Unió de vídeos de franc

Uneix diversos clips de vídeo en un sol MP4 en l'ordre que triïs. Les mides diferents s'ajusten amb barres negres; els clips que coincideixen s'uneixen sense tornar a codificar. Funciona al navegador: sense pujar res.

Deixa els fitxers aquí o fes clic per navegar

MP4, WebM, MOV, AVI, MKV, M4V · sense límit de mida forçat

o premeu Ctrl+V per enganxar des del porta-retalls

Pots deixar múltiples fitxers alhora

Navegar pels fitxers

Els teus fitxers no surten mai del teu dispositiu. Tot el processament es fa localment al teu navegador.

Com funciona

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.

  1. 1
    Add and order your clips
    Drop 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.
  2. 2
    Each clip is checked
    FFmpeg (WebAssembly, ~31 MB, downloaded once and cached) reads every clip's codec, frame size, frame rate and audio format. Nothing is uploaded.
  3. 3
    Matching clips are joined as-is
    When 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.
  4. 4
    Mixed clips are re-encoded to one frame
    Otherwise 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.

Eines relacionades

Preguntes freqüents