M4A 和 AAC 音频文件有什么区别? [英] What is the difference between M4A and AAC Audio Files?

问题描述

M4A 音频文件和 AAC 音频文件之间有什么区别吗?相同的东西，但文件扩展名不同?

Is there any difference between M4A audio files and AAC audio files or are they exactly the same thing but with a different file extension?

推荐答案

.M4A 文件通常只包含音频并被格式化为 MPEG-4 Part 14 文件 (.MP4> 容器).

.M4A files typically contain audio only and are formatted as MPEG-4 Part 14 files (.MP4 container).

.AAC 不是容器格式，而是带有编码音频流的原始 MPEG-4 Part 3 比特流.

.AAC is not a container format and instead it is a raw MPEG-4 Part 3 bitstream with audio stream encoded.

请注意，M4A 不必完全包含 AAC 音频，还有其他有效选项.

Note that M4A does not have to contain exactly AAC audio, there are other valid options as well.

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