In this tutorial, I will show you how to extract and save frames from a video file. Prerequisites are Chapter 1 and 2.
Steps:
- Open the Video file or camera using cv2.VideoCapture()
- Read frame by frame
- Save each frame using cv2.imwrite()
- Release the VideoCapture and destroy all windows
Now, Let’s code
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import cv2 # Opens the Video file cap= cv2.VideoCapture('C:/New/Videos/Play.mp4') i=0 while(cap.isOpened()): ret, frame = cap.read() if ret == False: break cv2.imwrite('kang'+str(i)+'.jpg',frame) i+=1 cap.release() cv2.destroyAllWindows() |
If you don’t have any video, no need to worry. Open the camera instead of the file using cv2.VideoCapture(0) and start extracting frames.
Use: We can perform a number of operations on these frames like crop, flip, reverse etc. save them into a list and iterate over them to get cropped/flipped/reversed video. (See How you can make Video from images)
Hope you enjoy reading. If you have any doubt/suggestion please feel free to ask and I will do my best to help or improve myself. Good-bye until next time
Please, add termination condition in case of video file. Otherwise it will continue to extract frames from video infinitely.
Thanks… updated
Use cv2.imshow() as well cuz without it, the code won’t stop executing.
How to execute this code?
use python IDLE or install spyder3 using pip install spyder , Run it from cmd
How do I set the parameter for the number of frames to be extracted? I only want to extract every 50th frame
To extract every 50th frame you can do something like this:
how do i need to cut the video with the specific pattern?
i want to run object detection algorithm on frames and then re-assemble them into video , can you please help me
Can you please elaborate where you are facing the problem, in object detection or bounding box creation, or something else?
with creating a video after making object detection on every frame.
Can you find the solution??? Please share with me.. ThankYou
I guess you need premiere pro for that.
after extracting the frames where it will be stored can u do a codes on that
I would like to capture more than one frame but the program hangs for me after I press “s”. I’m using windows 8.1. Any clues?
Hi Fred, are u running the exact same code Or u have added some if condition to break on pressing s?
thanks
Hey Anyone guide me
how can i Crop A Detected Object On A Video Opencv????
pillow (PIL) crop
can i do it on anaconda
Where have the image files been saved on colab?
hi how can I delay the captions? I mean to take next caption after a certain time period
how i can extract a random clip of 10 seconds from a whole video
Hey i wanna extract the bounding box frame so that i can apply ocr on it, can you help
I want to implement the above program, but at different time slots. For example, in a video of 20 mins I want to take at particular intervals such as at 2 mins, 3:50, 5, 10…etc. How can I modify and implement it ?
hello what exactly is ret in the above code?
How can i extracts unique faces in a video and group them as clusters using opencv?
Hey, my video has 30fps and it last 1 minute 23 seconds i run this code everything gone well but i just wondering why it extracts 2497 images when 30 fps*83sec = 2490 hope somebody solve this riddle. Thanks 😀
can anyone tell me after extract the frames how we cluster that frames i mean that characters in seperate folders