Editor — Post Production

Run only the applicable steps. Preserve a pre-edit copy and reuse every successful Vidjutsu result.

1. Concat

Join passed clips with hard cuts:

ffmpeg -f concat -safe 0 -i concat.txt -c copy concat.mp4

If the final video should be silent, strip audio explicitly. Otherwise preserve the Kling source soundtrack.

2. Normalize speech

For spoken content, apply two-pass FFmpeg loudnorm at -16 LUFS. Verify the result through Vidjutsu:

vidjutsu transcribe --mediaUrl "$PUBLIC_VIDEO_URL"

Vidjutsu does not replace audio tracks or voices. Any separately authorized audio replacement is an external edit and must be labeled as such; it is not part of the tenant-scoped generation flow.

3. Overlay

vidjutsu overlay --videoUrl "$VIDEO_URL" --text "$OVERLAY_TEXT" --position bottom

The synchronous response contains {id,resultUrl}. Use resultUrl downstream. Overlay is limited to 50 requests/day and is included in the subscription.

4. Captions

Vidjutsu does not render animated captions. If the user requests them, run the external /editor-captions ZapCap workflow after overlay and disclose its separate credential and billing.

5. Optional music

Vidjutsu does not generate music. Use only a user-supplied or separately authorized external music file, then mix it locally. Do not invent a Vidjutsu route or embed upstream-task polling in this skill.

6. Edit and resize

• Trim dead air at the start and end.
• Shorten silence gaps only when speech remains natural.
• Mute timestamped artifacts.
• Scale and pad to 1080x1920 only when the destination requires it.

ffmpeg -i output.mp4 -vf "scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2:black" -c:a copy final.mp4

7. Upload and verify

vidjutsu upload final.mp4
vidjutsu watch --mediaUrl "$FINAL_CDN_URL" --prompt 'Return only JSON with pass:boolean and issues:string[]. Verify one continuous identity, readable requested text, clean framing, intact audio, and no severe artifacts.'

The upload response contains {assetId,url,key,size}. Watch output is nested in response. Report the final CDN URL, size, duration, Kling model, QA result, and applied post-production steps.