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pythonvideopyglet

Python Video Framework

I'm looking for a Python framework that will enable me to play video as well as draw on that video (for labeling purposes).

I've tried Pyglet, but this doesn't seem to work particularly well - when drawing on an existing video, there is flicker (even with double buffering and all of that good stuff), and there doesn't seem to be a way to get the frame index in the video during the per-frame callback (only elapsed time since the last frame).

Solution

  • Try a Python wrapper for OpenCV such as ctypes-opencv. The C API reference is here, and the wrapper is very close (see docstrings for any changes).

    I have used it to draw on video without any flicker, so you should have no problems with that.

    A rough outline of calls you need:

    • Load video with cvCreateFileCapture, load font with cvFont.
    • Grab frame with cvQueryFrame, increment your frame counter.
    • Draw on the frame with cvPutText, cvEllipse, etc etc.
    • Display to user with cvShowImage.