Speech Length Calculator - Automatically calculate how long a video should be based on the dialogue in real-time
A free ComfyUI node calculates video duration from dialogue text in real-time, no workflow runs needed.
Developer WhatDreamsCost has released a free, open-source tool for the popular AI workflow platform ComfyUI that solves a persistent headache in AI video generation: timing. The 'Speech Length Calculator' node automatically determines how long a video clip should be based purely on the dialogue script provided. It operates by identifying any text within quotation marks as speech, calculating the total duration needed to speak that text at a natural pace.
The key innovation is its real-time functionality within the node-based ComfyUI interface. Unlike many processes that require executing the entire workflow to see a result, this tool updates the calculated video length instantly as the user types or modifies the dialogue text. This allows for rapid iteration and fine-tuning of scripts. Users can connect any text-generating node to its input, and the duration will continuously adjust, providing immediate feedback crucial for syncing AI-generated visuals with audio.
Available for free download on GitHub, the tool addresses a specific but common pain point. Creators often resort to guesswork when trying to match AI-generated video clips to voiceovers or dialogue, leading to mismatched pacing and wasted renders. By providing a data-driven estimate for clip length, the Speech Length Calculator brings more precision and efficiency to the creative pipeline, making the process of building coherent, timed narratives with AI significantly smoother.
- Calculates video duration from dialogue text in real-time within ComfyUI, no full workflow execution required.
- Identifies text within quotation marks as speech and adjusts the final length based on speech rate.
- Solves the 'guessing game' for AI video/audio sync, available as a free node on GitHub.
Why It Matters
It brings precision and saves time for creators by eliminating guesswork in syncing AI-generated video with dialogue.