video audio extractorは何に適していますか?
Audio extraction saves the soundtrack from courses, meetings, or media clips as a separate file. The tool runs ffmpeg.wasm locally in the browser, and videos are not uploaded.
M4A is smaller and easier to share; WAV is better for later editing but much larger.
サポートされている形式: MP4, MOV, WebM, AVI;単一ファイルの制限: 500MB。
video audio extractorの使い方
ステップ1
Select video
Upload a video that contains an audio track.
ステップ2
Choose audio format
Choose M4A or WAV and start extraction.
ステップ3
Listen and download
Check the result in the audio player, then download it.
よくある質問
Can it extract from a video without audio?
No. If the source has no audio track, processing may fail or produce an unusable result.
What is the difference between M4A and WAV?
M4A is smaller; WAV is better for editing but larger.
Will audio be uploaded?
No. Extraction is completed locally in the browser.
テクノロジーとデータソース
- ffmpeg.wasm — Official FFmpeg project documentation for running FFmpeg in the browser.
- Comlink — Open-source RPC library for communication between the page and a Web Worker.