python 将多个图片合成为一个视频

参考python + opencv 将图片保存为视频–2016年更新,
code example 为：

def imgs2video(imgs_dir, save_name):
    fps = 24
    fourcc = cv2.VideoWriter_fourcc(*'MJPG')
    video_writer = cv2.VideoWriter(save_name, fourcc, fps, (1920, 1080))
    # no glob, need number-index increasing
    imgs = glob.glob(os.path.join(imgs_dir, '*.png'))

    for i in range(len(imgs)):
        imgname = os.path.join(imgs_dir, 'core-{:02d}.png'.format(i))
        frame = cv2.imread(imgname)
        video_writer.write(frame)

    video_writer.release()

参考python opencv VideoWriter: OpenCV: Frame size does not match video size,

1. ERROR ：

"mMovieWriter.status: 3. Error: Cannot Save"

是由于已经有了同名文件，无法覆盖，删掉再转换就可以了。

1. Warning:

OpenCV: Frame size does not match video size.

1. warning:

WARNING: -finishWriting should not be called on the main thread.