How to use it
- Choose two or more video files (you can add more later).
- Put them in order with ↑ and ↓, or remove one with ×.
- Choose the frame size and whether to keep the sound.
- Press Merge videos, wait while it records, then download.
How it works
The clips are played one after another into one canvas. Each frame is scaled to fit the canvas without cropping and centred on black. The canvas and the clips’ sound are recorded with MediaRecorder; between clips the recorder is paused while the next file loads, so there is no gap.
Worked example
Clips of 1280 × 720 (0:12) and 1920 × 1080 (0:08), with Same as the first clip: the result is 1280 × 720 and 0:20 long. The second clip is scaled down by 1280 ÷ 1920 to fit exactly, because both are 16:9.
Tips
- Clips with the same size and shape merge without bars.
- Choose Same as the largest clip to avoid shrinking the sharpest one.
- To repeat one clip several times, the video looper is quicker to set up.