video frame captureは何に適していますか?
Video frame capture extracts a cover image, preview image, or material frame from a local video. The tool reads a selected timestamp and exports JPG or PNG with ffmpeg.wasm.
The first version uses a time input rather than a frame-by-frame picker. If the timestamp is beyond the video length, processing may fail.
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 frame captureの使い方
ステップ1
Select video
Upload the video to capture from.
ステップ2
Enter timestamp
Enter a time such as 00:00:03 and choose the image format.
ステップ3
Preview and download
Check the captured frame, then download JPG or PNG.
よくある質問
What timestamp format should I use?
Use HH:MM:SS, such as 00:00:03.
Should I choose JPG or PNG?
JPG is usually smaller; PNG is better when you need lossless image output.
Will frame capture upload my video?
No. The video is processed only in the local 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.