How to Easily Adjust Video Resolution to 720p Using Python

def convert_video_resolution(input_path, output_path, new_resolution=(1280, 720)):
    """
    Convert the resolution of the video file to the specified new resolution.
    :param input_path: The path of the input video file.
    :param output_path: The path where the output video file will be saved.
    :param new_resolution: A tuple containing the new width and height to set the new resolution of the video, default is 720p (1280x720).
    """
    # Check if the input file exists
    if not os.path.isfile(input_path):
        raise FileNotFoundError(f"Input file {input_path} not found.")
    try:
        # Load the video clip using a context manager to automatically release resources
        with VideoFileClip(input_path) as clip:
            # Resize the video to the new resolution
            resized_clip = clip.resize(new_resolution)
            # Set parameters for writing the video file:
            # codec='libx264' - use H.264 encoding, a widely supported video compression format
            # audio_codec='aac' - use AAC audio encoding, providing good audio quality and compatibility
            # preset='medium' - balance between encoding speed and compression ratio
            # threads=4 - number of parallel processing threads, can be adjusted according to CPU core count
            # bitrate - optional parameter, defines the output video bitrate (e.g., '5000k'), adjust as needed to control file size and quality
            write_params = {
                "codec": "libx264",
                "audio_codec": "aac",
                "preset": "medium",
                "threads": 4,
                # "bitrate": "5000k",  # Uncomment and adjust bitrate as needed
            }
            # Write the new video file
            resized_clip.write_videofile(output_path, **write_params)
    except Exception as e:
        # Capture any errors that occur and print the error message
        print(f"An error occurred while processing the video: {e}")
        raise  # Raise the exception so the caller knows an error occurred

# Video source file path
video_path = './video.mp4'
# Video target file path
output_path = './video720.mp4'
# Call the function to convert video resolution
convert_video_resolution(video_path, output_path)