workspace/.claude/skills/remotion-best-practices/rules/ffmpeg.md

name, description, metadata

name	description	metadata
ffmpeg	Using FFmpeg and FFprobe in Remotion	tags ffmpeg, ffprobe, video, trimming

FFmpeg in Remotion

ffmpeg and ffprobe do not need to be installed. They are available via the npx remotion ffmpeg and npx remotion ffprobe:

npx remotion ffmpeg -i input.mp4 output.mp3
npx remotion ffprobe input.mp4

Trimming videos

You have 2 options for trimming videos:

1. Preferred: Use the trimBefore and trimAfter props of the <Video> component. This is non-destructive, requires no re-encoding, and you can change the trim at any time.

import {Video} from '@remotion/media';

<Video src={staticFile('video.mp4')} trimBefore={5 * fps} trimAfter={10 * fps} />;

2. Use the FFmpeg command line. You MUST re-encode the video to avoid frozen frames at the start of the video. Only use this if you need a standalone trimmed file (e.g. for upload or external use).

# Re-encodes from the exact frame
npx remotion ffmpeg -ss 00:00:05 -i public/input.mp4 -to 00:00:10 -c:v libx264 -c:a aac public/output.mp4