What are the recommended hook durations for TikTok and Reels?

For maximum impact, hook animations should be fast and dramatic, typically completing within 0.4 to 0.5 seconds at 60fps.

How do I calculate the 'd' parameter in FFmpeg zoompan?

The 'd' parameter is measured in frames. To calculate it, multiply your desired duration in seconds by the frame rate (e.g., 2 seconds at 30fps = 60 frames).

What is the difference between centiseconds and milliseconds in ASS subtitles?

Karaoke tags (\k) use centiseconds (1/100s), while animation tags (\t) and fade tags (\fad) use milliseconds (1/1000s). This skill provides precise conversion tables for both.

How fast should captions be for optimal readability?

The recommended default is 160-180 Words Per Minute (WPM) for average viewers, though accessibility standards may require 120-140 WPM.

FFmpeg & Subtitle Timing Reference

Name: FFmpeg & Subtitle Timing Reference
Author: JosiahSiegel

byJosiahSiegel

•

Gestión de Contenido

Provides definitive time unit references and optimal duration guidelines for FFmpeg filters and ASS/SSA subtitle animations.

This skill serves as a comprehensive technical guide for developers and video editors utilizing programmatic video generation. It disambiguates the confusing landscape of time units—resolving conflicts between FFmpeg's seconds, ASS's centiseconds, and animation milliseconds—while providing psychology-based recommendations for viewer engagement. It is particularly useful for optimizing high-performance video hooks for social media platforms like TikTok and Reels, ensuring precise frame-rate calculations and professional-grade caption readability.

Características Principales

01Disambiguation of ASS/SSA karaoke centiseconds and animation milliseconds.

02Platform-specific timing profiles for TikTok, Shorts, and Instagram Reels.

03Cross-reference tables for FFmpeg filter units (seconds vs. frames).

047 GitHub stars

05Human perception thresholds and WPM-based caption readability standards.

06Mathematical formulas for frame-rate based zoompan and transition calculations.

Casos de Uso

01Calculating frame-exact durations for programmatic FFmpeg video transitions and zooms.

02Synchronizing complex word-by-word karaoke animations with audio precisely.

03Optimizing social media hooks to fit within the 1.3-second attention threshold.

Características Principales

01Disambiguation of ASS/SSA karaoke centiseconds and animation milliseconds.

02Platform-specific timing profiles for TikTok, Shorts, and Instagram Reels.

03Cross-reference tables for FFmpeg filter units (seconds vs. frames).

047 GitHub stars

05Human perception thresholds and WPM-based caption readability standards.

06Mathematical formulas for frame-rate based zoompan and transition calculations.

Casos de Uso

01Calculating frame-exact durations for programmatic FFmpeg video transitions and zooms.

02Synchronizing complex word-by-word karaoke animations with audio precisely.

03Optimizing social media hooks to fit within the 1.3-second attention threshold.