MP4 和 MP3 是用于存储媒体的两种不同格式的数据存储类型。
MP4：
MP4 或MPEG-4 AVC(高级视频编码)是由运动图像专家组 (MPEG) 创建的文件格式。它用于存储音频、视频、静止图像、字幕和文本。
MP3：
MP3 或MPEG 音频第 3 层是一种文件格式，它也是由运动图像专家组 (MPEG) 创建的。它用于存储只能用于音频的文件。
MP4和MP3的区别：
| MP4 | MP3 |
|---|---|
| MP4 is a digital multimedia container format | Mp3 is an audio coding format |
| Extension used is .mp4 | Extension used is .mp3 |
| MP4 can handle a number of media, such as audio, image, video, text. | MP3 can handle only one type of media, which is an audio file. |
| Devices which are made for MP4 are both audio and video file players. | Devices that are made for MP3 are simply an audio file player. |
| MP4 is a compressing technology with decreasing the quality of audio an d video both. | MP3 is also a compressing technology but without decreasing the quality. |
| MP4 is extended from Apple QuickTime .mov and MPEG-4 Part 12 | MP3 is extended from MP2 |
| It is new and released in 2003. | It is released in 1994. |