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 Showcase video: 3 to 60 seconds, 2:3, 1000x1500 on Sume
Pinterest's spec page lists 3-60 seconds, 2:3 and 1000 x 1500 for Showcase video. Sume Timeline can render 1000x1500 and a 3-second cut costs the same $0.10.
Omni 40-second ad: resend the packshot at every 10-second step
Google extends Omni clips to 40 s in 10 s steps with 10 s of prior context. On Sume, four 720p clips with the packshot as a reference cost $5.00.
YouTube 480p at 2.5 Mbps and 360p at 1 Mbps: size of a 60-second draft
YouTube lists 2.5 Mbps for 480p and 1 Mbps for 360p SDR uploads. A 60-second clip at those rates is about 18.75 MB and 7.5 MB; Sume sets no bitrate itself.
Crop 9:16 to 16:9 for TikTok horizontal: height 0.3164 is 1080x608
A 1080x1920 clip cropped to 16:9 keeps 1080x608, which clears TikTok's 960x540 horizontal minimum but uses a third of the frame. Numbers and request inside.
A 45-second dance reference needs two Kling motion control jobs: $7.09
Sume's Kling 3.0 motion control caps one reference at 30 seconds. A 45-second dance is a 30 s plus a 15 s job, about $7.09, joined by a timeline.
Content ID on a Short over one minute blocks it globally: keep a cut
YouTube says a video over one minute with an active Content ID claim is blocked globally. Keep a 59-second video-trim cut of every long Short as a fallback.
Kling 3.0 Element Binding: a face close-up, and one still on Sume
Kling says 3.0 Motion Control wants a clear facial close-up for Element Binding. Sume's route takes one still or a ready avatar. What that means for faces.
Kling motion control: 3 s minimum on Kling, 1 s field on Sume
Kling says action videos run 3 to 30 seconds. Sume's duration_seconds accepts 1 to 30. Why to keep the reference at 3 seconds or more, and what it costs.
Bumper and non-skippable ads bill per impression: cut 6, 15, 30 s
Google bills bumper and non-skippable in-stream per impression (Target CPM). Length is a creative call: cut 6, 15, and 30 second versions with video-trim.
Post-production cost for 100 AI clips: trim, caption, upscale
Trim is $0.02, captions $0.20, upscale $0.009 per second. Trim, caption and upscale 100 fifteen-second clips for $35.50 on Sume, then assemble them for $2.50.
Qwen-Image 2.1 subject extraction vs Sume's RMBG 1.0 cutout
Qwen-Image 2.1 lists subject extraction and native RGBA. For a product cutout on Sume, use the RMBG 1.0 background-removal route, which returns PNG with alpha.
Test a Kling motion control look on 10 seconds for $1.575, then run 30
On Sume a 10-second Kling 3.0 motion control test costs $1.575 and the full 30-second run $4.725. How to cut the test clip and what it can and cannot tell you.
TikTok ad creatives prohibit watermarks: sample corner stills first
TikTok's reservation spec prohibits watermarks, TikTok's own included. Pull stills with video-inspect and crop the four corners before a reused clip goes up.
TikTok reservation ads need 2,500 kbps: compute it from the probe
TikTok's auction page asks for 516 kbps, its reservation and TopView pages for 2,500 kbps. Compute the average from video-inspect size and duration first.
TikTok TopView locks assets at preloading: freeze the cut first
TopView creatives need sales-rep pre-approval and cannot change once preloading begins. Use Timeline's unbilled plan, then render once with an idempotency key.
YouTube in-feed ads have no max length, but video-trim caps at 1,800 s
Google lists no max length for in-feed video ads, but Sume's video-trim takes a source of 1,800 seconds at most and outputs 900. Plan long cuts around that.
Kling motion control still: 340 to 3,850 px edges, checked first
Kling's motion control guide sets a 340 px short edge and a 3,850 px long edge for the still. Check both in Python before a Sume job reserves money.
Skippable in-stream bills at 30 seconds: cut a 30-second version
Google bills skippable in-stream per view at 30 seconds watched, or full length if shorter. Cut a 30-second version of a long master with video-trim.
Split a 9-minute recording into three Reels under 3 minutes
Instagram's Reels page says Reels over 3 minutes won't be recommended to new audiences. Find sentence ends with video-inspect STT, then cut with video-trim.
Three-minute Short: songs cap at 90 seconds, so plan the music bed
YouTube says most songs run up to 90 seconds in a 3-minute Short, some 60 or 30. Build the 180-second timeline with a voice spine and a looping, ducked bed.
TikTok non-Spark ad captions: no links, @ or hashtags, lint first
TikTok's auction page says non-Spark captions allow no links, @ symbols, or hashtags; Spark Ads take 4 caption lines. Lint the text in Python before upload.
White backgrounds hide TikTok's ad UI: dim the clip, check for free
TikTok's reservation page warns that white or transparent backgrounds can hide the nickname and captions. Dim with video-filter ops, check first, then re-probe.
TikTok reservation ads must include audio: probe, then add a bed
TikTok's reservation spec says every video creative must include audio. Probe has_audio with video-inspect, then give a silent clip a voice or music spine.
TopView says 15 seconds, reservation says 9-15: trim both for $0.04
TikTok's TopView page recommends 15 seconds and the reservation page 9-15. Cut a 9-second and a 15-second version from one master with two video-trim jobs.
Will my upload become a YouTube Short? Check the probe first
YouTube classes square or vertical video up to 3 minutes as a Short; 16:9 stays long-form. Check width, height, rotation, and duration from the probe.
Reels picture-in-picture test: check the four corners first
Instagram is reported to be testing picture-in-picture. Crop each corner of your 1080x1920 Reel with video-filter, free to check, $0.02 to encode.
Picture-in-picture Reel on Sume: what Timeline compose can do
Compose puts one still over one video for $0.02, up to 300 s. Position top, center or bottom; width_ratio 0.05 to 1. It is not a video-in-video PiP.
Repurposing TikTok and Reels to Shorts: restyle captions once, $0.20
Reposting a clip to YouTube Shorts? Keep a clean master and burn captions with Sume: $0.20 a job for up to 60 seconds, and restyles skip a second transcription.
Shorts editor splits audio from video: make voice and music files
YouTube's Shorts editor now keeps audio apart from video. Make a clean voice file and a music bed on Sume for $0.163 and drop each on its own track.
YouTube Shorts music not working: bake in your own bed
When library music fails on a Short, a bed you generated is part of your file. How to make one for $0.125 and duck it under speech.
Product cutout pop-in for Shorts: RMBG plus compose cost
Cut a product photo out for $0.0225 and overlay it on a clip for $0.02. The per-product price of a pop-in, with the limits.
Captions for sound-off Shorts: three sources, $0.20 per job
Burn-in captions on Sume cost $0.20 per job up to 60 s. Cues can come from a script, TTS timestamps or STT at $0.01 per minute.
YouTube Shorts narrator voice: cost by script length
What a Shorts narrator costs on Sume TTS 1.0 at $0.0475 per 1,000 characters, from a 300-character line to the 20,000-character request cap.
10-minute video compose: Timeline costs $1.00, plan first
Timeline bills $0.10 per output minute, so a 10-minute video is $1.00 and a 30-minute one is $3.00. Limits: 1,800 seconds and 200 slots.
YouTube Shorts: Seedance 2.5 audio on, off or detached, same price
Shorts editors now separate audio and video tracks. On Sume a 15-second Seedance 2.5 clip is $8.67 with or without audio; detach the sound for $0.01 per job.
YouTube Shorts splits audio and video: pull the track for $0.01
The Shorts editor now edits audio and video as separate tracks. To rework the sound of a clip you already rendered, Sume audio detach returns a WAV for $0.01.
Read an AI video's transcript before posting: Sume video inspect
Spoken claims in an AI video are easy to miss. Use Sume video inspect with transcribe to read what was said before you post on TikTok or LinkedIn.
YouTube suggests 3 Shorts thumbnail frames: pick from 24 yourself
YouTube suggests three frames for a Shorts thumbnail. Pull up to 24 candidates with Sume video frames and choose your own.
Black first frame in a Short? Fade-in and your thumbnail frame pick
output.fade_in_seconds in Timeline 1.0 starts the video from black, so frame 0 is a poor thumbnail. Pick a frame after the fade with Sume video frames.
Reels image ad with auto music, or your own video? Still to 9:16
Meta's Advantage+ Creative can add music to Reels image ads. When to instead turn the still into a 9:16 video with image-to-video on Sume.
YouTube thumbnails take JPG or PNG: output formats per Sume image row
YouTube accepts JPG and PNG thumbnails. Sume rows list png, jpeg or webp; Recraft V4 is webp only, Soul and Ideogram 4.5 pick the format for you. Table and fix.
A/B test three hook lines on one Short with caption cues
YouTube says A/B testing of up to three video cuts is coming soon. Prepare three hook-line variants from one clean Short with Sume caption cues at $0.20 each.
A small 540x960 draft of a Short for quick feedback: output size
Render a lighter 540x960 draft of a Short with Timeline 1.0 output width and height. The size is free to choose; the price per minute is the same.
Exact 9:16 Shorts thumbnail with gpt-image-2.5: use 1152x2048
gpt-image-2.5 on Sume takes custom sizes in multiples of 16. 1152x2048 is exactly 9:16 and above the pixel minimum, while 576x1024 is below it.
YouTube Shorts thumbnail file type and size: JPG or PNG, 9:16, 50 MB
YouTube's help page gives JPG or PNG, 9:16, 2160x3840 and 50 MB on desktop for Shorts thumbnails. Export that from a video frame with Sume video frames.
Threads video over 5 minutes: split an AI video with Sume video trim
Threads takes videos up to 5 minutes. How to cut a longer AI video into parts with POST /v1/video-trim, and what each cut costs on Sume.
Trim, caption, compose: Sume returns new files, keeping your original
Sume's trim and caption tools return new MP4s and leave the source unchanged. Why that keeps the original AI generation intact, and what each step costs.
Ask Studio says my Short drags: cut the dead air in Python
When feedback says a Short drags, find pauses from word timings and rebuild it without them. Tested Python and the Timeline 1.0 body.