Stream Clip Kit

Turn one source video into up to three captioned vertical clips. Choose the moments yourself and keep the original audio.

What to send

• One MP4 containing audio
• A UTF-8 SRT file timed to the original video
• One to three start/end time ranges, each 1–60 seconds

Example: 00:00:00.750–00:00:10.750 — Start with the payoff.

What you get

• Up to three 720 × 1280 MP4s with captions burned in
• A matching SRT per clip and a list of source timestamps
• Full-frame fit by default, with optional center crop

This workflow uses existing video, audio, captions, and time ranges supplied by the user.

Featured example — Turn One Stream Into Three Captioned Shorts

User

I’ve attached source.mp4 and its matching source.srt. Please make three vertical clips from these moments:

1. 00:00:00.750–00:00:10.750 — Start with the payoff
2. 00:00:11.750–00:00:21.750 — One idea per clip
3. 00:00:22.750–00:00:32.750 — End on a clean beat

Keep the full frame and original audio, and burn the captions into each video.

Stream Clip Kit — Example response

Your three 10-second vertical clips are ready. Each is a 720 × 1280 MP4 with the original audio, burned-in captions, and a matching SRT file.

1. Start with the payoff · clip_01.mp4 + clip_01.srt
2. One idea per clip · clip_02.mp4 + clip_02.srt
3. End on a clean beat · clip_03.mp4 + clip_03.srt

clips.json records the original time range for each clip.