How to Create Vertical Social Clips from a Long Video in Descript

Turn a long horizontal recording into punchy vertical clips with reframing and captions for TikTok, Reels, and Shorts.

8 minIntermediate

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A single long podcast or talk is a goldmine of short clips. Descript lets you find the best moments in the transcript, reframe them to vertical, and add captions, all without re-editing from scratch. This guide walks through producing one share-ready vertical clip.

What you need

A Descript project with a long horizontal (16:9) video
A target platform in mind (TikTok, Reels, or Shorts, all 9:16)
An eye for a strong 30 to 60 second moment

Step 1: Find a strong moment in the transcript

Skim the transcript for a self-contained idea, story, or hot take that works without setup. Highlight that passage. A good clip usually runs 20 to 60 seconds and ends on a punchy line.

Step 2: Make a new clip from the selection

With the passage selected, create a new composition or duplicate the project so your edits do not touch the main video. You now have a short timeline containing just that moment.

Descript - Selection to clip

You

The biggest mistake new editors make is starting on the timeline...

Agent

Selection: 00:23:10 -> 00:23:52 (42s). Create clip from selection?

A 42 second highlight pulled from a 58 minute episode.

Step 3: Switch the aspect ratio to 9:16

Open the layout or scene settings and change the aspect ratio to 9:16 vertical. The horizontal footage now sits in a vertical frame, so you need to reposition it.

Use auto reframe to keep the speaker centered

Descript can track and reframe so the speaker stays in the middle of the vertical frame as they move. Turn this on instead of manually keyframing the position, and it follows the action for you.

Step 4: Add big captions

Vertical social clips live and die by captions because most people watch with sound off. Add word-by-word captions, bump the font size up, and use a bold style with a background so text is legible on a phone.

Step 5: Export at 1080x1920

Export as MP4 at 1080 by 1920, which is the standard for vertical social. Keep the bitrate high so it survives the platform's re-compression. Upload natively to each platform for the best reach.

Descript - Vertical reframe

Layout

------------------------------------

Aspect ratio: [ 9:16 vertical v ]

Reframe: (x) Auto-track speaker

( ) Manual position

+------------+ speaker kept centered

| [o_o] | as they move L <-> R

+------------+

Horizontal footage reframed to 9:16 with auto-tracking on the speaker.

Export - vertical clip

Format: MP4 (H.264)

Resolution: 1080 x 1920 (9:16)

Frame rate: 30 fps

Captions: burned in (word-by-word)

Exported clip-01-vertical.mp4

Result: a 42 second vertical clip with the speaker auto-tracked and bold captions, pulled from an hour-long episode in roughly ten minutes, ready to post to three platforms.

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