How do I convert audio to video?
Upload your audio file and ZinAIStudio does the rest automatically: it transcribes the speech, matches every sentence to relevant stock footage, burns in timed subtitles, and exports a finished MP4 with your original audio on top — no video editor needed.
What is an audio to video converter?
An audio to video converter turns a sound-only file like MP3 or WAV into a video file (MP4) that platforms like YouTube, Instagram, and TikTok can actually play, since none of them accept audio-only uploads. ZinAIStudio goes further than a basic wrapper — it adds matching stock footage and burned-in subtitles instead of a static image.
どの音声形式に対応していますか？
MP3、WAV、M4Aファイルに対応しています。最大ファイルサイズは50MBです。
Does converting audio to video reduce audio quality?
No. Your original audio track is preserved and layered onto the final MP4 without extra lossy re-encoding, so there is no audible quality loss — the same voice recording, just wrapped in a video file with visuals and subtitles.
文字起こしの精度はどのくらいですか？
Accuracy is typically 90%+ for clear English audio. You can edit the transcript before generating the video.
How much stock footage is available?
We pull from a library of over 3 million free, commercially-licensed clips.
生成後に動画を編集できますか？
はい。生成後、個々のシーンクリップを交換し、再レンダリングし、更新された動画をダウンロードできます。
Can I post the video on YouTube, Instagram, or TikTok?
Yes. The exported MP4 has no watermark and all stock footage is licensed for commercial use, so you can publish it on any platform or use it in ads.
本当に無料ですか？
はい — アカウントを作成して無料で動画を生成しましょう。