85% of social video is watched without sound. Longwave burns word-accurate captions directly into every clip - so your message lands whether viewers have headphones in or not.
From raw transcript to styled, burned-in captions in every clip - no SRT files, no third-party tools, no manual sync.
使用例
得られるもの
We use word-level timestamps from speech recognition or YouTube captions - each word appears exactly when it's spoken, not a second off.
Captions are sized, positioned, and styled to match modern Shorts aesthetics - bold, readable at a glance, never obstructing faces or key content.
No SRT upload, no manual sync, no caption editor. Captions are generated and burned into every clip without you lifting a finger.
We support 99 languages - if your video has spoken audio, we can transcribe and caption it.
White text with a black outline ensures captions are readable on any background - bright beaches, dark stages, or anything in between.
Captions are rendered into the video file itself - they appear everywhere: feeds, stories, embeds - no platform support required.
仕組み
YouTube captions or speech recognition produces a full word-level transcript - every word tagged with its exact start and end time in the source video.
The AI groups words into natural-reading segments that fit the screen. Font size, position (lower third), and style (Impact with outline) are applied to match pro short-form standards.
FFmpeg overlays the caption ASS/SRT stream directly onto the video pixels - permanently part of the file. The final MP4 plays with captions on any device, any platform, any player.
柔軟なワークフロー
Ship captioned clips on autopilot, or dial in the exact look and feel you want.
Captions are generated, styled, and burned into every clip without any input from you.
Choose your caption style, font, and position to match your brand.
なぜショートパンツなのか
使用量に応じた価格設定とは、1掲載につき$0.20をお支払いいただくことを意味します。購読料も上限もありません。
よくあるご質問