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
YouTube Shorts video specs: 3 minutes, square or vertical
YouTube treats square or vertical uploads up to 3 minutes as Shorts and recommends MP4, H.264, AAC-LC, and 48 kHz. How Sume output compares.
LinkedIn video ad specs: under 30 fps, 4:5, and SRT captions
LinkedIn video ads take MP4 in H.264 or VP8 below 30 fps, 3 s to 30 min, up to 500 MB, with SRT captions. Set 24 or 25 fps and crop to 4:5 with Sume.
X (Twitter) video upload specs for AI-generated clips
X recommends H.264 at 30 or 60 fps and 1280x720 or 720x1280, and caps default Post video at 20 minutes. How a Sume clip maps to each line.
Pinterest pin size and video specs: 2:3 images and clips
Pinterest recommends 2:3 or 1000x1500 image Pins and takes 4 s to 15 min video. Make 2:3 images with Sume, and crop 9:16 clips to 2:3 or 4:5.
Amazon Sponsored Brands video specs: what to check first
Amazon wants 6–45 s of 16:9 video, Main or Baseline profile, 23.976 to 30 fps, and no bars. What a Sume Timeline render sets, and what you check.
How to automatically turn Shopify product photos into videos
Automate Shopify product photos into videos with an App Store app, a URL-to-video tool, or an image-to-video API pipeline. Options, prices, and limits.
Add captions to a long video by API: split, caption, rejoin
One Sume caption job takes up to 60 seconds of video. Cut a longer video into chunks, caption each one, then rejoin them over the original audio.
Video editing API: which Sume endpoint for each edit
A task-to-endpoint map of Sume's video editing API: which call cuts, crops, captions, joins, or re-voices a video, and which guide explains each edit.
Remove part of a video by API: cut a section and rejoin
Video trim keeps one range per job. To cut a section out of the middle, render the kept ranges back to back in one Sume Timeline 1.0 job.
Translate a video's voiceover by API: STT, TTS, Timeline
Replace a video's spoken track with Sume: transcribe it, translate the lines yourself, speak them with TTS, and render the video over the new voice.
Add background music to a video with an API: loop, fade, and duck
Add a soundtrack to a Sume Timeline 1.0 render to mix Sume-hosted music under a voice spine: set its level, loop it, fade it out, and duck it under speech.
Convert a landscape video to vertical 9:16 with the Sume API
Crop a 9:16 window from a Sume-hosted 16:9 clip with video filter, or put the clip in a 1080×1920 Timeline render with a cover, contain, or blur fit.
Split a long video into short clips with the Sume API
Transcribe a Sume-hosted video with video inspect to find cut points, cut each range with video trim, then crop and caption each short clip.
Replace or remove the audio in a video with the Sume API
Remove a clip's audio with video trim's audio: drop, replace it by rendering the clip over a new Sume-hosted spine in Timeline 1.0, or re-level it with gain_db.
Video transitions API: crossfade, wipe, and slide between clips
Add fade, wipe, slide, or dissolve transitions between clips in a Sume Timeline 1.0 render: up to 1 s each, snapped to whole frames, at most 8 in a row.
Image slideshow video API: turn Sume images into an MP4 with music
Turn Sume-hosted images into a slideshow MP4 with Timeline 1.0: stills as video slots, a silent spine for the length, and a looped soundtrack for the music.
Korean subtitles API: Hangul caption styles and fonts without tofu
Burn Korean subtitles with Sume's captions API: pick a Hangul-safe style and font so Korean copy renders in Hangul faces, not tofu boxes.
Auto-generate subtitles API: transcribe, fix the text, then burn
Auto-generate subtitles with Sume: transcribe a clip with video inspect, correct the words, then burn them in with script_text alignment.
Customize captions API: color, position, size, and words per line
Customize burned-in captions with Sume's design object: override color, position, size, and words per phrase on every style except punch and tiktok-green.
Change a video's frame rate or resolution with the Sume API
Conform a Sume-hosted clip's size and fps with video trim's output field or the filter's scale and fps filters, and see how Timeline picks an output frame rate.
Video editing API limits: Sume media tool caps in one table
Source and output lengths, counts, and sizes for Sume's trim, filter, detach, frames, inspect, captions, and Timeline APIs, each linked to its docs page.
How to assemble a long-form video with the Timeline 1.0 API
Timeline 1.0 renders one audio spine plus 1 to 200 ordered video slots into one MP4. Every URL must be Sume-hosted; the plan preflight is unbilled.
How to use Sume's Timeline compose and Timeline audio APIs
Timeline compose puts one still and one video in the same frame as a new MP4. Timeline audio joins or splits Sume-hosted audio into reusable files.
Trim, filter, or detach audio from a video with the Sume API
Video trim cuts a range into a new MP4, video filter dims or crops into a new MP4, and audio detach extracts a wav or mp3. Each takes one Sume-hosted clip.