Guides
Sume guides: the API, Formats, agents, models, media tools and pricing, each answer dated and sourced.
Fabric request: image_url and avatar_handle together are not allowed
Sume's VEED Fabric 1.0 body needs exactly one visual source: image_url or avatar_id / avatar_handle, never two. Valid bodies and audio rules.
Video filter limits: 8 ops, 2,048 characters, 32 filters
Video filter takes up to 8 dim/crop ops plus a filters-only graph of 2,048 characters and 32 filters. See what is allowed, what is refused, and the free check.
Video inspect with fps 0.4 returns 24 stills from a 60-second clip
The inspect frames program caps at 24 stills and fps at 2. For a 60-second clip, fps 0.4 fills all 24 slots, 2.5 seconds apart, centered in each bin.
Gemini 3.8 TTS, v4 Turbo, Scribe v2: which can you call via Sume?
None of the three. Sume's catalog (read 2026-10-09) lists sume/tts-1.0, five Sonic router ids, sume/stt-1.0 and three music ids. What to do with their files.
YouTube stereo audio at 384 kbps in a 3-minute Short is 8.64 MB
YouTube's upload page asks for 384 kbps stereo, 128 mono, 512 for 5.1, at 48 kHz. For 180 seconds that is 8.64, 2.88 or 11.52 MB; Sume detach can write 48 kHz.
Is 1080p worth 2.5x? Seedance 2.5 12-second clip by resolution
A 12-second Seedance 2.5 clip costs $3.22 at 480p, $6.93 at 720p and $17.06 at 1080p on Sume. 1080p is 2.46x the 720p price and 5.29x 480p.
Seedance 2.5 shortest clip: what 4 seconds costs vs Seedance 2, Wan 3
The shortest Seedance 2.5 clip on Sume is 4 seconds: $1.07 at 480p, $2.31 at 720p, $5.69 at 1080p. Compared with Seedance 2 and Wan 3.0.
Timeline render: 61 seconds costs double 60 on Sume
Sume Timeline reserves $0.10 per output minute, rounded up: a 60-second render is $0.10, a 61-second render is $0.20, a 30-minute render is $3.00.
What happens at zero credits mid-batch: 402 on Sume
When a Sume balance cannot cover a generation the API returns 402 insufficient_credits. Failed jobs are refunded before capture. Cap a batch locally.
Korean captions API error: caption_hangul_text_latin_style (400)
Sume refuses Korean text on the slam, punch and tiktok-green caption styles with a 400. Use black-outline, korean-ad or another Hangul style; $0.20 a job.
Crop 1920x1080 to 9:16 with an API: width 0.3164, x 0.3418
Center-crop a 16:9 clip to vertical with Sume video filter: the crop fractions, the arithmetic, and why 1280x720 falls under TikTok's 540x960 minimum.
Video inspect API: 24 stills max, so 2 fps covers only 12 seconds
Sume video inspect returns at most 24 stills per call and caps fps at 2. How to size frames.fps for a 60-second clip, plus fast versus precise seek.
Timeline refuses 9 chained fades: too_many_chained_transitions
Sume Timeline 1.0 refuses more than 8 adjacent fades with too_many_chained_transitions. How transitions are validated, and the hard-cut fix.
Rendered video judders: output_fps_resamples_sources and 24 to 30 fps
Why a Sume timeline render can stutter when output.fps differs from your clips, what the output_fps_resamples_sources warning means, and the fix: omit fps.
Fast video cut API: precision keyframe and actual_start_seconds
Sume video trim has two modes. Keyframe copies the stream and can start a GOP early; exact re-encodes. Both cost $0.02. Re-base on actual_start_seconds.
1:1 square AI video on Sume: eight rows take it, Omni does not
Eight Sume video rows list 1:1 as an aspect ratio. Gemini Omni Flash 1.1 allows only 16:9 and 9:16. Cheapest square clip: 5 s at 480p is $0.31.
Talking photo greeting: 8 seconds on Fabric 720p plus voice-over cost
An 8-second talking-photo greeting on VEED Fabric 1.0 costs $1.50 at 720p or $0.80 at 480p, plus about $0.0114 of TTS for a 240-character line.
Cheapest possible clip per Sume video model: the minimum-length floor
The cheapest legal clip on Sume ranges from $0.11 (Omni, 3 s at 360p) to $1.07 (Seedance 2.5, 4 s at 480p). Per-second rates hide the minimum-duration floor.
Claude Dynamic Workflows events vs Sume's single terminal run event
Anthropic's Oct 9 Dynamic Workflows beta streams workflow_run.* events. Sume sends one terminal webhook per run, no stream. How to fan out and track progress.
Gemini 3.7 Flash now routes to 3.8: where a media client pins ids
Google auto-routes gemini-3.7-flash to gemini-3.8-flash since Oct 8. Where Sume lets you pin a model, where it routes for you, and what the job records.
Gemini 3.8 Flash TTS vs Sume TTS: break-even is 47 characters
Gemini 3.8 Flash TTS costs $0.00225 per 10 seconds of audio; Sume TTS costs $0.0475 per 1,000 characters. They tie at about 47 characters per 10 seconds.
Gemini Omni Flash 1.1 prompt length on Sume: a 20,000-character check
The Sume catalog constraint for Gemini Omni Flash 1.1 is a prompt of at most 20,000 characters, 3 to 10 seconds. A short Python preflight check before you pay.
GPT Image 2.5 at 1024: xhigh is about 3,122 tokens and max about 7,024
Sume's docs put xhigh at $0.09366 and max at $0.21072 for a 1024 image at $30 per million tokens. That implies 3,122 and 7,024 tokens, before Sume's margin.
4K image prices: FLUX.3 is 6.07x its 2K, Nano Banana 2.1 on Sume 1.33x
FLUX.3 Image costs $0.607 at 4K and $0.100 at 2K, a 6.07x jump. Nano Banana 2.1 on Sume goes from $0.15 to $0.20, a 1.33x step, and Pro is flat from 1K to 2K.
Sume hosted MCP from a CI runner: API key or OAuth?
A headless runner cannot finish the OAuth consent page. Hosted Sume MCP also takes an API key as Bearer or x-api-key. What that session can call, and the rules.
Meta's 4 GB video cap at Sume's 30-minute render limit: 17.8 Mbps
Meta ad video tops out at 4 GB. A 30-minute Sume Timeline render can average up to 17.8 Mbps and fit; a 15-minute Reels ad allows 35.6 Mbps. Table inside.
MiniMax H3 768p vs Gemini Omni Flash 720p: an 8-second clip
On Sume, an 8-second clip is $0.60 on minimax-h3 at 768p and $1.00 on gemini-omni-flash-1.1 at 720p, with $0.30 at Omni's 360p. Price and constraints.
Nano Banana 2.1 0.5K is a 512 tier; YouTube thumbnails need 640 wide
The Image API names its smallest tier 512, below YouTube's 640-pixel minimum thumbnail width. 91 test thumbnails cost $6.825 at 0.5K, $9.10 at 1K, $13.65 at 2K.
Status reads for a full Sume queue: 3,600 to 72,000
Poll every accepted job every 2 s for 20 minutes: Free makes 3,600 reads, Scale 72,000. The math, and how one field cuts it.
POST /v1/videos vs POST /v1/video-router/generate on Sume
Sume's docs recommend POST /v1/videos for new integrations; Video Router stays available and unchanged. Same catalog, same jobs, different request shape.
Python verifier for Sume webhooks: rotation header and empty secrets
A Python function that checks the sume-v1 HMAC over timestamp.raw_body, accepts either signature during rotation, and refuses an empty secret. Under 30 lines.
Seedance 2.0 at 1080p or Seedance 2.5 at 720p: 10 seconds on Sume
On Sume a 10-second Seedance 2.0 clip at 1080p costs $8.51 and a Seedance 2.5 clip at 720p costs $5.78. Seedance 2.0 at 720p is $3.78. The full grid.
Make an SRT file from Sume STT word timings in Python (7 words a cue)
Sume STT always returns words[] with word, start and end in seconds. This Python function turns the list into an SRT file, seven words a cue.
TikTok ad text is fixed white; a brand typeface must be burned in
TikTok shows ad text in white, fixed font, no links, @ or hashtags. A brand typeface must be burned into the video; what Sume's caption API can set.
VEED Fabric audio must be under 10 MB: stereo wav tops out near 56 s
Sume lists VEED Fabric 1.0 audio as Sume-hosted, under 10 MB, at most 300 seconds. A 44.1 kHz stereo wav hits 10 MB near 56 seconds; a 128 kbps mp3 never does.
Wan 3.0 reference clips: four 4-second videos break the 15 s cap
Wan 3.0 accepts up to 5 reference videos totalling 15 seconds at 16 fps or more. Four 4-second clips total 16 seconds and fail; three 5-second clips pass.
Which Sume wait mode fits which job: image, video, avatar, swap
Sume's async, sync, subscribe and webhook modes differ only in how you learn the outcome. A table by job length, and why 30 seconds is a request budget.
YouTube can add an AI label you cannot remove: C2PA 2.1 and Sume jobs
YouTube auto-labels files with Content Credentials 2.1+ and can add a label creators cannot remove. What to record per Sume job, and what the docs do not claim.
YouTube's in-Shorts AI clips are 10 s and auto-labelled; yours are not
YouTube's Shorts AI tools make clips up to 10 seconds, auto-disclosed. A clip made on Sume and uploaded is not auto-labelled; you set the answer yourself.
Library song capped at 90 s in a 3-minute Short: 90 seconds left bare
YouTube caps most Shorts Audio Library songs at 90 seconds in a 3-minute Short, some at 60 or 30. Uncovered time per cap, and how to score the rest on Sume.
Agency Batch of 10 Clips: Draft at 480p, Final at 1080p, Priced
Budget a 10-clip client batch on Seedance 2.5: 480p drafts, two revision rounds on 4 clips, then 1080p finals, versus rendering everything at 1080p.
App Promo Half-Banner: A Headline Still Over a Screen Recording
Stack a headline image above an app screen recording in one 9:16 shot with timeline compose: layout ratio, overlay mode, output size and a $0.02 price.
Avatar Presenter Training Video Over 60 Seconds: Split Into Jobs
A single avatar video job covers 4 to 60 seconds. Plan a 3-minute presenter video as three jobs and stitch them: costs at standard, plus and max quality.
Face Swap a 15-Second Clip With a Consented Avatar: What It Costs
Beta Avatar Face Swap on Sume applies a ready avatar to a 4 to 15 second source video. Price at standard, plus and max, the avatar fee and the consent rules.
Narrated Lesson Video From 10 Slides: A Seven-Minute Cost Breakdown
A 7-minute course lesson from a script and 10 slide images: TTS, gpt-image-2.5 slides and a Timeline 1.0 render, with each line of the bill worked out.
Localize One Ad to Korean: Burned-In Captions With Hangul Styles
Add Korean captions to an ad: why Latin styles return a 400, which Hangul style to pick, how a restyle skips a second transcription, and what a job costs.
Shadowing Audio for 30 Sentences With script_run: Cost and Setup
Make 30 sentence-length audio clips for a language lesson with one script_run program and tts_create: the cost for 80-character lines and the limits.
YouTube Shorts Over 60 Seconds: Why a Music Claim Blocks the Video
A YouTube Short longer than one minute with an active copyright claim is blocked worldwide. What that means for music choices, with Sume's Music Router noted.