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ffmpeg\n  - ffprobe\n  - video processing\n  - audio conversion\n  - codec\n  - transcoding\n  - filter_complex\n  - h264\n  - h265\n  - mp4\n  - mkv\n  - hardware acceleration\nrole: specialist\nscope: implementation\noutput-format: shell-command\n---\n\n# Donson Intelligent Editing\n\nComprehensive guide for professional video and audio manipulation using FFmpeg and FFprobe.\n\n## Core Concepts\n\nFFmpeg is the leading multimedia framework, able to **decode, encode, transcode, mux, demux, stream, filter and play** almost anything that humans and machines have created. It is a command-line tool that processes streams through a complex pipeline of demuxers, decoders, filters, encoders, and muxers.\n\n## Common Operations\n\n```bash\n# Basic Transcoding (MP4 to MKV)\nffmpeg -i input.mp4 output.mkv\n\n# Change Video Codec (to H.265/HEVC)\nffmpeg -i input.mp4 -c:v libx265 -crf 28 -c:a copy output.mp4\n\n# Extract Audio (No Video)\nffmpeg -i input.mp4 -vn -c:a libmp3lame -q:a 2 output.mp3\n\n# Resize/Scale Video\nffmpeg -i input.mp4 -vf \"scale=1280:720\" output.mp4\n\n# Cut Video (Start at 10s, Duration 30s)\nffmpeg -i input.mp4 -ss 00:00:10 -t 00:00:30 -c copy output.mp4\n\n# Fast Precise Cut (Re-encoding only the cut points is complex, so standard re-encoding is safer for precision)\nffmpeg -ss 00:00:10 -i input.mp4 -to 00:00:40 -c:v libx264 -crf 23 -c:a aac output.mp4\n\n# Concatenate Files (using demuxer)\n# Create filelist.txt: file 'part1.mp4' \\n file 'part2.mp4'\nffmpeg -f concat -safe 0 -i filelist.txt -c copy output.mp4\n\n# Speed Up/Slow Down Video (2x speed)\nffmpeg -i input.mp4 -filter_complex \"[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]\" -map \"[v]\" -map \"[a]\" output.mp4\n```\n\n---\n\n## Processing Categories & When to Use\n\n### Codecs & Quality\n| Option | Use When |\n|-----------|----------|\n| `-c:v libx264` | Standard H.264 encoding (best compatibility) |\n| `-c:v libx265` | H.265/HEVC encoding (best compression/quality) |\n| `-crf [0-51]` | Constant Rate Factor (lower is higher quality, 18-28 recommended) |\n| `-preset` | Encoding speed vs compression (ultrafast, medium, veryslow) |\n| `-c:a copy` | Pass-through audio without re-encoding (saves time/quality) |\n\n### Filters & Manipulation\n| Filter | Use When |\n|-----------|----------|\n| `scale` | Changing resolution (e.g., `scale=1920:-1` for 1080p width) |\n| `crop` | Removing edges (e.g., `crop=w:h:x:y`) |\n| `transpose` | Rotating video (1=90deg CW, 2=90deg CCW) |\n| `fps` | Changing frame rate (e.g., `fps=30`) |\n| `drawtext` | Adding text overlays/watermarks |\n| `overlay` | Picture-in-picture or adding image watermarks |\n| `fade` | Adding fade-in/out effects (e.g., `fade=in:0:30` for first 30 frames) |\n| `volume` | Adjusting audio levels (e.g., `volume=1.5` for 150% volume) |\n| `setpts` | Changing video speed (e.g., `setpts=0.5*PTS` for double speed) |\n| `atempo` | Changing audio speed without pitch shift (0.5 to 2.0) |\n\n### Inspection & Metadata\n| Tool/Option | Use When |\n|-----------|----------|\n| `ffprobe -v error -show_format -show_streams` | Getting detailed technical info of a file |\n| `-metadata title=\"Name\"` | Setting global metadata tags |\n| `-map` | Selecting specific streams (e.g., `-map 0:v:0 -map 0:a:1`) |\n\n---\n\n## Advanced: Complex Filtergraphs\n\nUse `filter_complex` when you need to process multiple inputs or create non-linear filter chains.\n\n```bash\n# Example: Adding a watermark at the bottom right\nffmpeg -i input.mp4 -i watermark.png -filter_complex \"overlay=main_w-overlay_w-10:main_h-overlay_h-10\" output.mp4\n\n# Example: Vertical Stack (2 videos)\nffmpeg -i top.mp4 -i bottom.mp4 -filter_complex \"vstack=inputs=2\" output.mp4\n\n# Example: Side-by-Side (2 videos)\nffmpeg -i left.mp4 -i right.mp4 -filter_complex \"hstack=inputs=2\" output.mp4\n\n# Example: Grid (4 videos 2x2)\nffmpeg -i v1.mp4 -i v2.mp4 -i v3.mp4 -i v4.mp4 -filter_complex \"[0:v][1:v]hstack=inputs=2[top];[2:v][3:v]hstack=inputs=2[bottom];[top][bottom]vstack=inputs=2\" output.mp4\n\n# Example: Fade Transition (Simple crossfade between two clips)\n# Requires manual offset calculation, using xfade is better\nffmpeg -i input1.mp4 -i input2.mp4 -filter_complex \"xfade=transition=fade:duration=1:offset=9\" output.mp4\n```\n\n## Pro Editing Tips & Techniques\n\n### 1. High-Quality GIF Creation\nStandard conversion often results in poor colors. Use a palette for best results:\n```bash\nffmpeg -i input.mp4 -vf \"fps=15,scale=480:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse\" output.gif\n```\n\n### 2. Audio Mixing (Background Music + Voice)\nMix background music at 30% volume with the main audio:\n```bash\nffmpeg -i voice.mp4 -i bgm.mp3 -filter_complex \"[1:a]volume=0.3[bg];[0:a][bg]amix=inputs=2:duration=first\" -c:v copy output.mp4\n```\n\n### 3. Video Stabilization\nTwo-pass process to fix shaky footage:\n```bash\n# Pass 1: Analyze\nffmpeg -i shaky.mp4 -vf vidstabdetect -f null -\n# Pass 2: Transform\nffmpeg -i shaky.mp4 -vf vidstabtransform,unsharp=5:5:0.8:3:3:0.4 output.mp4\n```\n\n### 4. Color Correction & Enhancement\nAdjust brightness, contrast, and saturation:\n```bash\n# brightness=0.05, contrast=1.1, saturation=1.2\nffmpeg -i input.mp4 -vf \"eq=brightness=0.05:contrast=1.1:saturation=1.2\" output.mp4\n```\n\n### 5. Automatic Thumbnail Sheet\nCreate a 3x3 grid of frames:\n```bash\nffmpeg -i input.mp4 -vf \"select='not(mod(n,100))',scale=320:-1,tile=3x3\" -frames:v 1 preview.png\n```\n\n### 6. Remove Silence from Audio\nAutomatically cut silent parts from the beginning and end:\n```bash\nffmpeg -i input.mp4 -af silenceremove=start_periods=1:start_silence=0.1:start_threshold=-50dB:stop_periods=1:stop_silence=0.1:stop_threshold=-50dB output.mp4\n```\n\n## Hardware Acceleration\n\n| Platform | Codec | Command |\n|----------|-------|---------|\n| NVIDIA (NVENC) | H.264 | `-c:v h264_nvenc` |\n| Intel (QSV) | H.264 | `-c:v h264_qsv` |\n| Apple (VideoToolbox) | H.265 | `-c:v hevc_videotoolbox` |\n\n## Constraints & Error Handling\n\n- **Stream Mapping**: Always use `-map` for complex files to ensure you get the right audio/subtitle tracks.\n- **Seeking**: Put `-ss` *before* `-i` for fast seeking (input seeking), or *after* `-i` for accurate seeking (output seeking).\n- **Format Support**: Ensure the output container (extension) supports the codecs you've chosen.\n\nFile v1.0.0:_meta.json\n\n{\n  \"ownerId\": \"kn70ca0wmrdy6qfp6a77m13c7s80ctn5\",\n  \"slug\": \"donson-intelligent-editing\",\n  \"version\": \"1.0.0\",\n  \"publishedAt\": 1770015595975\n}","readmeExcerpt":"Skill: Intelligent Editing Owner: DonsonAICenter Summary: Use when performing video/audio processing tasks including transcoding, filtering, streaming, metadata manipulation, or complex filtergraph operations with FFmpeg. Tags: latest:1.0.0 Version history: v1.0.0 | 2026-02-02T06:59:55.975Z | user Initial release – comprehensive FFmpeg and FFprobe command reference for video/audio processing. - Covers transcoding, fi","codeSnippets":[],"executableExamples":[{"language":"bash","snippet":"# Basic Transcoding (MP4 to MKV)\nffmpeg -i input.mp4 output.mkv\n\n# Change Video Codec (to H.265/HEVC)\nffmpeg -i input.mp4 -c:v libx265 -crf 28 -c:a copy output.mp4\n\n# Extract Audio (No Video)\nffmpeg -i input.mp4 -vn -c:a libmp3lame -q:a 2 output.mp3\n\n# Resize/Scale Video\nffmpeg -i input.mp4 -vf \"scale=1280:720\" output.mp4\n\n# Cut Video (Start at 10s, Duration 30s)\nffmpeg -i input.mp4 -ss 00:00:10 -t 00:00:30 -c copy output.mp4\n\n# Fast Precise Cut (Re-encoding only the cut points is complex, so standard re-encoding is safer for precision)\nffmpeg -ss 00:00:10 -i input.mp4 -to 00:00:40 -c:v libx264 -crf 23 -c:a aac output.mp4\n\n# Concatenate Files (using demuxer)\n# Create filelist.txt: file 'part1.mp4' \\n file 'part2.mp4'\nffmpeg -f concat -safe 0 -i filelist.txt -c copy output.mp4\n\n# Speed Up/Slow Down Video (2x speed)\nffmpeg -i input.mp4 -filter_complex \"[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]\" -map \"[v]\" -map \"[a]\" output.mp4"},{"language":"bash","snippet":"# Example: Adding a watermark at the bottom right\nffmpeg -i input.mp4 -i watermark.png -filter_complex \"overlay=main_w-overlay_w-10:main_h-overlay_h-10\" output.mp4\n\n# Example: Vertical Stack (2 videos)\nffmpeg -i top.mp4 -i bottom.mp4 -filter_complex \"vstack=inputs=2\" output.mp4\n\n# Example: Side-by-Side (2 videos)\nffmpeg -i left.mp4 -i right.mp4 -filter_complex \"hstack=inputs=2\" output.mp4\n\n# Example: Grid (4 videos 2x2)\nffmpeg -i v1.mp4 -i v2.mp4 -i v3.mp4 -i v4.mp4 -filter_complex \"[0:v][1:v]hstack=inputs=2[top];[2:v][3:v]hstack=inputs=2[bottom];[top][bottom]vstack=inputs=2\" output.mp4\n\n# Example: Fade Transition (Simple crossfade between two clips)\n# Requires manual offset calculation, using xfade is better\nffmpeg -i input1.mp4 -i input2.mp4 -filter_complex \"xfade=transition=fade:duration=1:offset=9\" output.mp4"},{"language":"bash","snippet":"ffmpeg -i input.mp4 -vf \"fps=15,scale=480:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse\" output.gif"},{"language":"bash","snippet":"ffmpeg -i voice.mp4 -i bgm.mp3 -filter_complex \"[1:a]volume=0.3[bg];[0:a][bg]amix=inputs=2:duration=first\" -c:v copy output.mp4"},{"language":"bash","snippet":"# Pass 1: Analyze\nffmpeg -i shaky.mp4 -vf vidstabdetect -f null -\n# Pass 2: Transform\nffmpeg -i shaky.mp4 -vf vidstabtransform,unsharp=5:5:0.8:3:3:0.4 output.mp4"},{"language":"bash","snippet":"# brightness=0.05, contrast=1.1, saturation=1.2\nffmpeg -i input.mp4 -vf \"eq=brightness=0.05:contrast=1.1:saturation=1.2\" output.mp4"}],"parameters":null,"dependencies":[],"permissions":[],"extractedFiles":[{"path":"SKILL.md","content":"---\nname: donson-intelligent-editing\nversion: 1.0.0\ndescription: Use when performing video/audio processing tasks including transcoding, filtering, streaming, metadata manipulation, or complex filtergraph operations with FFmpeg.\ntriggers:\n  - ffmpeg\n  - ffprobe\n  - video processing\n  - audio conversion\n  - codec\n  - transcoding\n  - filter_complex\n  - h264\n  - h265\n  - mp4\n  - mkv\n  - hardware acceleration\nrole: specialist\nscope: implementation\noutput-format: shell-command\n---\n\n# Donson Intelligent Editing\n\nComprehensive guide for professional video and audio manipulation using FFmpeg and FFprobe.\n\n## Core Concepts\n\nFFmpeg is the leading multimedia framework, able to **decode, encode, transcode, mux, demux, stream, filter and play** almost anything that humans and machines have created. It is a command-line tool that processes streams through a complex pipeline of demuxers, decoders, filters, encoders, and muxers.\n\n## Common Operations\n\n```bash\n# Basic Transcoding (MP4 to MKV)\nffmpeg -i input.mp4 output.mkv\n\n# Change Video Codec (to H.265/HEVC)\nffmpeg -i input.mp4 -c:v libx265 -crf 28 -c:a copy output.mp4\n\n# Extract Audio (No Video)\nffmpeg -i input.mp4 -vn -c:a libmp3lame -q:a 2 output.mp3\n\n# Resize/Scale Video\nffmpeg -i input.mp4 -vf \"scale=1280:720\" output.mp4\n\n# Cut Video (Start at 10s, Duration 30s)\nffmpeg -i input.mp4 -ss 00:00:10 -t 00:00:30 -c copy output.mp4\n\n# Fast Precise Cut (Re-encoding only the cut points is complex, so standard re-encoding is safer for precision)\nffmpeg -ss 00:00:10 -i input.mp4 -to 00:00:40 -c:v libx264 -crf 23 -c:a aac output.mp4\n\n# Concatenate Files (using demuxer)\n# Create filelist.txt: file 'part1.mp4' \\n file 'part2.mp4'\nffmpeg -f concat -safe 0 -i filelist.txt -c copy output.mp4\n\n# Speed Up/Slow Down Video (2x speed)\nffmpeg -i input.mp4 -filter_complex \"[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]\" -map \"[v]\" -map \"[a]\" output.mp4\n```\n\n---\n\n## Processing Categories & When to Use\n\n### Codecs & Quality\n| Option | Use When |\n|-----------|----------|\n| `-c:v libx264` | Standard H.264 encoding (best compatibility) |\n| `-c:v libx265` | H.265/HEVC encoding (best compression/quality) |\n| `-crf [0-51]` | Constant Rate Factor (lower is higher quality, 18-28 recommended) |\n| `-preset` | Encoding speed vs compression (ultrafast, medium, veryslow) |\n| `-c:a copy` | Pass-through audio without re-encoding (saves time/quality) |\n\n### Filters & Manipulation\n| Filter | Use When |\n|-----------|----------|\n| `scale` | Changing resolution (e.g., `scale=1920:-1` for 1080p width) |\n| `crop` | Removing edges (e.g., `crop=w:h:x:y`) |\n| `transpose` | Rotating video (1=90deg CW, 2=90deg CCW) |\n| `fps` | Changing frame rate (e.g., `fps=30`) |\n| `drawtext` | Adding text overlays/watermarks |\n| `overlay` | Picture-in-picture or adding image watermarks |\n| `fade` | Adding fade-in/out effects (e.g., `fade=in:0:30` for first 30 frames) |\n| `volume` | Adjusting audio levels (e.g., `volume=1.5` for 150% volume) |\n| `setpts` | Changing video speed "},{"path":"_meta.json","content":"{\n  \"ownerId\": \"kn70ca0wmrdy6qfp6a77m13c7s80ctn5\",\n  \"slug\": \"donson-intelligent-editing\",\n  \"version\": \"1.0.0\",\n  \"publishedAt\": 1770015595975\n}"}],"languages":[],"docsSourceLabel":"CLAWHUB","editorialOverview":"Use when performing video/audio processing tasks including transcoding, filtering, streaming, metadata manipulation, or complex filtergraph operations with FFmpeg. Skill: Intelligent Editing Owner: DonsonAICenter Summary: Use when performing video/audio processing tasks including transcoding, filtering, streaming, metadata manipulation, or complex filtergraph operations with FFmpeg. 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