A script to make a quick video using a sequence of images. It takes a list of input image files, zooms them in progressively, and combines them to create a zoom-in animation. The resulting animation is saved as a video file specified by the output_file parameter. I have used this script to make this clip.
test3.mp4
- Import necessary modules:
from moviepy.editor import *
This line imports the required functions and classes from the MoviePy library, which is a Python module for video editing and manipulation.
- Define the create_zoom_video function:
def create_zoom_video(images, output_file, zoom_factor=0.05, duration_per_image=1):
This function takes four parameters:
- images: A list of input image file paths.
- output_file: The path where the output video file will be saved.
- zoom_factor: The factor by which the images will be zoomed in each frame.
- duration_per_image: The duration (in seconds) for which each image will be displayed in the final video.
- Create an empty list to store video clips:
clips = []
- Iterate over the input images and create video clips for each image:
for i, image in enumerate(images):
The enumerate function is used here to loop through the list of input images while also keeping track of the index.
- Load the image as a VideoClip:
clip = ImageClip(image)
This line loads each image file as a VideoClip object. A VideoClip is a representation of a video file, and in this case, each image is treated as a single-frame video.
- Set the duration for the video clip:
clip = clip.set_duration(duration_per_image)
The set_duration method is used to set the duration of the video clip. Each image will be displayed for the specified duration_per_image seconds.
- Calculate the zoom values:
zoom_values = [1.0, zoom_factor]
The zoom_values list contains two values: 1.0 (no zoom) and zoom_factor (the factor by which the image will be zoomed in).
- Apply the zoom-in effect using the 'resize' method:
clip = clip.resize(lambda t: zoom_values[0] + len(zoom_values) + t)
In this line, the resize method is used to apply the zoom effect to the video clip. The lambda function takes a time value t and calculates the zoom value based on the current time. The zoom_values[0] represents the initial zoom value (1.0), and zoom_values[1] represents the final zoom value (zoom_factor). The len(zoom_values) is used to determine the number of frames for the zoom animation, and t is used to progress through these frames.
- Append the clip to the list of clips:
clips.append(clip)
The zoomed-in video clip is added to the clips list.
- Concatenate the video clips to create the final animation:
final_clip = concatenate_videoclips(clips, method="compose")
The concatenate_videoclips function is used to concatenate the video clips in the clips list. The method="compose" argument means that the clips will be overlaid on top of each other.
- Write the final animation to a video file:
final_clip.write_videofile(output_file, fps=24, codec="libx264")
Finally, the final_clip is written to a video file with the specified output file path, frame rate (fps), and video codec (codec).
- Define the main function and execute the script if run as the main program:
def main():
# ...
if __name__ == "__main__":
main()
This is a common Python pattern where the main function is defined to handle command-line arguments and then executed when the script is run as the main program.
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