Audio/video studio production — multi-track editing, color grading, motion graphics, compositing, live streaming, screen recording, YouTube publishing.
インストールする前に、エージェントに与えられる指示の中身を確認できます。
Combines ffmpeg-media (codecs/formats), audio-engineering (mastering/mixing), and gource-visualizer (repo visualization) into a unified production toolkit for video content creation, live streaming, and multimedia publishing.
# 1. Screen recording (with audio)
ffmpeg -f x11grab -video_size 1920x1080 -framerate 30 -i :0.0 \
-f pulse -i default \
-c:v libx264 -preset ultrafast -crf 18 \
-c:a aac -b:a 192k \
raw_recording.mkv
# 2. Trim to content
ffmpeg -ss 00:00:05 -i raw_recording.mkv -to 00:45:00 -c copy trimmed.mkv
# 3. Add intro + outro
cat > concat.txt << EOF
file 'intro.mp4'
file 'trimmed.mkv'
file 'outro.mp4'
EOF
ffmpeg -f concat -safe 0 -i concat.txt -c:v libx264 -c:a aac assembled.mp4
# 4. Color grade + normalize audio
ffmpeg -i assembled.mp4 \
-vf "eq=brightness=0.04:contrast=1.1:saturation=1.15,unsharp=5:5:0.5" \
-af "loudnorm=I=-14:TP=-1:LRA=11" \
-c:v libx264 -preset medium -crf 20 -pix_fmt yuv420p \
-c:a aac -b:a 192k \
-movflags +faststart \
final.mp4
# 5. Generate thumbnail
ffmpeg -i final.mp4 -ss 00:00:30 -frames:v 1 \
-vf "scale=1280:720" thumbnail.jpg
# Record screen + webcam PiP
ffmpeg -f x11grab -video_size 1920x1080 -framerate 30 -i :0.0 \
-f v4l2 -video_size 320x240 -framerate 30 -i /dev/video0 \
-f pulse -i default \
-filter_complex "[0:v][1:v]overlay=W-w-20:H-h-20[out]" \
-map "[out]" -map 2:a \
-c:v libx264 -preset fast -crf 22 \
-c:a aac -b:a 128k \
presentation.mp4
# Record with mouse cursor highlight
ffmpeg -f x11grab -video_size 1920x1080 -framerate 30 \
-draw_mouse 1 -i :0.0 \
-f pulse -i default \
-c:v libx264 -preset fast -crf 20 \
-c:a aac -b:a 128k \
tutorial.mp4
# Add chapter markers (for YouTube)
ffmpeg -i tutorial.mp4 -c copy \
-metadata:c:0 title="Introduction" \
-metadata:c:0 timebase=1/1000 \
chaptered.mp4
# Apply a 3D LUT (cube format)
ffmpeg -i input.mp4 -vf "lut3d=cinematic.cube" graded.mp4
# Apply with blend (50% strength)
ffmpeg -i input.mp4 -vf "split[a][b];[b]lut3d=cinematic.cube[c];[a][c]blend=all_opacity=0.5" graded.mp4
# Lift/Gamma/Gain (shadows/midtones/highlights)
ffmpeg -i input.mp4 -vf "\
colorbalance=rs=0.1:gs=-0.05:bs=0.15:\
rm=0:gm=0:bm=0:\
rh=-0.05:gh=0:bh=0.05" \
corrected.mp4
# White balance correction (warm up)
ffmpeg -i input.mp4 -vf "colortemperature=temperature=6500" warm.mp4
# Curves (S-curve for contrast)
ffmpeg -i input.mp4 -vf "curves=master='0/0 0.25/0.15 0.5/0.5 0.75/0.85 1/1'" contrast.mp4
# Fade-in title card (2 seconds)
ffmpeg -i input.mp4 -vf "\
drawtext=text='Episode Title':\
fontsize=72:fontcolor=white@0.0:\
x=(w-text_w)/2:y=(h-text_h)/2:\
alpha='if(lt(t,1),t,if(lt(t,3),1,if(lt(t,4),4-t,0)))'" \
titled.mp4
# Lower third (name + title)
ffmpeg -i input.mp4 -vf "\
drawbox=x=0:y=ih-120:w=500:h=120:color=black@0.7:t=fill,\
drawtext=text='Jane Doe':fontsize=36:fontcolor=white:x=20:y=ih-110,\
drawtext=text='Software Engineer':fontsize=24:fontcolor=0xcccccc:x=20:y=ih-65" \
lower_third.mp4
# Crossfade between two clips (1 second overlap)
ffmpeg -i clip1.mp4 -i clip2.mp4 \
-filter_complex "\
[0:v]trim=0:10,setpts=PTS-STARTPTS[v0];\
[1:v]trim=0:10,setpts=PTS-STARTPTS[v1];\
[v0][v1]xfade=transition=fade:duration=1:offset=9[vout];\
[0:a]atrim=0:10,asetpts=PTS-STARTPTS[a0];\
[1:a]atrim=0:10,asetpts=PTS-STARTPTS[a1];\
[a0][a1]acrossfade=d=1[aout]" \
-map "[vout]" -map "[aout]" crossfade.mp4
# Available xfade transitions:
# fade, wipeleft, wiperight, wipeup, wipedown, slideleft, slideright,
# slideup, slidedown, circlecrop, circleopen, circleclose, dissolve,
# pixelize, diagtl, diagtr, diagbl, diagbr, hlslice, hrslice,
# vuslice, vdslice, hblur, fadegrays, squeezeh, squeezev
# Webcam overlay (bottom right, 25% size)
ffmpeg -i screen.mp4 -i webcam.mp4 \
-filter_complex "\
[1:v]scale=iw/4:ih/4[pip];\
[0:v][pip]overlay=W-w-20:H-h-20" \
-c:v libx264 -crf 22 -c:a aac pip.mp4
# Animated PiP (slides in from right)
ffmpeg -i screen.mp4 -i webcam.mp4 \
-filter_complex "\
[1:v]scale=320:240[pip];\
[0:v][pip]overlay=x='if(lt(t,1),W,W-w-20)':y=H-h-20" \
animated_pip.mp4
# Two-pass stabilization with vidstab
# Pass 1: analyze
ffmpeg -i shaky.mp4 -vf vidstabdetect=shakiness=5:accuracy=15 -f null -
# Pass 2: apply
ffmpeg -i shaky.mp4 -vf vidstabtransform=smoothing=10:input=transforms.trf stabilized.mp4
# Timelapse from photos (one frame per image)
ffmpeg -framerate 30 -pattern_type glob -i 'photos/*.jpg' \
-c:v libx264 -crf 18 -pix_fmt yuv420p timelapse.mp4
# Speed ramp (normal → 4x → normal)
ffmpeg -i input.mp4 -filter_complex "\
[0:v]trim=0:10,setpts=PTS-STARTPTS[v1];\
[0:v]trim=10:30,setpts=0.25*(PTS-STARTPTS)[v2];\
[0:v]trim=30:40,setpts=PTS-STARTPTS[v3];\
[v1][v2][v3]concat=n=3:v=1:a=0[out]" \
-map "[out]" speed_ramp.mp4
# Smooth slow motion (frame interpolation with minterpolate)
ffmpeg -i input.mp4 -vf "minterpolate=fps=120:mi_mode=mci:mc_mode=aobmc:vsbmc=1" \
-r 30 slowmo.mp4
# Stream to YouTube via RTMP
ffmpeg -f x11grab -video_size 1920x1080 -framerate 30 -i :0.0 \
-f pulse -i default \
-c:v libx264 -preset veryfast -maxrate 4500k -bufsize 9000k \
-pix_fmt yuv420p -g 60 \
-c:a aac -b:a 128k -ar 44100 \
-f flv "rtmp://a.rtmp.youtube.com/live2/YOUR_STREAM_KEY"
# Stream to Twitch
ffmpeg -f x11grab -video_size 1920x1080 -framerate 30 -i :0.0 \
-f pulse -i default \
-c:v libx264 -preset veryfast -maxrate 6000k -bufsize 12000k \
-pix_fmt yuv420p -g 60 \
-c:a aac -b:a 160k -ar 44100 \
-f flv "rtmp://live.twitch.tv/app/YOUR_STREAM_KEY"
| Format | Ratio | Resolution | Use |
|---|---|---|---|
| Widescreen | 16:9 | 1920x1080 | YouTube, presentations |
| Vertical | 9:16 | 1080x1920 | TikTok, Reels, Shorts |
| Square | 1:1 | 1080x1080 | Instagram feed |
| Ultrawide | 21:9 | 2560x1080 | Cinematic |
| Classic | 4:3 | 1440x1080 | Legacy, some webcams |
| Cinema | 2.39:1 | 2048x858 | Film standard |
# Add letterbox (16:9 → 21:9 cinematic bars)
ffmpeg -i input.mp4 -vf "pad=iw:iw*9/21:(ow-iw)/2:(oh-ih)/2:black" cinematic.mp4
# Convert vertical to horizontal (blur background)
ffmpeg -i vertical.mp4 -filter_complex "\
[0:v]scale=1920:1080:force_original_aspect_ratio=increase,crop=1920:1080,boxblur=20[bg];\
[0:v]scale=-1:1080[fg];\
[bg][fg]overlay=(W-w)/2:0" \
horizontal_blurbg.mp4
-movflags +faststart for progressive download-pix_fmt yuv420p for compatibilitydrawtext filter| Asset | Role |
|---|---|
ffmpeg-media skill | Codec/format foundation |
audio-engineering skill | Audio mastering/mixing |
ffmpeg-processor agent | Format conversion |
audio-engineer agent | Audio mastering |
podcast-producer agent | Podcast pipeline |
music-analyzer agent | Audio analysis |
gource-visualizer skill | Repository visualization → video |
まだレビューはありません。使ってみた感想をお寄せください。
概要と使いどころ
Provides web accessibility best practices for semantic HTML, ARIA, keyboard navigation, color contrast, and screen reader patterns. Use when building UI components, reviewing accessibility, or when user mentions 'a11y', 'accessibility', 'ARIA', 'screen reader', 'keyboard navigation', 'WCAG'.
日本語の概要は準備中です。原文の説明を表示しています。
Active listening techniques for effective communication. Covers attending behaviors, paraphrasing, reflective listening, clarifying questions, empathic response, barriers to listening, listening in conflict, and cross-cultural listening. Use when building listening skills, improving understanding in conversation, mediating disputes, or analyzing communication breakdowns.
日本語の概要は準備中です。原文の説明を表示しています。
Adversarial spec-compliance PR review — cross-references diffs against approved specs, verifies runtime claims against source, detects competing PRs, audits scope/convention compliance. Use before merging.
日本語の概要は準備中です。原文の説明を表示しています。
Provides best practices for AI agent orchestration including MCP servers, A2A protocol, multi-agent coordination, and swarm architectures. Use when designing agent systems, configuring MCP servers, setting up agent teams, or when user mentions 'MCP', 'A2A', 'agent orchestration', 'multi-agent', 'swarm', 'agent team', 'LangGraph', 'CrewAI', 'AutoGen'.
日本語の概要は準備中です。原文の説明を表示しています。
Symbolic manipulation, equation solving, and algebraic structures for mathematical reasoning. Covers distributive law, factoring, completing the square, linear through polynomial equation solving, systems of equations (substitution, elimination, Gaussian elimination, matrix methods), algebraic structures (groups, rings, fields), modular arithmetic, polynomial theory, and inequalities. Use when solving equations, simplifying expressions, working with algebraic structures, or performing symbolic manipulation.
日本語の概要は準備中です。原文の説明を表示しています。
Understanding how algorithmic systems shape what users see, know, and do -- from recommendation feeds to search ranking to credit scoring to hiring software. Covers the mechanics of recommendation systems, algorithmic bias and its sources, personalization's effects on information diets, opacity and accountability, AI limitations (hallucination, confident wrongness), and the human-in-the-loop question. Use when a learner needs to think critically about why particular content reached them.
日本語の概要は準備中です。原文の説明を表示しています。