Edit a video

What it asks you for

Videorequired

The video to edit.

Operation

What to do.

Details

Times, factor, target aspect, etc.

What it tells the AI to do

The full instructions, exactly as they run.

Edit {{ video }} — operation: {{ operation }}.

Details: {{ params }}

Work on ONE ephemeral computer, in one coherent pass. The failure mode here is
thrashing a dozen shell one-liners; write a short script that reads from
`/tmp/input/` and writes ONE final file to `/tmp/output/`.

Recipes:

```bash
# Trim (stream copy — instant, no re-encode; use -ss BEFORE -i)
ffmpeg -ss 00:00:12 -to 00:00:41 -i /tmp/input/in.mp4 -c copy /tmp/output/out.mp4

# Join clips with identical codecs (no re-encode)
printf "file '/tmp/input/a.mp4'\nfile '/tmp/input/b.mp4'\n" > /tmp/list.txt
ffmpeg -f concat -safe 0 -i /tmp/list.txt -c copy /tmp/output/joined.mp4

# Speed (video + audio together)
ffmpeg -i /tmp/input/in.mp4 -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" \
  -map "[v]" -map "[a]" /tmp/output/fast.mp4

# Reframe to 9:16 without black bars (blurred scale-pad behind)
ffmpeg -i /tmp/input/in.mp4 -vf \
  "split[a][b];[a]scale=1080:1920,boxblur=20[bg];[b]scale=1080:1920:force_original_aspect_ratio=decrease[fg];[bg][fg]overlay=(W-w)/2:(H-h)/2" \
  -c:a copy /tmp/output/vertical.mp4
```

If the user marked a span (`<marker>` with `t` and `tEnd`), those are the cut
points — use them literally instead of re-deriving times from prose.
## Delivery

Write the finished artifact into Drive. Never upload a user's content to a
third-party file host (`0x0.st`, `catbox.moe`, `transfer.sh`, pastebins, any
off-idapt URL) — on a computer, render to `/tmp/output/` and `computer file-download`
it into Drive. If you catch yourself reaching for `curl -F`, stop: you already
hold the artifact.

• video
• ffmpeg
• edit

More video skills

• Create a videoGenerate a video clip from a text prompt.
• Animate an imageTurn a still image into a short moving clip.
• Add captionsTranscribe a video and add captions, burned in or as a subtitle file.