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import cv2
def video_label ( video_path , labels , start_frame , end_frame ) :
"""
给指定帧的图像，添加标注信息
video_path:视频输入文件
labels：
start_frame:动作起始帧
end_frame：
"""
cap = cv2 . VideoCapture ( video_path )
while cap . isOpened ( ) :
ret , frame = cap . read ( )
if not ret :
break
frame_idx = cap . get ( cv2 . CAP_PROP_POS_FRAMES )
if start_frame < = frame_idx and frame_idx < = end_frame :
cv2 . putText ( frame , labels , ( 0 , 10 ) , cv2 . FONT_HERSHEY_SIMPLEX , 0.9 , ( 0 , 255 , 0 ) , 2 )
cv2 . namedWindow ( " Detection_results " , cv2 . WINDOW_AUTOSIZE )
cv2 . imshow ( " Detection_results " , frame )
if cv2 . waitKey ( 10 ) & 0xFF == ord ( ' q ' ) :
break
cap . release ( )
cv2 . destroyAllWindows ( )
if __name__ == " __main__ " :
video_path = " D:/download/PaddleVideo1/output/output/after_1/0711-1_0_0.avi "
label = " playing phone! "
start_frame = 100
end_frame = 600
video_label ( video_path , label , start_frame , end_frame )