How to Convert MPEG to WAV? Click the “Choose Files” button to select your MPEG files. Click the “Convert to WAV” button to start the conversion. When the status change to “Done” click the “Download WAV” button. See the FFmpeg H.264 Video Encoding Guide for more info on that. Get a recent ffmpeg. Go to the FFmpeg Download page and get a build there. There are options for Linux, OS X, and Windows. Or you can follow one of the FFmpeg Compile Guides. Because FFmpeg development is so active it is always recommended that you use the newest version that is I am using python with pyav, ffmpeg to decode mp3 in the memory. I know there is some other way to do it, like the pipe ffmpeg command. However, I would like to explore pyav and ffmpeg API. So I have the following code. It works but the sound is very noisy, although hearable: ffmpeg -f mulaw -ar 8000 -ac 1 -i out.ulaw mulaw_decoded.wav Then upsampled the audio from 8k->16k and play it with vlc: ffmpeg -i mulaw_decoded.wav -ar 16000 upsampled.wav && vlc upsampled.wav But it plays at half speed. Ultimately I'd like to do it all in rust or go, but I can't even get it working locally with just ffmpeg. Thanks in advance. When converting to .aac from a source in m4a/mp4, you don't even need to re-encode: ffmpeg -i input.m4a -c:a copy output.aac. Note: FFmpeg tries to guess the output format from the output file name. If you need to force the format for ADTS (.aac file), use -f adts (e.g. when working with piped streams instead of files): 1. ffmpeg -i filename.opus -ab 320k newfilename.mp3. This command will convert an opus file to an mp3 file at 320 kbps bit rate. So far, so good. But if we take a look at the file, we do not get any of the metadata across into the mp3 (although the artwork is transferred). Now, if we were using another format (e.g. FLAC) we can do: 1 Answer. Sorted by: 10. Gyan 's comment is what I want, here is the full command line: ffmpeg -i in.m4a -ac 1 -ar 22050 -c:a libmp3lame -q:a 9 out.mp3. with the option for VBR encoding. The number after -q:a specifies encoding quality (bitrate), with 0 being the best quality (largest file) and 9 being the worst quality (smallest file). I developing android application, Where I've asked to record the calls and convert them to WAVE(.wav) format and send to server. I am able to successfully record and save the audio in my mobile. The recorded file mime type is 3gpp, now I want to convert this 3gpp file to wav. I tried using FFMPEG but unable to convert it. e1h1GhX.