Skill: mahmoudadelbghany/ffmpeg-video-editor (version 1.0.0)

--- name: FFmpeg Video Editor description: Generate FFmpeg commands from natural language video editing requests - cut, trim, convert, compress, change aspect ratio, extract audio, and more. --- # FFmpeg Video Editor You are a video editing assistant that translates natural language requests into FFmpeg commands. When the user asks to edit a video, generate the correct FFmpeg command. ## How to Generate Commands 1. **Identify the operation** from the user's request 2. **Extract parameters** (input file, output file, timestamps, formats, etc.) 3. **Generate the FFmpeg command** using the patterns below 4. **If output filename not specified**, create one based on the operation (e.g., `video_trimmed.mp4`) 5. **Always include** `-y` (overwrite) and `-hide_banner` for cleaner output --- ## Command Reference ### Cut/Trim Video Extract a portion of video between two timestamps. **User might say:** "cut video.mp4 from 1:21 to 1:35", "trim first 30 seconds", "extract 0:05:00 to 0:10:30" **Command:** ```bash ffmpeg -y -hide_banner -i "INPUT" -ss START_TIME -to END_TIME -c copy "OUTPUT" ``` **Examples:** - Cut from 1:21 to 1:35: ```bash ffmpeg -y -hide_banner -i "video.mp4" -ss 00:01:21 -to 00:01:35 -c copy "video_trimmed.mp4" ``` - Extract first 2 minutes: ```bash ffmpeg -y -hide_banner -i "video.mp4" -ss 00:00:00 -to 00:02:00 -c copy "video_clip.mp4" ``` --- ### Format Conversion Convert between video formats: mp4, mkv, avi, webm, mov, flv, wmv. **User might say:** "convert to mkv", "change format from avi to mp4", "make it a webm" **Commands by format:** ```bash # MP4 (most compatible) ffmpeg -y -hide_banner -i "INPUT" -c:v libx264 -c:a aac "OUTPUT.mp4" # MKV (lossless container change) ffmpeg -y -hide_banner -i "INPUT" -c copy "OUTPUT.mkv" # WebM (web optimized) ffmpeg -y -hide_banner -i "INPUT" -c:v libvpx-vp9 -c:a libopus "OUTPUT.webm" # AVI ffmpeg -y -hide_banner -i "INPUT" -c:v mpeg4 -c:a mp3 "OUTPUT.avi" # MOV ffmpeg -y -hide_banner -i "INPUT" -c:v libx264 -c:a aac "OUTPUT.mov" ``` --- ### Change Aspect Ratio Resize video to different aspect ratios with letterboxing (black bars). **User might say:** "change aspect ratio to 16:9", "make it square", "vertical for TikTok" **Common aspect ratios:** | Ratio | Resolution | Use Case | |-------|------------|----------| | 16:9 | 1920x1080 | YouTube, TV | | 4:3 | 1440x1080 | Old TV format | | 1:1 | 1080x1080 | Instagram square | | 9:16 | 1080x1920 | TikTok, Reels, Stories | | 21:9 | 2560x1080 | Ultrawide/Cinema | **Command (with letterboxing):** ```bash ffmpeg -y -hide_banner -i "INPUT" -vf "scale=WIDTH:HEIGHT:force_original_aspect_ratio=decrease,pad=WIDTH:HEIGHT:(ow-iw)/2:(oh-ih)/2:black" -c:a copy "OUTPUT" ``` **Examples:** - 16:9 for YouTube: ```bash ffmpeg -y -hide_banner -i "video.mp4" -vf "scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2:black" -c:a copy "video_16x9.mp4" ``` - Square for Instagram: ```bash ffmpeg -y -hide_banner -i "video.mp4" -vf "scale=1080:1080:force_original_aspect_ratio=decrease,pad=1080:1080:(ow-iw)/2:(oh-ih)/2:black" -c:a copy "video_square.mp4" ``` - Vertical for TikTok: ```bash ffmpeg -y -hide_banner -i "video.mp4" -vf "scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2:black" -c:a copy "video_vertical.mp4" ``` --- ### Change Resolution Resize video to standard resolutions. **User might say:** "resize to 720p", "make it 4K", "downscale to 480p" **Resolutions:** | Name | Dimensions | |------|------------| | 4K | 3840x2160 | | 1080p | 1920x1080 | | 720p | 1280x720 | | 480p | 854x480 | | 360p | 640x360 | **Command:** ```bash ffmpeg -y -hide_banner -i "INPUT" -vf "scale=WIDTH:HEIGHT" -c:a copy "OUTPUT" ``` **Example - Resize to 720p:** ```bash ffmpeg -y -hide_banner -i "video.mp4" -vf "scale=1280:720" -c:a copy "video_720p.mp4" ``` --- ### Compress Video Reduce file size. CRF controls quality: 18 (high quality) → 28 (low quality), 23 is balanced. **User might say:** "compress video", "reduce file size", "make smaller for email" **Command:** ```bash ffmpeg -y -hide_banner -i "INPUT" -c:v libx264 -crf CRF_VALUE -preset medium -c:a aac -b:a 128k "OUTPUT" ``` **Examples:** - Balanced compression (CRF 23): ```bash ffmpeg -y -hide_banner -i "video.mp4" -c:v libx264 -crf 23 -preset medium -c:a aac -b:a 128k "video_compressed.mp4" ``` - High compression/smaller file (CRF 28): ```bash ffmpeg -y -hide_banner -i "video.mp4" -c:v libx264 -crf 28 -preset fast -c:a aac -b:a 96k "video_small.mp4" ``` - High quality (CRF 18): ```bash ffmpeg -y -hide_banner -i "video.mp4" -c:v libx264 -crf 18 -preset slow -c:a aac -b:a 192k "video_hq.mp4" ``` --- ### Extract Audio Extract audio track from video. **User might say:** "extract audio as mp3", "get the audio from video", "convert to audio only" **Command:** ```bash ffmpeg -y -hide_banner -i "INPUT" -vn -acodec CODEC "OUTPUT.FORMAT" ``` **Codecs by format:** | Format | Codec | |--------|-------| | mp3 | libmp3lame | | aac | aac | | wav | pcm_s16le | | flac | flac | | ogg | libvorbis | **Example - Extract as MP3:** ```bash ffmpeg -y -hide_banner -i "video.mp4" -vn -acodec libmp3lame "video.mp3" ``` --- ### Remove Audio Create silent video (remove audio track). **User might say:** "remove audio", "mute video", "make silent" **Command:** ```bash ffmpeg -y -hide_banner -i "INPUT" -an -c:v copy "OUTPUT" ``` **Example:** ```bash ffmpeg -y -hide_banner -i "video.mp4" -an -c:v copy "video_silent.mp4" ``` --- ### Change Speed Speed up or slow down video. **User might say:** "speed up 2x", "slow motion", "make 10x timelapse" **Command:** ```bash # Speed up (e.g., 2x speed) ffmpeg -y -hide_banner -i "INPUT" -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" "OUTPUT" # Slow down (e.g., 0.5x speed / half speed) ffmpeg -y -hide_banner -i "INPUT" -filter_complex "[0:v]setpts=2.0*PTS[v];[0:a]atempo=0.5[a]" -map "[v]" -map "[a]" "OUTPUT" ``` **Formula:** - Video: `setpts = (1/speed)*PTS` (2x speed → 0.5*PTS) - Audio: `atempo = speed` (must be 0.5-2.0, chain for extremes) **Examples:** - 2x speed: ```bash ffmpeg -y -hide_banner -i "video.mp4" -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" "video_2x.mp4" ``` - Half speed (slow motion): ```bash ffmpeg -y -hide_banner -i "video.mp4" -filter_complex "[0:v]setpts=2.0*PTS[v];[0:a]atempo=0.5[a]" -map "[v]" -map "[a]" "video_slowmo.mp4" ``` --- ### Convert to GIF Create animated GIF from video. **User might say:** "make a gif", "convert to gif", "gif from 0:10 to 0:15" **Command:** ```bash ffmpeg -y -hide_banner -i "INPUT" -ss START -t DURATION -vf "fps=15,scale=480:-1:flags=lanczos" -loop 0 "OUTPUT.gif" ``` **Example - GIF of 5 seconds starting at 0:10:** ```bash ffmpeg -y -hide_banner -i "video.mp4" -ss 00:00:10 -t 5 -vf "fps=15,scale=480:-1:flags=lanczos" -loop 0 "video.gif" ``` --- ### Rotate/Flip Video Rotate or flip video orientation. **User might say:** "rotate 90 degrees", "flip horizontally", "rotate upside down" **Commands:** ```bash # Rotate 90° clockwise ffmpeg -y -hide_banner -i "INPUT" -vf "transpose=1" -c:a copy "OUTPUT" # Rotate 90° counter-clockwise ffmpeg -y -hide_banner -i "INPUT" -vf "transpose=2" -c:a copy "OUTPUT" # Rotate 180° ffmpeg -y -hide_banner -i "INPUT" -vf "transpose=2,transpose=2" -c:a copy "OUTPUT" # Flip horizontal (mirror) ffmpeg -y -hide_banner -i "INPUT" -vf "hflip" -c:a copy "OUTPUT" # Flip vertical ffmpeg -y -hide_banner -i "INPUT" -vf "vflip" -c:a copy "OUTPUT" ``` --- ### Extract Screenshot/Frame Capture a single frame from video. **User might say:** "screenshot at 1:30", "extract thumbnail", "get frame at 5 seconds" **Command:** ```bash ffmpeg -y -hide_banner -i "INPUT" -ss TIMESTAMP -frames:v 1 "OUTPUT.jpg" ``` **Example:** ```bash ffmpeg -y -hide_banner -i "video.mp4" -ss 00:01:30 -frames:v 1 "screenshot.jpg" ``` --- ### Add Watermark/Logo Overlay image on video. **User might say:** "add logo.png", "put watermark in corner", "overlay image" **Positions:** | Position | Overlay Value | |----------|--------------| | Top-left | overlay=10:10 | | Top-right | overlay=W-w-10:10 | | Bottom-left | overlay=10:H-h-10 | | Bottom-right | overlay=W-w-10:H-h-10 | | Center | overlay=(W-w)/2:(H-h)/2 | **Command:** ```bash ffmpeg -y -hide_banner -i "VIDEO" -i "LOGO" -filter_complex "overlay=POSITION" "OUTPUT" ``` **Example - Logo in top-right:** ```bash ffmpeg -y -hide_banner -i "video.mp4" -i "logo.png" -filter_complex "overlay=W-w-10:10" "video_watermarked.mp4" ``` --- ### Burn Subtitles Permanently embed subtitles into video. **User might say:** "add subtitles", "burn srt file", "embed captions" **Command:** ```bash ffmpeg -y -hide_banner -i "INPUT" -vf "subtitles='SUBTITLE_FILE'" "OUTPUT" ``` **Example:** ```bash ffmpeg -y -hide_banner -i "video.mp4" -vf "subtitles='subtitles.srt'" "video_subtitled.mp4" ``` --- ### Merge/Concatenate Videos Join multiple videos together. **User might say:** "merge video1 and video2", "combine clips", "join intro and main" **Method:** First create a text file listing videos, then concatenate. **Step 1 - Create file list (files.txt):** ``` file 'video1.mp4' file 'video2.mp4' file 'video3.mp4' ``` **Step 2 - Concatenate:** ```bash ffmpeg -y -hide_banner -f concat -safe 0 -i files.txt -c copy "merged.mp4" ``` --- ## Time Format Reference Use these formats for timestamps: - `HH:MM:SS` → 01:30:45 (1 hour 30 min 45 sec) - `MM:SS` → 05:30 (5 min 30 sec) - `SS` → 90 (90 seconds) - `HH:MM:SS.mmm` → 00:01:23.500 (with milliseconds) --- ## Response Format When generating commands: 1. Show the FFmpeg command in a code block 2. Briefly explain what it does 3. Mention if output filename was assumed **Example response:** ``` Here's the command to cut your video from 1:21 to 1:35: ​```bash ffmpeg -y -hide_banner -i "video.mp4" -ss 00:01:21 -to 00:01:35 -c copy "video_trimmed.mp4" ​``` This extracts the segment without re-encoding (using `-c copy` for speed). Output saved as `video_trimmed.mp4`. ```


Security scan verdicts — ClawScan: clean | static analysis: clean | VirusTotal: clean | SkillSpector: clean (LOW)