MPEG音频恒定比特率转换 [英] MPEG Audio Constant bit rate conversion

问题描述

我正在尝试将一些.wav文件转换为.mp3格式

I am trying to convert few .wav files to .mp3 format

所需的.mp3格式为:

The desired .mp3 format is :

我尝试使用FFmpeg使用以下代码:

I tried with FFmpeg with this code :

ffmpeg -i input.wav -vn -ac 2 -b:a 160k output1.mp3

这是该命令以.wav格式输出的结果

This is the output of this command on one .wav format

我得到了结果，但是两件事不同整体比特率模式和写库

I am getting the result but two things are different Overall bit rate mode and Writing library

• 写作库:LAME3.99.5与LAME3.100(我认为这不应该有什么问题吗?)
• 比特率模式恒定Vs变量

如何将比特率模式从变量更改为常量?我需要使用相同的写作库进行转换吗?

How to change bit rate mode from variable to Constant? and do I need to convert using the same Writing library?

谢谢！

推荐答案

使用 ffmpeg -i input.wav -vn -ac 2 -b:a 160k output1.mp3 的输出是恒定比特率，但是ffmpeg用标题Xing编写标题，并且Mediainfo推断出该标题以指示VBR.如果您想让Mediainfo检测恒定比特率，请禁用该标头的写入.

The output using ffmpeg -i input.wav -vn -ac 2 -b:a 160k output1.mp3 is constant bit rate, however ffmpeg writes a header with the title Xing and Mediainfo infers that to indicate VBR. Disable writing that header if you want Mediainfo to detect Constant bit rate.

ffmpeg -i input.wav -vn -ac 2 -b:a 160k -write_xing 0 output1.mp3

请注意，实际的MP3编码不会更改.

Note that the actual MP3 encoding won't change.

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