ffmpeg

Video and audio processing with FFmpeg. Use for format conversion, resizing, compression, audio extraction, and preparing assets for Remotion. Triggers include converting GIF to MP4, resizing video, extracting audio, compressing files, or any media transformation task.

Quality

82%

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Securityby

Passed

No findings from the security scan

Quality

Content

72%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A highly actionable, well-organized FFmpeg command catalog with executable examples throughout. Its weaknesses are structural: a long monolithic file with no progressive disclosure via references, and batch operations that lack inline validation despite a general error-handling section.

Suggestions

Add an ffprobe validation step (e.g., verify codec/duration) inside the 'Batch Convert GIFs' and 'Batch Export for All Platforms' scripts so batch outputs are checked, not just produced.

Move the platform-specific optimization details and/or the error-handling reference into separate files under references/ and link to them from SKILL.md to shorten the body and enable progressive disclosure.

Trim the closing 'Feedback & Contributions' section and deduplicate the GIF→MP4 recipe that appears in both Quick Reference and Batch Convert.

Dimension	Reasoning	Score
Conciseness	Mostly efficient — commands are paired with brief, FFmpeg-specific flag explanations rather than padding — but the ~430-line body has some repetition (GIF→MP4 in two sections) and a non-essential 'Feedback & Contributions' coda that could be trimmed.	4 / 5
Actionability	Copy-paste-ready ffmpeg/ffprobe commands cover the common cases (convert, resize, compress, trim, speed, concat, platform export) with concrete flags and example paths.	5 / 5
Workflow Clarity	The platform-optimization section has a clear sequenced workflow with a diagram and an Error Handling section provides validation feedback loops, but the batch operations ('Batch Convert GIFs', 'Batch Export for All Platforms') run without inline validation checkpoints, triggering the batch-operations cap at 3.	3 / 5
Progressive Disclosure	Well-organized with clear section headers, but at ~430 lines it is a single monolithic file with no bundle references; content like platform-specific output and error handling that could live in separate reference files is inlined.	3 / 5
	Total	15 / 20 Passed

Description

92%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, specific description that names concrete capabilities and provides explicit trigger guidance tied to FFmpeg and Remotion. Only minor gap is the absence of file-extension synonyms among the trigger terms.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions — 'format conversion, resizing, compression, audio extraction, and preparing assets for Remotion' — covering the domain comprehensively rather than gesturing at it.	5 / 5
Completeness	Explicitly answers both what ('Video and audio processing with FFmpeg...') and when ('Use for... Triggers include...') with concrete trigger phrases, matching the top anchor.	5 / 5
Trigger Term Quality	Strong natural triggers ('converting GIF to MP4, resizing video, extracting audio, compressing files') but missing common synonyms and file extensions like .mp4, .mov, or 'transcode'.	4 / 5
Distinctiveness Conflict Risk	Scoped to FFmpeg and Remotion asset prep with distinct triggers, giving it a clear niche with minimal overlap against other skills.	5 / 5
	Total	19 / 20 Passed

Validation

100%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository: calesthio/OpenMontage
Path: .agents/skills/ffmpeg/SKILL.md
Commit: 08e2151

Reviewed: 2 days ago

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