sync.video

sync.video is a free set of browser tools for getting sound and picture back in step. Fix audio delay opens one video on a waveform and thumbnail timeline: press Detect automatically to match sharp sounds such as claps and slates to sudden changes in the picture, or mark the clap frame yourself, then nudge the sound in 1 ms steps and replay it at half or quarter speed. Slow drift can be measured and evened out. Export video copies the picture frame for frame, so there is no quality loss and no watermark. For shoots with a separate recorder or several cameras, Sync separate recordings matches up to eight files by their sound, then replaces, mixes or keeps the audio and can hand over an FCPXML or Premiere XML timeline. Smaller tools cover a TV delay test, a clapperboard, beat sync and subtitle timing. Your files are opened and written on your own device.