Avatar video aspect ratio for a Shorts series: 9:16, 1:1 or 3:4?
Avatar 1.0 renders 1:1, 3:4, 9:16, 4:3 and 16:9 (default 9:16) at 720p. YouTube Shorts series accept portrait or square only, so 4:3 and 16:9 are out for them.
Sume Avatar 1.0 by API: reusable avatars, talking video from a script, multi-scene and two-speaker videos, previews, B-roll, and Face Swap (Beta).
Start with: Introducing Sume Avatar 1.0
Avatar 1.0 renders 1:1, 3:4, 9:16, 4:3 and 16:9 (default 9:16) at 720p. YouTube Shorts series accept portrait or square only, so 4:3 and 16:9 are out for them.
Create an Avatar video preview, review the first-frame stills, regenerate if needed, then call generate-video. Quality can change at the final step.
Avatar 1.0 renders one avatar per final video, so a two-character scene is two jobs. A 30-second exchange costs $7.35 at plus and $16.50 at max.
Griffin-Lite is full-duplex and a research preview for select testers. Check each claim against what you can integrate today.
Adding product_image to an Avatar 1.0 UGC ad adds $0.010, $0.013 or $0.030 per second at standard, plus and max. Thirty 15-second plus ads cost $116.10.
Creating an Avatar 1.0 costs a flat $0.95. Make the lead from a prompt, profile or photo, then reuse the handle for every episode.

A ChatGPT Image 2.5 portrait plus a 10-second VEED Fabric 1.0 talking clip costs about $1.89 on Sume at 720p. What to send and what Fabric needs.
Pick the Sume avatar route by what you already have: a clip with a person (face swap), a motion video (Kling motion control) or a voice line (H3 Max lip sync).
Create the presenter once, then pass avatar_handle to H3 Max lip sync for every clip. Same face each time, no re-upload, one Idempotency-Key per line.

Griffin-Lite is a closed Tavus preview. Until you get in, Sume ships rendered avatar clips, lip sync and motion control for talking-head video.

YouTube began rolling out Shorts series on 2026-09-23. A repeatable weekly pipeline for presenter episodes: one avatar, draft at standard, final at max.
In Pipecat, HeyGen LiveAvatar session length depends on your subscription tier. On Sume the length rule is fixed: 4 to 60 seconds per job, priced per second.
Pipecat's Tavus service speaks your agent's TTS live over WebRTC. A Sume avatar job is a 4 to 60 second recorded MP4. How to pick, by what the viewer does.
Pipecat's Tavus service reports TTFB from TTSStartedFrame and BotStartedSpeakingFrame. A Sume avatar job has no first byte to time: measure submit to completed.
Simli in Pipecat caps a live session with max_session_length and max_idle_time. Sume has no session: an avatar job is a 4 to 60 second file.

Tavus asks for two minutes of 1080p video and written consent. Sume Avatar 1.0 starts from a prompt, traits or one photo URL. The inputs compared, dated.
Tavus says an AI copy of a person is not a digital twin. Four system types in one table, and where a Sume Avatar 1.0 handle sits among them.
A final avatar video holds one avatar, so an interview needs a host clip plus guest stills. Use Timeline compose at $0.02 a shot to put a still beside the host.
A 60-second Sume Avatar 1.0 explainer with a product image is $15.48 on plus, $11.64 standard, $34.80 max. One job or two 30-second jobs, and what changes.
A 30-second Sume Avatar 1.0 product ad is $5.82 on standard, $7.74 on plus and $17.40 on max. When the extra $9.66 for max is worth it, and how to check first.
In Sume Avatar 1.0, product_image adds $0.01, $0.013 or $0.03 a second by tier; a photo scene sets the background. When to send which for a product explainer.
Sume Avatar 1.0 has no 4:5 ratio. Render 3:4, crop the height to 0.9375 with video filter for $0.02, and caption after the crop so nothing is cut off.
Sume Avatar 1.0 renders 1:1, 3:4, 9:16, 4:3 and 16:9 at 720p. Which ratio to pick for LinkedIn, Shorts, a feed post or a landing page, and what changes in cost.
A 45-second Black Friday offer video on Sume Avatar 1.0 costs $8.28 on standard, $11.03 on plus and $24.75 on max, no product image. What 45 seconds holds.
Sume Avatar 1.0 multi-scene plans can include a silence beat. How to place a 2-second pause in a product reveal and what it adds at $0.258 a second.
For a 20-second source clip, Sume's H3 Max Recast takes 5 to 30 seconds and 1 to 4 person photos; the Avatar Face Swap beta takes about 4 to 15 seconds.

MiniMax H3 Max lip-sync on Sume wants 5 to 14.8 seconds of audio. Join two short TTS lines with Timeline audio concat for $0.01 instead of padding.

To change two people in one video, send one reference photo for each. Sume's H3 Max Recast takes 1 to 4 person photos and a 5 to 30 second source video.
Keep one AI presenter across Shorts, feed and webinar slots: reuse a single avatar_handle and change only aspect_ratio on each Sume talking-video call.
A 20-second pre-order reminder with the cake photo as product_image costs about $3.88 on Standard, $5.16 on Plus or $11.60 on Max at Sume's rates.

Twelve 6-second avatar hooks come to 72 seconds: about $13.25 on Standard, $17.64 on Plus and $39.60 on Max at Sume's listed per-second rates, before rounding.
A weekly 25-second avatar update for a market costs about $4.60 on Standard, $6.13 on Plus or $13.75 on Max at Sume's listed per-second rates.
Sume accepts avatar scripts that it estimates at 4 to 60 seconds. Longer scripts need to be shortened or split into jobs; here is how to split without a jump.
A 20-second save-the-date spoken by an AI avatar costs about $3.68 on Standard, $4.90 on Plus or $11.00 on Max at Sume's listed per-second rates.
A 20-second avatar notice for a changed class time costs about $3.68 on Standard, $4.90 on Plus or $11.00 on Max at Sume's listed per-second rates.
No photo of your presenter? Sume creates an avatar from a text prompt or structured props such as age, sex and ethnicity. One POST, one flat creation price.
Korean script on a Sume avatar video with slam, punch or tiktok-green returns 400 caption_hangul_text_latin_style. Use black-outline or korean-ad.
A 15-second daily-special avatar clip with the dish photo as product_image costs about $2.91 on Standard, $3.87 on Plus or $8.70 on Max at Sume's rates.
A 30-second avatar video for an HOA or building notice costs about $5.52 on Standard, $7.35 on Plus or $16.50 on Max at Sume's listed per-second rates.
An 18-second avatar announcement for a library event costs about $3.31 on Standard, $4.41 on Plus or $9.90 on Max at Sume's listed per-second rates.

Tavus gates Griffin-Lite behind a request form for trusted testers and lists no price. Prepare a use case and a disclosure plan, and render with Sume meanwhile.
A 15-second avatar closure notice for parents costs about $2.76 on Standard, $3.68 on Plus or $8.25 on Max at Sume's listed per-second rates.
Sume avatar scripts must plan to 4 seconds or more. For a one-liner, add a silence beat in video_inputs or lengthen the line instead of padding with filler.

Tavus reports Griffin-Lite at 3.83 of 5 on VideoFDB generation against a 3.92 human reference. Those scores rate live conversation, not a scripted ad clip.
To animate an avatar from a voiceover you already approved, send its Sume-hosted audio_url and duration_seconds to Avatar 1.0 image-to-video. Limits inside.
Avatar creation on Sume is $0.95 each, so 100 avatars cost $95.00 before any video. Generation is billed separately per second.
50 thirty-second Sume Avatar 1.0 videos at plus quality cost $367.50 ($7.35 each); standard and max compared. No product image.
A 12-second Sume Avatar 1.0 talking video costs $2.2080 at standard, $2.94 at plus and $6.60 at max (no product image).