Base example from PyPi is not working as expected in latest version -- with_duration seems to be ignored

[harsh-zymr]

Running the example code vailable on PyPi site for moviepy.

Expected Behavior

The text should stop displaying after 10 seconds.

Actual Behavior

The text is displayed for 14 seconds, regardless of what value is passed in with_duration method.

Steps to Reproduce the Problem

from moviepy import VideoFileClip, TextClip, CompositeVideoClip

# Load file example.mp4 
clip = (
    VideoFileClip("long_examples/example2.mp4")
)

# Generate a text clip. You can customize the font, color, etc.
txt_clip = TextClip(
    font="Arial.ttf",
    text="Hello there!",
    font_size=70,
    color='white'
).with_duration(10).with_position('center')

# Overlay the text clip on the first video clip
final_video = CompositeVideoClip([clip, txt_clip])
final_video.write_videofile("result.mp4")

Specifications

• Python Version: 3.13.0
• MoviePy Version: 2.1.1
• Platform Name: Macbook Pro - M1 2020
• Platform Version: MacOS Sonoma 14.5
• ffmpeg version: 7.1

[harsh-zymr]

Interestingly this only happened when a video, generated by another NodeJS application, was used. The Nodejs generated video using ffmpeg only.
If I generate a video from the same library then the issue does not happen.

[OsaAjani]

Could you include the problematic video please

[OsaAjani]

Hi @harsh-zymr I would need the mentioned video to be able to test, I cannot reproduce.

[harsh-zymr]

@OsaAjani I will need to recreate it now since I dropped nodejs app and moved to full python generation only to avoid the issue. I will share the video here in a day or so, after I recreate it.

[harsh-zymr]

@OsaAjani Here is one of the videos:

vid.mp4

[OsaAjani]

Thanks, I'll put it on my to-do list !