Hailuo H3 Regen on Sume: regenerate one H3 clip at 2K
hailuo-h3-regen re-prompts a clip you made with MiniMax H3 and returns 2K. The source must be 768p H3 output, 4.5-15 s with audio. Read 2026-10-13.
Media tools
Sume media tools by API: trim, filter, captions, frames, inspect, speech-to-text, upscaling, background removal, transitions, and Timeline assembly.
Start with: Video editing API limits: Sume media tool caps in one table
Pinterest video ratio floor 1:2: which Sume output sizes pass
Pinterest asks you to avoid video ratios beyond 1:2 and 1.91:1. 1080x1920, 1080x1350 and 1080x2160 all land inside; here is the arithmetic.
Whistle needs 16 kHz mono audio: extract it from a video first
Whistle takes 16 kHz mono audio. Sume audio detach returns exactly that shape from a hosted video with sample_rate 16000 and channels mono.
Free in-browser video upscaler (10 files, 5 min) vs an upscale API
A free upscaler added batch mode on Oct 11: 10 files, 100 MB, 5 minutes each, in-browser. When Sume's video upscale API fits better, and what it costs.
Suno Studio clip stretching: fit AI music to a video on Sume
Suno Studio added clip stretching, downbeat detection and fade curves on Oct 8, 2026. Sume has none of them; it fits music by prompt, trim, fade and duck.
Caption a video over 10 minutes: Sume's 600 s row limit
Sume's veed-subtitles row accepts clips of 2 to 600 s. A 25-minute video needs three parts, each billed at least 60 s. Splitting plan inside.
Short clip lipsync: Kling bills 5 s steps, LatentSync 40 s
A 6 s clip on Sume Kling Lipsync bills 10 s; a 12 s clip on LatentSync bills 40 s. The billed seconds for both rows, with a table.
Lip sync an existing video to new audio: 8 Sume video rows
Eight Video Router rows re-sync a clip you already have to new audio: video_url plus audio_url, 2 to 60 s on most, 9 s on InfiniteTalk Video.
Lip sync audio longer than the video: which duration to send
On Sume video-to-video lipsync, duration is the output's length: the shorter of clip and audio. Kling Lipsync is the exception and takes the clip's.
VEED Subtitles styles on Sume: 9 dynamic bill twice
Sume's veed-subtitles row has 30 VEED caption styles: 9 dynamic ones bill twice, 21 basic ones bill once, and 6 take a second highlight color.
Make the spoken caption word bigger or bolder: typography ranges
Sume's design.typography sets weight, spoken-word scale, size, safe width and outline width for burned-in captions. Here are the exact ranges and the 400s.
video-inspect fast seek: sample_times vs requested_times on a Short
Why the still from a fast video-inspect can be earlier than the time you asked for, which field tells you the real instant, and when to use precise instead.
Brighten an underexposed AI video: exposure in video-filter
To lift a dark clip in Sume, send filtergraph exposure=exposure=0.6 to video-filter. Range -3 to 3 stops, one $0.02 job, source clip up to 300 seconds.
Reduce green spill on a subject: despill in Sume video-filter
To remove a green cast from a person shot against a green backdrop, send despill=type=green:mix=0.6 to Sume's video-filter. One $0.02 job per clip.
Turn a video into a line drawing: edgedetect in video-filter
Send edgedetect=low=0.08:high=0.3 to Sume's video-filter for an outline look on any hosted clip. Add negate for dark lines on white. One $0.02 job.
avgblur, boxblur, gblur or smartblur: which blur on Sume?
Sume's video filter allows four blur filters. What each does, which to pick for a soft background, and how to check a graph free before the $0.02 encode.
Thicken or thin bright shapes in a video: dilation and erosion by API
dilation grows bright areas and erosion shrinks them, two allowlisted filters in Sume's video filter. When they help and how to check cheaply.
Swap the colours of a video by API: the swapuv chroma-swap look
swapuv exchanges a clip's U and V chroma channels and leaves brightness alone, a quick surreal colour look. How to run it in Sume's video filter.
Which ffmpeg filters does Sume's video filter allow? All 66
Sume's video filter accepts a fixed allowlist of 66 pixel filters in five groups: tone, blur, geometry, time, compositing. The list, the caps, and a free check.
Avatar micro twitches: what Sume's 2 fps frame check can see
Tavus says Phoenix-4.5 cut micro twitches. To check your own clip, Sume's frame sampler tops out at 2 fps; use explicit times for 24 neighbouring frames.
Remix cut refused with only a start time: the 120 s budget
Why a remix media cut with start but no end fails remix_cut_too_long, how the 120 second and 20 span limits add up, and when to use video trim instead.
Remix notes lint: FORMAT.md needs a Captions heading
What the remix media notes verb checks: a Captions heading in FORMAT.md, media.sume.com links only, the 200,000 byte cap, and why a lint failure still saves.
Remix tile: 96 cells per call, and how to count yours
A remix media tile call is refused above 96 cells with remix_tile_too_many_cells. How each selector is counted, worked examples, and ways to split a request.
Remix tile accepts a reference ingest id; other verbs do not
Use a finished reference ingest id as understanding_id for remix tile, including around without a transcript job. Boundaries and cut still need a probe.
Which Sume media routes need a flag, and which are on prod?
Remix media, reference ingest and the trending-videos rebuild are flag-gated; video inspect, frames, trim, detach, filter and timeline are on dest and prod.
Add a soft glow to an AI video by API: gblur and screen blend
Make a dreamy bloom on a finished clip with one Sume video-filter graph: split, gblur, then a screen blend at 0.35 opacity. Free check, $0.02 encode.
Burn 2.39:1 cinematic bars into a clip: drawbox fractions
Add scope-style black bars to a clip without changing its aspect ratio, using two drawbox fills in Sume video filter. Bar heights for 9:16, 16:9, 1:1 and 4:5.
CRT scanline look on a clean AI clip: drawgrid plus noise
Add dark horizontal scanlines and light flickering noise to a finished clip with a two-filter Sume video-filter graph. $0.02 per encode, free check first.
Mirror a video down the middle: a symmetry effect with hstack
Make a left-right symmetric video from one clip with a Sume video-filter graph: keep the left half, mirror it with hflip, join with hstack. $0.02, free check.
Pixelate part of a video by API: a fixed-region mosaic
Hide a label or a screen area with a mosaic using one Sume video-filter graph: crop a region in 24-pixel multiples, shrink, enlarge with neighbor, overlay.
Rule-of-thirds grid on a review copy of a video: drawgrid
Burn a thirds grid onto a review copy of a clip with Sume's drawgrid filter: one line of graph, $0.02, free check. Never ship the gridded file.
Straighten a tilted video by API: rotate, then crop by angle
Level a crooked horizon with Sume video filter: rotate in radians, crop out the corners with a factor per angle (0.97 at 1 degree), scale back. $0.02.
Sume media import failed: source_not_found vs source_not_video
A Sume media import fails with source_not_found for private, deleted or region-locked posts and source_not_video for photos and carousels. Don't retry either.
Timeline failed with source_not_found: read source_slot to find it
A failed Sume Timeline job names the dead input by slot, like video[3] or soundtrack, plus host and 404 or 410. Replace it with a media.sume.com asset URL.
Whistle word timestamps to burned captions with Sume's words field
Turn Whistle's on-device word timings into burned-in captions: map them to words with text, start and end, then call Sume video captions with no STT run.
Open and close a clip with a white flash: the fade filter
Fade a clip in from white and out to white with two fade filters in Sume video filter. Out time comes from the clip duration; audio is untouched.
Add a zoomed detail inset to a video: crop, scale, overlay
Show a magnified product detail in the corner of the same clip using one Sume video-filter graph: split, crop, scale 2.4x, white border, overlay. $0.02.
Winter solstice class clip: dim and vignette a Wan clip for $0.02
Make a candlelit winter solstice (Mon Dec 21, 2026) class promo: a 6-second Wan 3.0 clip, a dim and vignette video-filter pass for 2 cents, cues. $0.595 total.
Trim, filter, frames, inspect or detach: which Sume media call?
Pick the Sume media API by the output you need: trim cuts an MP4, filter dims or crops, frames gives stills, inspect probes, detach gives audio.
Video frames API returns 202, not 200: poll GET /v1/video-frames/:id
Sume video frames always answers 202 and ignores mode sync. Poll GET /v1/video-frames/:id until resource_status is ready, then read frames[].url.
Video trim 400 video_trim_range_required: add end or duration
The Sume video trim API returns video_trim_range_required when the body has start but neither end nor duration. Send exactly one of the two; here is the fix.
YouTube Shorts 1080p and 100-character title: Sume's default fits
YouTube's Shorts page lists 3 minutes, 1080p maximum and a 100-character title. Sume Timeline's default 1080x1920 output already matches.
TikTok Spark Ads have no length cap; non-Spark stops at 10 min
TikTok's page lists no duration restriction for Spark Ads and up to 10 minutes for non-Spark ads. Decide which one needs a Sume trim before you upload.
Instagram Stories ad at 16 seconds: split into cards or trim?
Instagram may split Stories video ads of 16 seconds or longer into one to three cards. Cut under 16 seconds with one Sume video trim at $0.02 to keep one card.
Snapchat single video ad: 25-char brand, 34-char headline, 720x1280
Snapchat's single image or video ad lists 9:16 at 720x1280, 3-180 s, a 25-character brand and a 34-character headline. Here is how to prepare each with Sume.
Instagram's 1% aspect tolerance: which odd sizes still pass 9:16
Instagram video ad pages list a 1% aspect ratio tolerance. Here is the arithmetic for 9:16 widths, and how to render an exact 1080x1920 shot in Sume Timeline.
TikTok ad account name: 20 characters, and Spark caption: 4 lines
TikTok's In-Feed page lists a 20-character account name (10 for CJK scripts) and a 4-line Spark caption. Write them before you render the Sume clip.
LinkedIn video ads max out at 1920 px per edge: set the size
LinkedIn lists 360 to 1920 pixels per edge for video ads. Sume Timeline allows up to 2160, so set 1080x1920 or 1920x1080 yourself and keep sizes in range.