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免費影片合併工具
按你選擇的順序將多個影片片段合併為一個 MP4。尺寸不同的片段會用黑邊適配；格式一致的片段無需重新編碼即可拼接。在瀏覽器中執行，無需上傳。
將檔案拖放到此處或點選瀏覽
MP4, WebM, MOV, AVI, MKV, M4V · 無強制大小限制
或按 Ctrl+V 從剪貼簿貼上
你可以一次拖放多個檔案
你的檔案永遠不會離開你的裝置。所有處理都在你的瀏覽器中本地進行。
工作原理
Joins several video clips into one MP4, in the order you choose, with the FFmpeg engine running in your browser. Clips of different sizes or shapes are fitted into one frame with black bars instead of being stretched or cropped.
- 1Add and order your clipsDrop in MP4, MOV, WebM or MKV files, then drag them or use the up/down arrows to set the order. Tap a thumbnail to preview a clip.
- 2Each clip is checkedFFmpeg (WebAssembly, ~31 MB, downloaded once and cached) reads every clip's codec, frame size, frame rate and audio format. Nothing is uploaded.
- 3Matching clips are joined as-isWhen every clip shares the same codec, size, frame rate and audio (e.g. several clips from one phone), they are joined by stream copy with FFmpeg's concat demuxer — no re-encoding and no quality loss.
- 4Mixed clips are re-encoded to one frameOtherwise each clip is scaled to fit the output size (same as the first clip, 1080p or 720p), padded with black bars, set to one frame rate and encoded to H.264 with AAC audio. Clips without sound get silence so the audio stays in sync.
Your videos are read directly from your device by the in-browser engine and the merged MP4 is built in memory. No clip is ever uploaded to a server.