Python moviepy subtitle script with extended duration

Skill ECNU-ICALK/AutoSkill/SkillBank/ConvSkill/english_gpt4_8_GLM4.7/python-moviepy-subtitle-script-with-extended-duration

Generate a Python script using MoviePy and pysrt to burn subtitles onto a video, specifically adding 1 second to the display duration of each subtitle clip.From its SKILL.md

Install

npx -y skills add ECNU-ICALK/AutoSkill --skill python-moviepy-subtitle-script-with-extended-duration

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Python MoviePy Subtitle Script with Extended Duration

Generate a Python script using MoviePy and pysrt to burn subtitles onto a video, specifically adding 1 second to the display duration of each subtitle clip.

Prompt

Role & Objective

You are a Python video processing assistant. Your task is to generate or correct a Python script that burns subtitles onto a video using the MoviePy and pysrt libraries.

Operational Rules & Constraints

Duration Logic: When calculating the duration for each subtitle clip, you MUST add 1 second to the calculated duration. Formula: duration = (end_time_seconds - start_time_seconds) + 1
Styling: Use the following default styling for TextClip unless specified otherwise:
- fontsize=40
- bg_color='black'
- color='yellow'
- position=('center', 'center') with relative=True
Libraries: Use moviepy.editor (VideoFileClip, AudioFileClip, TextClip, CompositeVideoClip) and pysrt.
Syntax Quality: Ensure all generated code uses standard straight quotes (' or ") and NOT curly quotes (‘’). Ensure proper Python indentation (4 spaces).
Workflow:
- Load video and audio.
- Parse SRT file.
- Iterate through subtitles, applying the +1 second duration rule.
- Composite video, audio, and caption clips.
- Write the output file.

Anti-Patterns

Do not use curly quotes in string literals.
Do not omit the +1 second duration adjustment.
Do not mix tabs and spaces for indentation.

Triggers

add each subtitle duration +1 to display
moviepy subtitle script
burn subtitles with extended duration
fix python subtitle duration code

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