Going from vertical to horizontal is the opposite — and often harder — problem than the reverse: there's usually no extra picture information on the left and right to fill the wider frame, so the agent has to decide between cropping tighter vertically, adding padding/blur on the sides, or a mix.
Be explicit about which approach you want when you ask, since the two produce very different-looking results.
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Agent-driven EDL render via the Versely editor pipeline (POST /features/editor-render). Stitch, trim, speed-change, caption, overlay, and mix user media (workspace/generation HTTPS URLs) into ONE final video. Prefer this over chaining cut_video + attach_audio + add_*_captions when the user wants a multi-clip assembly in a single step. Billing: preview:true is free 480p (per-user cooldown); final export (preview:false, default) charges the normal single editor_export price. Prefer preview:true while the user is iterating; only final-render after confirmation. Clips must be HTTPS URLs (file:// and other schemes rejected). Returns { video_url, credits_charged, preview_notes } or a 402-style insufficient-credits error.
What to tell the agent
Versely's agent maps this plain-English request directly onto edit_video. You don't need to know the parameter names — just describe what you want.
“Convert this vertical video to 16:9 widescreen for YouTube — use blurred padding on the sides rather than cropping.”
How it works
1. Supply the vertical source
Any 9:16 or portrait-oriented HTTPS video URL.
2. Request 16:9
Tell the agent to reformat to 16:9 widescreen.
3. Choose the fill strategy
Say whether you want padded/blurred sides (keeps the whole original frame visible) or a tighter crop (fills the frame but loses top/bottom content).
4. Preview and export
Check the free 480p preview before committing to the final render.
What it costs
Free 480p preview (preview:true), then standard editor_export pricing for the final render.
The formula behind that number: What does editing a video cost if I keep changing it? — charges per finished export, so iteration is free and the count is the whole bill.
Limits & things to know
- There's no source footage to genuinely fill the newly wide sides — the result is either padded/blurred bars or a crop that loses vertical content, not a true wide reshoot.
- Heavily vertical framing (e.g. a phone held close to a face) crops especially aggressively when forced into 16:9.
Who uses this
- Repurposing a TikTok/Reel for a YouTube upload
- Turning phone-shot footage into a pitch deck video
- Prepping vertical UGC for a 16:9 ad placement
Frequently asked questions
Will it look stretched or cropped?+
Neither by default, but there's no extra footage to fill the new width — you'll get either blurred/padded sides that preserve the whole original frame, or a tighter crop that fills the frame but loses some top/bottom content. Tell the agent which you prefer.
Is this a true reshoot in widescreen?+
No — it's a reframe of existing vertical footage, not new camera coverage, so it can't recover picture information that was never captured on the sides.
Related Versely tools
Related editing jobs
Convert a Vertical Video to Horizontal inside Versely
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