.mp4 — MPEG-4 Video
Moving Picture Experts Group · 2001
.mp4ファイルとは?
MP4 (MPEG-4 Part 14) is the most popular video container format in the world. It can store video, audio, subtitles, and still images in a single file. MP4 typically uses H.264 or H.265 video codecs with AAC audio, delivering excellent quality at relatively small file sizes. It is the standard format for online video streaming, social media uploads, and digital video storage.
.mp4ファイルを開くプログラム
| プラットフォーム | プログラム | ||
|---|---|---|---|
| Windows | VLC Media Player | 無料 | |
| Windows Media Player | 無料 | 公式 | |
| PotPlayer | 無料 | ||
| macOS | QuickTime Player | 無料 | 公式 |
| VLC Media Player | 無料 |
.mp4ファイルのよくある問題
よくある質問
.mp4 files can be opened with several programs. VLC Media Player is one of the most popular choices.
Generally yes, .mp4 files are safe to open with appropriate software.
Yes, there are many online and offline tools available to convert .mp4 files. Check the conversion section above for specific methods.
技術詳細
MPEG-4 Video files use the video/mp4 MIME type and were first introduced in 2001 by Moving Picture Experts Group. The file can be identified by its signature: 66 74 79 70 (ftyp).