ocvu.video module

Video object

class ocvu.video.Frame(number, image=None)

Bases: object

image

number

class ocvu.video.Video(filepath, grayscale=False)

Bases: object

OpenCV Video.

fourcc

4-character code of codec.

fps

Frames per second.

frame_number

Number of the frame that will be read next.

frames

Returns an iterator with all frames.

generate_background_model(step=None, end=None, mse_min=50)

Generates a background model using the median.

Only sufficiently different frames are considered, using the mean squared error method.

Parameters:

• step – Step to iterate through the video. Default is video FPS rate.
• end – Last frame to consider. Default is 2/3 of video length.
• mse_min – The minimum error at wich the frame is selected. The lower the error, the more similar the two images are.

nframes

Returns the total number of frames.

play(begin=None, end=None, step=1, window=None, wait_time=None)

read_frame(number=None, grayscale=False)

Reads the current frame and returns it. You can also ask for a specific frame. Returns a Frame object.

Parameters:

• number (int) – Number of the frame desired. If None, reads the current one.
• grayscale (bool) – Convert the frame read to grayscale.

show_frame(number=None, window=None, resize=False)

Shows frame number in an OpenCV window. Returns the frame read.

size

Returns the size of the video frames: (width, height).