoCapture('MOT16-07.mp4')
# 帧数
cap.get(cv2.CAP_PROP_FRAME_COUNT)
# fps
cap.get(cv2.CAP_PROP_FPS)
#  以帧为单位的当前位置
cap.get(cv2.CAP_PROP_POS_FRAMES)
# 跳到指定帧
# jump to specific frame
framestart = 150
cap.set(cv2.CAP_PROP_POS_FRAMES, int(framestart))
ret ,frm= cap.read()
# 宽/高
cap.get(cv2.CAP_PROP_FRAME_HEIGHT)
cap.get(cv2.CAP_PROP_FRAME_WIDTH)
# 编码方式
codec = int(cap.get(cv2.CAP_PROP_FOURCC)) # 828601953
chr(codec&0xFF) + chr((codec>>8)&0xFF) + chr((codec>>16)&0xFF) + chr((codec>>24)&0xFF) # 转换为字符 avc1

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