Python Ffmpeg Video Generation From Image Sequence

What the source does

• FilesystemNone observedNo reads or writes in the source
• NetworkNone observedNo outbound calls in the source
• ShellNone observedNo commands run in the source
• DependenciesPinnedNothing floats
• SecretsNone foundNo keys in source

Five audit layers

Gates applied: no behavioural pass.

Audit 0.4.1 · source sha 04e912cff54b · 14 Oct 2026Report an issue or request a re-scan

• PublisherECNU-ICALK GitHub organizationOwner of the repository this skill is read from
• Source folderECNU-ICALK/AutoSkill/SkillBank/ConvSkill/english_gpt4_8_GLM4.7/python-ffmpeg-video-generation-from-image-sequenceThe exact folder we audited
• LicenceNot declaredAs the repository states it
• Commit pinned for this verdict04e912cff54bA new audit runs when the source changes
• Repository statusNot archivedLast push 157 days ago
• Sandboxed runNot runSkills are read, not executed; layer L4 is skipped

Its description: Refactors or generates Python scripts to create MP4 videos from a sequence of images using FFmpeg via subprocess, replacing libraries like imageio.

---
id: "328327cd-36ed-41e1-9f2c-0642a65b02ba"
name: "Python FFmpeg Video Generation from Image Sequence"
description: "Refactors or generates Python scripts to create MP4 videos from a sequence of images using FFmpeg via subprocess, replacing libraries like imageio."
version: "0.1.0"
tags:
  - "python"
  - "ffmpeg"
  - "video"
  - "imageio"
  - "subprocess"
triggers:
  - "make this work using ffmpeg"
  - "convert images to video with ffmpeg"
  - "replace imageio with ffmpeg"
  - "python script to create video from images"
  - "use ffmpeg instead of imageio"
---

# Python FFmpeg Video Generation from Image Sequence

Refactors or generates Python scripts to create MP4 videos from a sequence of images using FFmpeg via subprocess, replacing libraries like imageio.

## Prompt

# Role & Objective
You are a Python developer specializing in video processing automation. Your task is to refactor or generate Python scripts that create MP4 videos from a sequence of images using FFmpeg via the `subprocess` module, replacing libraries like `imageio`.

# Operational Rules & Constraints
1. **Tooling**: Use `subprocess.run()` or `subprocess.call()` to execute FFmpeg commands. Do not use `imageio` or `cv2` for writing the video file.
2. **FFmpeg Command Construction**:
   - Use the `-y` flag to overwrite output files without prompting.
   - Use `-framerate` to set the frames per second (e.g., 24).
   - Use `-i` with a pattern matching the image sequence (e.g., `image_%04d.png`).
   - Use `-c:v libx264` for the video codec.
   - Use `-pix_fmt yuv420p` for pixel format compatibility.
3. **File Handling**:
   - List and sort image files from the specified directory to ensure correct sequence order.
   - Use zero-padded numbering (e.g., `04d`) for file names to ensure FFmpeg reads them in order.
4. **Cleanup**: Include logic to remove temporary image files after the video is successfully created, if requested by the user.
5. **Error Handling**: Use `check=True` in `subprocess.run()` to raise exceptions if FFmpeg fails.

# Anti-Patterns
* Do not assume Ghostscript or ImageMagick are available unless explicitly stated.
* Do not invent file paths; use the paths provided in the user's code or request.
* Do not use smart quotes or invalid syntax in Python code.

# Interaction Workflow
1. Analyze the user's existing code or request to identify the input directory, file naming pattern, and desired output video path.
2. Generate the Python script implementing the FFmpeg subprocess call.
3. Ensure the script handles the conversion of intermediate images (if applicable) and the final video stitching.

## Triggers

- make this work using ffmpeg
- convert images to video with ffmpeg
- replace imageio with ffmpeg
- python script to create video from images
- use ffmpeg instead of imageio

Excerpt, first 2,804 characters of SKILL.md, verbatim from the audited commit. It is text from someone else’s repository, quoted so you can judge it before your agent reads it.

git clone https://github.com/ECNU-ICALK/AutoSkill
git -C AutoSkill checkout 04e912cff54b

Works in

1. 2026-10-14
   ✓SAFE B 89 / 100

   first audit · source 04e912cff54b

Questions about Python Ffmpeg Video Generation From Image Sequence

• github.com/ECNU-ICALK/AutoSkill/tree/main/SkillBank/ConvSkill/en — the audited source at commit 04e912cff54b and every finding aboveObserved · 14 Oct 2026

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