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Use when user asks to convert, compress, trim, resize, extract audio, add subtitles, create GIFs, or process video/audio files
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
SOC 직업 분류 기준
| name | FFmpeg Media Processing |
| description | Use when user asks to convert, compress, trim, resize, extract audio, add subtitles, create GIFs, or process video/audio files |
| dependencies | ffmpeg |
FFmpeg is a universal media converter that reads from multiple inputs, applies filters/transformations, and writes to multiple outputs.
Invoke this skill when the user wants to:
| User Says | Claude Does |
|---|---|
| "Convert video.mkv to mp4" | ffmpeg -i video.mkv output.mp4 |
| "Extract audio from movie.mp4" | ffmpeg -i movie.mp4 -vn audio.mp3 |
| "Compress this video" | ffmpeg -i input.mp4 -crf 23 output.mp4 |
| "Make a GIF from the first 5 seconds" | ffmpeg -t 5 -i input.mp4 -vf "fps=10,scale=320:-1" output.gif |
| "Add subtitles to my video" | ffmpeg -i input.mp4 -vf subtitles=subs.srt output.mp4 |
ffmpeg [global_options] {[input_file_options] -i input_url} ... {[output_file_options] output_url} ...
IMPORTANT: Order matters! Options apply to the next specified file and reset between files.
| Option | Purpose |
|---|---|
-i url | Specify input file |
-c copy | Stream copy (no re-encode, fast) |
-c:v codec | Set video codec (libx264, libx265, libvpx-vp9) |
-c:a codec | Set audio codec (aac, libmp3lame, libopus) |
-vf filter | Apply video filter |
-af filter | Apply audio filter |
-ss time | Seek to position |
-t duration | Limit duration |
-y | Overwrite output |
-vn | No video |
-an | No audio |
ffmpeg -i input.mkv output.mp4
ffmpeg -i input.mp4 -c:v libvpx-vp9 -c:a libopus output.webm
ffmpeg -i video.mp4 -vn -c:a copy audio.aac
ffmpeg -i video.mp4 -vn -c:a libmp3lame -b:a 192k audio.mp3
ffmpeg -i input.mp4 -c:v libx264 -crf 23 -c:a copy output.mp4
ffmpeg -ss 00:01:00 -i input.mp4 -t 00:00:30 -c copy output.mp4
ffmpeg -i input.mp4 -vf scale=1280:720 output.mp4
ffmpeg -i input.mp4 -vf scale=640:-1 output.mp4
ffmpeg -i input.mp4 -vf "fps=10,scale=320:-1" output.gif
ffmpeg -i input.mp4 -vf "drawtext=text='Hello':fontsize=36:fontcolor=white:x=(w-text_w)/2:y=(h-text_h)/2" output.mp4
ffmpeg -i input.mp4 -vf "subtitles=subs.srt" output.mp4
ffmpeg -i input.mp4 -vf fps=1 frame_%04d.png
# 2x speed
ffmpeg -i input.mp4 -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" output.mp4
# Create filelist.txt with: file 'part1.mp4' (one per line)
ffmpeg -f concat -safe 0 -i filelist.txt -c copy output.mp4
| Option | Purpose |
|---|---|
-r fps | Set frame rate |
-s WxH | Set resolution |
-crf N | Quality (0-51, lower=better, default 23) |
-b:v bitrate | Set video bitrate |
-preset name | Encoding speed (ultrafast to veryslow) |
| Option | Purpose |
|---|---|
-ar freq | Sample rate (44100, 48000) |
-ac N | Channels (1=mono, 2=stereo) |
-b:a bitrate | Audio bitrate |
| Filter | Example | Purpose |
|---|---|---|
| scale | scale=1280:720 | Resize |
| crop | crop=640:480:100:50 | Crop (w:h:x:y) |
| transpose | transpose=1 | Rotate 90° CW |
| hflip/vflip | hflip | Mirror |
| fade | fade=t=in:d=2 | Fade in/out |
| drawtext | drawtext=text='Hi' | Text overlay |
| subtitles | subtitles=subs.srt | Burn subtitles |
| overlay | overlay=10:10 | Image overlay |
ffprobe input.mp4
ffprobe -v quiet -print_format json -show_format -show_streams input.mp4
-c copy when possible (fast, no quality loss)-ss before -i for fast seeking-y to overwrite without prompts-crf 18-28 for quality controlffprobe firstFor complete reference, see REFERENCE.md, CONCEPTS.md, and ADVANCED.md.
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