mp4

.mp4 — MPEG-4 Video

Moving Picture Experts Group · 2001

開発者

Moving Picture Experts Group

カテゴリ

動画

MIMEタイプ

video/mp4

初回リリース

2001

オープンフォーマット

はい

ファイルシグネチャ

66 74 79 70 (ftyp)

.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

⚠️ Cannot open .mp4 file

Install one of the recommended programs listed above. For a free option, try the first free program in the list.

⚠️ .mp4 file is corrupted

Try re-downloading the file. If the file was transferred, ensure the transfer completed without errors.

よくある質問

What program opens .mp4 files?▼

.mp4 files can be opened with several programs. VLC Media Player is one of the most popular choices.

Is .mp4 a safe file format?▼

Generally yes, .mp4 files are safe to open with appropriate software.

Can I convert .mp4 to another format?▼

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).

豆知識

MPEG-4 Video was first released in 2001 by Moving Picture Experts Group

セキュリティ情報

.mp4 files are generally safe to open. However, always ensure your software is up to date to protect against potential vulnerabilities.