some ffmpeg usage collection.
Adminffmpeg -r 360 -start_number 181 -i 34-1/img%d.png -frames:v 900 -vcodec mpeg4 -b 5000k -y 2.mp4 -start_number 181, means start from 181st frame -frames:v 900, totally 900 frames -r 360, set…
How matplotlib makes simulation of zoom out/in and move camera synchronously when render animation | source code
This article records how to simuate the zoom out/in and moving camera synchronously when using matplotlib to render the animation below code is to assume we are going to zoom…
How matplotlib create a hypotrochoid video, to prove endless sqrt(2) | with source code.
https://www.youtube.com/shorts/oEGJfSm7EKQ This article records how I created a Hypotrochoid video using matplotlib. the video is requiring below a few items. need to explain the two dot postion equation. could refer…
How Manim create a pendulum video with a few lines of code | with source code
https://www.youtube.com/watch?v=b2YN8d6jjRI This article records how I created a Modular Arithmetic Multiplication Animation using manim. the video is requiring below a few items. totally 120 balls are there, totally 5 mins…
How Manim create a Modular Arithmetic Multiplication Animation | with source code | very easy
https://youtube.com/shorts/PN3veBRQD20 This article records how I created a Modular Arithmetic Multiplication Animation using manim. the video is requiring below a few items. totally 150 division are there, and would come…
How manim create a Polyrhythms Visualization ainmation | with source code
https://www.youtube.com/watch?v=XA-gDB1HWuQ This article records how I created a Polyrhythms Visualization ainmation using manim. the video is requiring below a few items. it is pattern 3:4:5:6:7:8:9:10 sound effect is seperated from…
How manim create a bouncing square with increasing speed | with source code
https://youtube.com/shorts/2gy1jIYi-FU This article records how I created a bouncing square video using manim, the video is requiring below a few items. speeding is raised when hit the boundry the sound…
How python speed up like 100x video, increase FPS of video | with souce code
This chapter aims to document how the author accelerates video playback, such as increasing it by 100 times, it seems cv2 is not able to set 1000 FPS, hence I…
How python add text on each frame in video | souce code
This chapter aims to document how the author adds text to each frame of the video # Importing all necessary libraries import cv2 import os def makeVideo(path, video_name): cam =…
How to create a sound with gradient HZ | with source code
import os import time import math import numpy as np from scipy.io.wavfile import write def generate_sound(duration: float, frequency_start: float, frequency_end: float, sample_rate: int = 44100, amplitude: float = 0.3, output_file:…