2016-03-30 Create a video in Python from images
I was looking into making a short video based on images produced with matplotlib or pygame. Here is the results with a simple simulation used once in while in my teachings. Unfortunately, I was not able to directly produce a video I could see through the brower. I needed to convert it with MovieMaker.
And the code...
def make_video(images, outimg=None, fps=5, size=None,
is_color=True, format="XVID"):
"""
Create a video from a list of images.
@param outvid output video
@param images list of images to use in the video
@param fps frame per second
@param size size of each frame
@param is_color color
@param format see http://www.fourcc.org/codecs.php
@return see http://opencv-python-tutroals.readthedocs.org/en/latest/py_tutorials/py_gui/py_video_display/py_video_display.html
The function relies on http://opencv-python-tutroals.readthedocs.org/en/latest/.
By default, the video will have the size of the first image.
It will resize every image to this size before adding them to the video.
"""
from cv2 import VideoWriter, VideoWriter_fourcc, imread, resize
fourcc = VideoWriter_fourcc(*format)
vid = None
for image in images:
if not os.path.exists(image):
raise FileNotFoundError(image)
img = imread(image)
if vid is None:
if size is None:
size = img.shape[1], img.shape[0]
vid = VideoWriter(outvid, fourcc, float(fps), size, is_color)
if size[0] != img.shape[1] and size[1] != img.shape[0]:
img = resize(img, size)
vid.write(img)
vid.release()
return vid
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Xavier Dupré
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