What is the ffmpeg command to convert 3gp to ulaw?

Question

I am able to convert it to wav using:

ffmpeg -i audio.3pg audio.wav

but I need the command to convert it to ulaw.

Anyone?

Solution

The simplest example is:

$ ffmpeg -i input -codec:a pcm_mulaw output.wav

Refer to ffmpeg -encoders to see a list of available encoders.

Comments

[meda]

thanks, but I would like to have the ulaw extension instead, when I change the extensions I get [NULL @ 0250ef00] Unable to find a suitable output format for 'output.ulaw' output.ulaw: Invalid argument

[meda]

what do you mean, sorry I did not get it

[slhck]

@meda If you use .wav as an extension, ffmpeg automatically guesses that you want a WAV container wrapping your PCM audio. If you do not want that, and instead need raw audio data in a .ulaw file, you need to use -f mulaw to force ffmpeg to use the PCM mu-law output format.

[meda]

Ok that worked, eventhough the quality is terrible, thanks anyway