Twitch 2K clips: trim a 1440p clip without setting output

Trim a 1440p Twitch clip with POST /v1/video-trim and leave output out. When output is set, width and height must be between 256 and 2160, and a 1440p frame is 2560 wide, so conforming to its own size is refused. Omitting output makes the trim inherit the source.

The 2K details are from Twitch's 2026-06-17 post and the limits from Video trim, read 2026-09-30. The 2560x1440 frame size is the standard meaning of 1440p, not a number in either source.

What did Twitch add for 2K?

The post says Partners and Affiliates can stream at 2K (1440p), with bitrates up to 9 Mbps for 1440p, using HEVC. It adds that higher quality streams unlock 2K Clips and VODs.

What does video-trim do with the size?

What does a minimal 1440p trim look like?

Import the clip first, since trim only reads media.sume.com files, then send a range. This takes seconds 2 to 10 and sets no output.

curl -X POST https://api.sume.com/v1/video-trim \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: trim-2k-001" \
  -d '{
    "video_url": "https://media.sume.com/artifacts/artf_demo/clip.mp4",
    "start": 2,
    "end": 10
  }'

Is the result still HEVC?

Not with the default. The docs say exact re-encodes to libx264 with yuv420p; keyframe is a stream copy whose cut may start a GOP early. The docs do not list a source resolution cap, only duration caps, and this post does not claim how a 2K source behaves beyond what the page states. For codec details see trim output codec.