Merge Video
在浏览器中使用「Merge Video」完成图片与设计相关任务；输入内容和结果默认在设备上处理。
LOCAL WEBM MERGE
Join video clips in your chosen order
Your browser plays each selected clip into one canvas and records a new WebM file. It never relabels a source video as a merge.
Checking browser video-export support…
Privacy: source files, playback, canvas rendering, audio routing, recording, previewing, and download remain in this browser tab. Clearing the tool or leaving the page releases its temporary URLs.
使用步骤
如何使用
- Choose 2–6 MP4, WebM, Ogg, or MOV clips that your browser can decode.
- Use the up and down controls to set the exact playback order and review the combined duration.
- Create, preview, and download a newly recorded WebM video with each clip’s browser-decodable audio.
A genuine merged video
This tool plays each selected source locally, renders its decoded frames into one canvas, and records that canvas with MediaRecorder. It records browser-decodable source audio at the same time. The result is a new WebM file whose MIME type is checked before download; no source file is renamed or passed through as a merge.
Order, format, and sizing
The displayed list is the playback order, and no silence is inserted between clips. The first clip sets the output canvas dimensions, scaled down to at most 1920 pixels per side and 2 megapixels. Later clips are centered to fit that canvas, so different aspect ratios receive black bars instead of being cropped or stretched.
Defined browser limits
Use 2–6 videos, each up to 75 MB and 5 minutes. Combined duration is limited to 10 minutes, the output recording to 300 MB, and canvas output to 2 megapixels. The browser stores recorded chunks in tab memory until the download is ready, so shorter clips are more reliable on memory-constrained devices.
Browser compatibility and privacy
Export requires Canvas captureStream, Web Audio, and a WebM-capable MediaRecorder. Video and audio codecs still must be decodable by your current browser. Files are never uploaded: selection, playback, rendering, recording, preview, and download stay inside the current browser tab.
常见问题
你可能还想知道
Can I change the clip order?
Yes. Use the up and down controls before creating the file. The displayed order is the exact order used in the merged video.
Will audio be kept?
The tool records the audio that the browser can decode from each clip. A clip without an audio track remains silent, and a source whose audio codec the browser cannot decode may not contribute audio.
Why is the download WebM?
The tool only offers a real output when the browser reports a supported WebM MediaRecorder MIME type. The download name and label use the MIME type actually reported by that recorder.
What happens when clips have different sizes?
The first clip sets the output canvas. Later clips are resized to fit inside it without distortion, and unused space is black.
Do my videos leave my device?
No. This browser-only tool does not upload, store, or send selected videos to a server.