Image player (hairline sim)

# sound + image + hairline -> video

import cv2
from moviepy.editor import *

audio_file = 'graph_combined_edited.wav'
audio_clip = AudioFileClip(audio_file)
img_orig = cv2.imread('graph.png')
img_orig = cv2.cvtColor(img_orig, cv2.COLOR_BGR2RGB)

img_h, img_w, _ = img_orig.shape

def make_frame(t):
    img = img_orig.copy()

    cur_pos = t / audio_clip.duration
    x = int(cur_pos * img_w)
    img = cv2.line(img, (x, 0), (x, img_h-1), (0, 0, 0), 2)

    return img

video_clip = VideoClip(make_frame, duration=audio_clip.duration)
video_clip.audio = audio_clip
video_clip.write_videofile("graph.mp4", fps=60, audio_codec='libvorbis', audio_bitrate='320k')