How to remove the intro from a video
- Step 1Drop your video file — Drop your video and pick a start + end time
- Step 2Set your in and out points — JAD seeks to the nearest keyframe and stream-copies the slice
- Step 3Export the trimmed clip — Download the trimmed file at original quality
Frequently asked questions
Why is lossless trim faster than normal trim?+
Normal trim re-encodes the entire video with a codec like H.264 — this processes every frame, which on a 10-minute 4K file can take 2–10 minutes. Stream-copy simply repositions the start and end byte offsets in the container without touching the compressed frame data. The only processing is re-writing the container metadata, which takes milliseconds per gigabyte.
Will the start frame be exact or offset to the nearest keyframe?+
Stream-copy requires the start point to align to a keyframe (I-frame), because compressed video frames depend on preceding keyframes for decoding. If you set your start point between keyframes, JAD rounds to the nearest previous keyframe. For most content, keyframes appear every 1–3 seconds. If you need frame-accurate cuts with no rounding, enable re-encode mode at the cost of processing time.
Can I trim 4K HDR footage without losing HDR metadata?+
Yes. Stream-copy preserves all codec-level metadata including HDR10, HLG, and Dolby Vision (in compatible containers). The colour space, max luminance values, and mastering display metadata pass through untouched because no transcoding occurs. Verify HDR tags are intact in the output using MediaInfo.
Privacy first
All video processing runs locally in your browser using WebAssembly and FFmpeg. No file is ever uploaded — only metadata counters are saved for signed-in dashboard stats.