cover-gen

Generate platform-optimized video covers and insert them as the first frame.

168|13|Updated Mar 20, 2026
One-click install
npx skills add https://github.com/npc-live/clawfirm --skill cover-gen
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: cover-gen
Source: https://github.com/npc-live/clawfirm/tree/main/app/assets/skills/video-skills/cover-gen
Command: npx skills add https://github.com/npc-live/clawfirm --skill cover-gen

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Manually creating platform-optimized video covers and seamlessly inserting a branded first frame is time-consuming and error-prone. This skill automates the process to ensure consistency across platforms and saves time in video publishing pipelines.

Core Features & Use Cases

  • Automated generation of platform-specific video covers using AI
  • Extraction of a reference frame from the source video to guide style and composition
  • Insertion of the generated cover as the video’s first frame (0.1s) via FFmpeg
  • Supports multiple platforms with distinct aspect ratios and text guidelines
  • Outputs both a cover image and a ready-to-publish video with the first frame included

Quick Start

Provide the path to your raw video and target platform to generate a cover and insert it as the first frame.

Frequently Asked Questions about cover-gen

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I generate platform-optimized video covers and insert them as the first frame?▼

To generate platform-optimized video covers and insert them as the first frame, this skill automates the extraction of a reference frame, computes platform-specific specs, and concatenates a 0.1-second cover clip before the original video using FFmpeg. It outputs both a cover image and a ready-to-publish video.

What is the best way to automate branded thumbnails for social media videos?▼

Automating branded thumbnails for social media videos is best handled by this skill, which uses media_gen to create AI-generated covers tailored to platform guidelines like Douyin, Xiaohongshu, Bilibili, YouTube, and LinkedIn, then seamlessly integrates them into your video publishing pipeline.

Does cover-gen support distinct aspect ratios for platforms like Douyin and YouTube?▼

Yes, cover-gen supports distinct aspect ratios for platforms like Douyin and YouTube by computing platform-specific cover specs during generation, ensuring your video thumbnails meet the required dimensions and text guidelines for each social media platform.

Can I use FFmpeg to insert a 0.1-second cover clip before the original video?▼

Yes, you can use FFmpeg to insert a 0.1-second cover clip before the original video, which this skill automates by generating the cover image with media_gen and then concatenating it with optional audio handling to create a ready-to-publish video file.

What video metadata is needed to generate AI-generated video covers?▼

Generating AI-generated video covers requires extracting video metadata from the source file to compute platform-specific cover specs and extract a reference frame, which guides the style and composition of the final AI-generated thumbnail before FFmpeg concatenation.

Are there limitations when adding a first frame to a video for social media workflows?▼

A limitation when adding a first frame to a video for social media workflows is that the inserted cover clip is fixed at a 0.1-second duration with optional audio handling, meaning complex transitions or longer intro sequences are not supported by this automated concatenation process.