How can I combine two mp3 files with different transfer rates

Question

I have FFmpeg installed on my linux web server. When I execute the following code, I have intermittent results.

I think I realized that MP3s do not compile when they have different bitrates.

exec ('cat '. $pair['source_file'] . ' ' . $pair['translated_word_file'] . '>' . $temp_mp3);

Perhaps I found several articles on the Internet that link to them, and then combine them together with agreed bit rates.

I have confirmed that this will not work with the basic "cat" function and that sox can be used if they have the same sampling rate.

Now the question is: "What is the best way to get them at the same sample rate?"

Answer 1

ID3 MP3. MP3-. !

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: http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html

: http://mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm

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Answer 2

mp3, . .