WebM 轉 M4V轉換工具
A free WebM to M4V converter for WebM files. Browser-based pairs here usually run in this tab, with no file upload.
把你的 WebM 檔案拖曳到這裡
or 瀏覽你的裝置 · 貼上快捷鍵 Ctrl+V
Accepts .webm files. You can queue several files; each is processed one after another on your own device.
你的檔案不會離開這台裝置——沒有上傳，也沒有伺服器可以刪除它們。
- 01
新增你的 WebM 檔案
把檔案拖放到上方的方框，或點擊以瀏覽選取。檔案會直接從磁碟讀取——不會傳送到任何地方。
- 02
檢查設定
M4V is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
下載你的 M4V
按下轉換，等待該列完成即可。若轉換多個檔案，可以將它們一起打包成單一 ZIP 檔下載。
WebM
WebMGoogle 為 HTML5 影片打造的免權利金容器格式，搭配 VP8 或 VP9 影片與 Vorbis 或 Opus 音訊。在相同畫質下比 H.264 版的 MP4 更小，且所有現行瀏覽器都支援。
- 開發者
- 發布年份
- 2010
- 副檔名
- .webm
- MIME 類型
- video/webm
- 壓縮方式
- 有損
- 規格文件
- 開放
M4V
iTunes VideoApple 供 iTunes 使用的 MP4 變體格式，有時會帶有 FairPlay 數位版權管理。沒有 DRM 保護的檔案實際上就等同於 MP4；副檔名主要是讓 Apple 軟體知道該如何處理它。
- 開發者
- Apple
- 發布年份
- 2005
- 副檔名
- .m4v
- MIME 類型
- video/x-m4v
- 壓縮方式
- 有損
- Both WebM and M4V are lossy formats, so repeated conversions can accumulate rounding artifacts. Keep this to only what you need and avoid repeated round-trips.
關於 WebM 轉 M4V 的常見問題
這個 WebM 轉 M4V 轉換器是免費的嗎？
是的。在這裡把 WebM 轉換為 M4V 完全免費，不需要帳號、沒有浮水印，也沒有每日次數限制。處理在你自己的裝置上完成，因此沒有需要轉嫁給你的伺服器成本。
我的 WebM 檔案會被上傳到任何地方嗎？
For browser-based pairs, your file is read locally and converted by ffmpeg in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
WebM 轉 M4V 有檔案大小限制嗎？
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
把 WebM 轉換為 M4V 會損失品質嗎？
M4V is a lossy format, so some detail is discarded when it is encoded. At the default quality setting the change is often not visually obvious; keep your original WebM file if you might need it again.
可以一次把多個 WebM 檔案轉換為 M4V 嗎？
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
WebM 轉 M4V 能在手機、Mac 或 Chromebook 上使用嗎？
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
將其他格式轉換為 M4V
這裡有 21 種格式可以轉換成 M4V。
將 WebM 轉換為其他格式
一個 WebM 檔案可以轉換成以下任何一種格式。