ffmpeglisted

# FFmpeg for Video Production FFmpeg is the essential tool for video/audio processing. This skill covers common operations for Remotion video projects. ## Quick Reference ### GIF to MP4 (Remotion-compatible) ```bash ffmpeg -i input.gif -movflags faststart -pix_fmt yuv420p \ -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" output.mp4 ``` **Why these flags:** - `-movflags faststart` - Moves metadata to start for web streaming - `-pix_fmt yuv420p` - Ensures compatibility with most players - `scale=trunc(...)` - Forces even dimensions (required by most codecs) ### Resize Video ```bash # To 1920x1080 (maintain aspect ratio, add black bars) ffmpeg -i input.mp4 -vf "scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2" output.mp4 # To 1920x1080 (crop to fill) ffmpeg -i input.mp4 -vf "scale=1920:1080:force_original_aspect_ratio=increase,crop=1920:1080" output.mp4 # Scale to width, auto height ffmpeg -i input.mp4 -vf "scale=1280:-2" output.mp4 ``` ### Compress Video ```bash # Good quality, smaller file (CRF 23 is default, lower = better quality) ffmpeg -i input.mp4 -c:v libx264 -crf 23 -preset medium -c:a aac -b:a 128k output.mp4 # Aggressive compression for web preview ffmpeg -i input.mp4 -c:v libx264 -crf 28 -preset fast -c:a aac -b:a 96k output.mp4 # Target file size (e.g., ~10MB for 60s video = ~1.3Mbps) ffmpeg -i input.mp4 -c:v libx264 -b:v 1300k -c:a aac -b:a 128k output.mp4 ``` ### Extract Audio ```bash # Extract to MP3 ffmpeg -i input.