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Video Edit
Edit videos locally by running ffmpeg/ffprobe directly. No wrapper scripts needed.
Prerequisites
Install ffmpeg (includes ffprobe):
# macOS
brew install ffmpeg
# Ubuntu/Debian
sudo apt update && sudo apt install -y ffmpeg
# Verify
ffmpeg -version && ffprobe -version
Quick Reference
Get video info
ffprobe -v quiet -print_format json -show_format -show_streams video.mp4
Trim
ffmpeg -y -ss 00:00:30 -to 00:01:45 -i video.mp4 -c copy trimmed.mp4
Concatenate clips
# 1. Create a file list
printf "file '%s'\n" clip1.mp4 clip2.mp4 clip3.mp4 > list.txt
# 2. Concat with stream copy
ffmpeg -y -f concat -safe 0 -i list.txt -c copy joined.mp4
Resize for platform
ffmpeg -y -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 tiktok.mp4
Change speed
# 2x faster
ffmpeg -y -i video.mp4 -filter:v "setpts=0.5*PTS" -filter:a "atempo=2.0" fast.mp4
# 0.5x (slow motion)
ffmpeg -y -i video.mp4 -filter:v "setpts=2.0*PTS" -filter:a "atempo=0.5" slow.mp4
Extract audio
ffmpeg -y -i video.mp4 -vn -acodec libmp3lame audio.mp3
Replace audio
ffmpeg -y -i video.mp4 -i audio.mp3 -c:v copy -map 0:v:0 -map 1:a:0 -shortest output.mp4
Compress
ffmpeg -y -i video.mp4 -crf 23 -preset medium -c:a copy compressed.mp4
Convert format
ffmpeg -y -i video.mov output.mp4
Add image overlay
# Logo in top-right corner
ffmpeg -y -i video.mp4 -i logo.png \
-filter_complex "overlay=W-w-10:10" -c:a copy watermarked.mp4
Platform Presets
| Platform | Resolution | Scale + pad filter |
|---|
| TikTok | 1080 x 1920 | scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2:black |
| YouTube | 1920 x 1080 | scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2:black |
| Instagram | 1080 x 1350 | scale=1080:1350:force_original_aspect_ratio=decrease,pad=1080:1350:(ow-iw)/2:(oh-ih)/2:black |
| Square | 1080 x 1080 | scale=1080:1080:force_original_aspect_ratio=decrease,pad=1080:1080:(ow-iw)/2:(oh-ih)/2:black |
Use the filter with: ffmpeg -y -i input.mp4 -vf "<filter>" -c:a copy output.mp4
Tips
- Always use
-y to overwrite output without prompting.
- Use
-c copy when you only need to cut/join (no re-encoding, very fast).
- Lower CRF = better quality, larger file. Range 18-28 is typical; 23 is the default.
- For detailed recipes and flag explanations, see
references/operations.md.
Weekly Installs
286
Repository
heygen-com/skills
GitHub Stars
91
First Seen
8 days ago
Security Audits
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Installed on
claude-code258
cursor58
cline57
gemini-cli57
codex57
kimi-cli57
