Put a text on a video (python + ffmpeg)

This script let’s you put a text on a video. It uses ffmpeg, a free tool to manipulate video. First go to ffmpeg.org and install it, then use this code. You can put the text in the middle with a black box with an opacity of 0.5, or you can put it where you want. You pass the text as argument when you call the text() function.

import os

def text(text, x="center"):
    if x == "center":
        w = "(w-text_w)/2"
        h = "(h-text_h)/2"
    elif x == "left":
        w = "10"
        h = "h - 30"
    else:
        w = "0"
        y = "0"
    os.system(f"""ffmpeg -i merola.mp4 -vf drawtext="fontfile=/path/to/font.ttf: \
    text={text}: fontcolor=white: fontsize=24: box=1: [email protected]: \
    boxborderw=5: x={w}: y={h}" -codec:a copy output.mp4""")

def text_bottom_left():
    os.system("""ffmpeg -i merola.mp4 -vf drawtext="fontfile=/path/to/font.ttf: \
    text={text}: fontcolor=white: fontsize=24: box=1: [email protected]: \
    boxborderw=5: x=0: y=h-30" -codec:a copy output.mp4""")

text("Python's great")