Question

I have three 3gp file,and I use sox to combine them

sox --combine sequence C:\1.3gp C:\2.3gp C:\3.3gp C:\newaudio.3gp

but It’s show that “FAIL formats:no handler for file extension 3gp“

Its means that I have to install some extension?

I’m trying to do it with sox,Can anybody give me any suggestions ?

Or It’s possible do it with ffmpeg ?

Answer 1

3gp is a multimedia container and not supported by sox.

You can extract the audio with ffmpeg and further process it with sox although ffmpeg can also do a lot of audio processing.

Here’s one way to convert the data to wav, concatenate and convert back to 3gp:

ffmpeg -i 1.3gp 1.wav
ffmpeg -i 2.3gp 2.wav
ffmpeg -i 3.3gp 3.wav

Concatenate, maybe other things with sox (sequence is default so no need to specify):

sox 1.wav 2.wav 3.wav long.wav

Convert back to 3gp:

ffmpeg -i long.wav newaudio.3gp