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Agent skill

Ffmpeg Media Info

by benchflow-ai in benchflow-ai/skillsbench

Analyze media file properties - duration, resolution, bitrate, codecs, and stream information

Apache-2.0Auto-check passedMedia & Creative

Install Ffmpeg Media Info

skills CLI
$ npx skills add benchflow-ai/skillsbench --skill ffmpeg-media-info -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install benchflow-ai/skillsbench ffmpeg-media-info --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .claude/skills && cp -r skills-src/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-media-info .claude/skills/ffmpeg-media-info && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
ffmpeg-media-info
GitHub stars
1.8k
Token cost
~699 tokens
SKILL.md length
76 words
Files
1
Skills in repo
189
Repo updated
First seen
Licence
Apache-2.0

At a glance

Analyze media file properties - duration, resolution, bitrate, codecs, and stream information

  • Tasks that involve Video production
  • SKILL.md covers When to Use, Basic Info Commands, Duration and Resolution, plus 6 more sections
  • Calls ffprobe and ffmpeg

What it does

Ffmpeg Media Info is an agent skill from benchflow-ai/skillsbench. Analyze media file properties - duration, resolution, bitrate, codecs, and stream information

Its SKILL.md is about 700 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Media & Creative, covering Video production. It works with FFmpeg. The repository describes itself as: SkillsBench evaluates how well skills work and how effective agents are at using them. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Video production

Example prompts

  • “/ffmpeg-media-info”

What it can do on your machine

Read from SKILL.md and the folder at commit 9a1f4dd. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • ffprobe
    • ffmpeg

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Ffmpeg Media Info loads about 699 tokens when it runs. Until then it costs about 28 tokens; SKILL.md has 76 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~28
When it runs · the whole SKILL.md, loaded when a task matches
~699

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from benchflow-ai/skillsbench at commit 9a1f4dd, republished under its Apache-2.0 licence (© benchflow-ai). 76 words, ~699 tokens.

Download SKILL.mdSave it as .claude/skills/ffmpeg-media-info/SKILL.md (or your agent's skills folder).
name
ffmpeg-media-info
description
Analyze media file properties - duration, resolution, bitrate, codecs, and stream information

FFmpeg Media Info Skill

Extract and analyze media file metadata using ffprobe and ffmpeg.

When to Use

  • Get video/audio file properties
  • Check codec information
  • Verify resolution and bitrate
  • Analyze stream details
  • Debug media file issues

Basic Info Commands

bash
# Show all file info
ffmpeg -i input.mp4

# JSON format (detailed)
ffprobe -v quiet -print_format json -show_format -show_streams input.mp4

# Simple format
ffprobe -v quiet -print_format json -show_format input.mp4

Duration

bash
# Get duration in seconds
ffprobe -v error -show_entries format=duration \
  -of default=noprint_wrappers=1:nokey=1 input.mp4

# Duration with timestamp format
ffprobe -v error -show_entries format=duration \
  -of default=noprint_wrappers=1:nokey=1 -sexagesimal input.mp4

Resolution

bash
# Get video resolution
ffprobe -v error -select_streams v:0 \
  -show_entries stream=width,height \
  -of csv=s=x:p=0 input.mp4

# Get resolution as JSON
ffprobe -v error -select_streams v:0 \
  -show_entries stream=width,height \
  -of json input.mp4

Bitrate

bash
# Get overall bitrate
ffprobe -v error -show_entries format=bit_rate \
  -of default=noprint_wrappers=1:nokey=1 input.mp4

# Get video bitrate
ffprobe -v error -select_streams v:0 \
  -show_entries stream=bit_rate \
  -of default=noprint_wrappers=1:nokey=1 input.mp4

Codec Information

bash
# Video codec
ffprobe -v error -select_streams v:0 \
  -show_entries stream=codec_name,codec_long_name \
  -of default=noprint_wrappers=1 input.mp4

# Audio codec
ffprobe -v error -select_streams a:0 \
  -show_entries stream=codec_name,codec_long_name \
  -of default=noprint_wrappers=1 input.mp4

Sample Rate and Channels

bash
# Audio sample rate
ffprobe -v error -select_streams a:0 \
  -show_entries stream=sample_rate \
  -of default=noprint_wrappers=1:nokey=1 input.mp4

# Audio channels
ffprobe -v error -select_streams a:0 \
  -show_entries stream=channels \
  -of default=noprint_wrappers=1:nokey=1 input.mp4

Stream Count

bash
# Count video streams
ffprobe -v error -select_streams v -show_entries stream=index \
  -of csv=p=0 input.mp4 | wc -l

# Count audio streams
ffprobe -v error -select_streams a -show_entries stream=index \
  -of csv=p=0 input.mp4 | wc -l

Frame Rate

bash
# Get frame rate
ffprobe -v error -select_streams v:0 \
  -show_entries stream=r_frame_rate \
  -of default=noprint_wrappers=1:nokey=1 input.mp4

Notes

  • Use -v error to suppress warnings
  • -of json for structured output
  • -select_streams to target specific streams (v:0 for first video, a:0 for first audio)

© benchflow-ai, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in tasks/multilingual-video-dubbing/environment/skills/ffmpeg-media-info of benchflow-ai/skillsbench.

Open the folder on GitHubat commit 9a1f4dd

Compare with similar skills

Ffmpeg Media Info next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Ffmpeg Media Info compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Ffmpeg Media Info this skillbenchflow-ai/skillsbench1.8k—~699Automated safety check: PassApache-2.0
Video Understandcalesthio/OpenMontage66k—~841Automated safety check: PassAGPL-3.0
HyperFrames Video Entry Pointheygen-com/hyperframes60k3 repos~5.2kAutomated safety check: PassApache-2.0
Video Shotseternityspring/reelbench-skills8781 repos~1.8kAutomated safety check: NotesApache-2.0
Mobile Demo Film Editorsuperset-sh/superset15k—~1.8kAutomated safety check: PassCustom licence
Video Editcalesthio/OpenMontage66k—~855Automated safety check: NotesAGPL-3.0

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    calesthio/OpenMontage

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Works with

Categories

Questions about Ffmpeg Media Info

What does Ffmpeg Media Info do?

Analyze media file properties - duration, resolution, bitrate, codecs, and stream information. Ffmpeg Media Info is an agent skill from benchflow-ai/skillsbench.

When should I use Ffmpeg Media Info?

Ffmpeg Media Info fits situations like: tasks that involve Video production.

How do I install Ffmpeg Media Info in Claude Code?

Run `npx skills add benchflow-ai/skillsbench --skill ffmpeg-media-info -a claude-code`. Or copy the skill folder (tasks/multilingual-video-dubbing/environment/skills/ffmpeg-media-info in benchflow-ai/skillsbench) into .claude/skills/ffmpeg-media-info in your project. Claude Code loads it when a task matches its description.

How do I install Ffmpeg Media Info in Codex?

Run `npx skills add benchflow-ai/skillsbench --skill ffmpeg-media-info -a codex`. Or copy the skill folder (tasks/multilingual-video-dubbing/environment/skills/ffmpeg-media-info in benchflow-ai/skillsbench) into .agents/skills/ffmpeg-media-info in your project. Codex loads it when a task matches its description.

Can I use Ffmpeg Media Info in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add benchflow-ai/skillsbench --skill ffmpeg-media-info -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/ffmpeg-media-info, .gemini/skills/ffmpeg-media-info, .github/skills/ffmpeg-media-info and .opencode/skills/ffmpeg-media-info in your project.

What does Ffmpeg Media Info need to run?

Going by SKILL.md and its folder, Ffmpeg Media Info needs the command-line tools its instructions call (ffprobe and ffmpeg).

Does Ffmpeg Media Info access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Ffmpeg Media Info safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Ffmpeg Media Info use?

Ffmpeg Media Info is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Ffmpeg Media Info use?

About 699 tokens (SKILL.md is roughly 2.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Ffmpeg Media Info?

Skills that share tags, products or a category with Ffmpeg Media Info: Video Understand (calesthio/OpenMontage, 66k stars), HyperFrames Video Entry Point (heygen-com/hyperframes, 60k stars), Video Shots (eternityspring/reelbench-skills, 878 stars) and Mobile Demo Film Editor (superset-sh/superset, 15k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Ffmpeg Media Info?

benchflow-ai (a GitHub organization) maintains it in benchflow-ai/skillsbench, which has 1,835 GitHub stars. The repository holds 189 skills in this directory. The repository was last updated on July 23, 2026.

Source: benchflow-ai/skillsbench on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.