media-editor

name	media-editor
description	Transcript-driven video post-production — set up the toolchain, transcribe with whisper.cpp, and cut/speed/export with ffmpeg. Load the matching reference for detailed commands.

Media editing

Reusable procedures for transcript-driven video editing. The end-to-end workflow is: inspect → set up tools → transcribe → plan from the transcript → cut/speed → export → re-transcribe → verify.

Load the reference for the step you are on:

• Toolchain setup — install and verify ffmpeg, ffprobe, whisper.cpp, and a whisper model (Homebrew, Nix, or apt). See references/setup-tools.md.
• Transcription — extract 16 kHz mono audio and produce a timestamped SRT/JSON transcript with whisper.cpp. See references/audio-transcribe.md.
• Video editing & export — inspect with ffprobe; cut, speed-adjust (setpts/atempo), concatenate, and export a publication-ready H.264 MP4. See references/video-editing.md.

Core discipline (applies to every step)

• Never overwrite source recordings — write derived files (WAV, SRT, clips, finals) alongside them or into output/, keeping the source basename.
• Transcription and long renders take minutes — run whisper-cli and long ffmpeg jobs as background tasks and check results on completion.
• The transcript is the source of truth for edit decisions — cite timestamps when proposing cuts, and show the edit plan (segments, actions, estimated output length) before rendering the final export.
• Prefer stream copy (-c copy) for lossless cuts when keyframe alignment allows; re-encode only when a frame-accurate cut or a filter requires it.