Lossless Video Trimmer

Upload an MP4 video and a JSON file defining segments. Choose to keep or remove these segments. The video will be processed losslessly (no re-encoding) using ffmpeg.wasm. Optionally, upload a VTT/SRT subtitle file to process alongside the video.

1. Upload Video (MP4):

2. Upload Edit JSON: JSON should contain a `clips` array with `start` and `end` frames, and video `duration` frame count and `timebase` under `video.media.video`. Download Example JSON

3. (Optional) Upload Subtitles (VTT/SRT):

4. Processing Mode:

Keep selected segments Remove selected segments

Status: Waiting for files...

Lossless Video Trimmer

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