Kord•13mo ago

Opus stream to wav?

How can I take the incoming opus stream from a voice channel and save it as a wave file?

I have the full opus audio sample as a ByteArray, how do I actually convert this to a wav file?

g•11/27/24, 2:57 PM

Wav is just raw audio data

g•11/27/24, 2:57 PM

It's not a codec

ShaunOP•11/27/24, 2:57 PM

Okay so that's one less step at least

g•11/27/24, 2:58 PM

You just write it to file afaik

ShaunOP•11/27/24, 2:58 PM

I need to convert opus to raw audio

g•11/27/24, 2:58 PM

Yeah that's the tricky part

g•11/27/24, 2:58 PM

You'll need to interface with libopus

g•11/27/24, 2:58 PM

There must be a wrapper for it

g•11/27/24, 2:58 PM

You might need to find one though

ShaunOP•11/27/24, 2:58 PM

I think I may have one

ShaunOP•11/27/24, 2:59 PM

So I can just write the bytearray of raw audio directly to WAV?

ShaunOP•11/27/24, 2:59 PM

That's convinient

ShaunOP•11/27/24, 3:08 PM

Seems lavaplayer can do it

g•11/27/24, 3:10 PM

yeah lavaplayer/lavalink can probably do it

ShaunOP•11/27/24, 3:10 PM

I have a ByteBuffer in from Opus, and it wants a ShortBuffer out, but I'm not sure what size the output buffer should be..

viztea•11/27/24, 3:21 PM

lavaplayer probably wouldn't be a great fit here

viztea•11/27/24, 3:22 PM

you would be better off using something like https://github.com/discord-java/opus-java and interacting with libopus manually

viztea•11/27/24, 3:23 PM

or you can use something like https://github.com/bramp/ffmpeg-cli-wrapper and write the opus packets to a stream that is piped to this

GitHub

GitHub - bramp/ffmpeg-cli-wrapper: Java wrapper around the FFmpeg c...

Java wrapper around the FFmpeg command line tool. Contribute to bramp/ffmpeg-cli-wrapper development by creating an account on GitHub.

Vviztea you would be better off using something like https://github.com/discord-java/opu...

ShaunOP•11/27/24, 3:25 PM

the lavaplayer API seems simple enough

ShaunOP•11/27/24, 3:25 PM

But I'm getting errors that are just numbers lol

ShaunOP•11/27/24, 3:25 PM

Not helpful

viztea•11/27/24, 3:25 PM

well if they're opus errors

viztea•11/27/24, 3:25 PM

that's because libopus is a C library

Vviztea you would be better off using something like https://github.com/discord-java/opu...

ShaunOP•11/27/24, 3:29 PM

Not even a snippet of example code

ShaunOP•11/27/24, 3:29 PM

Why do people release libs like that

g•11/27/24, 3:30 PM

it's a binding for opus natives

g•11/27/24, 3:30 PM

you'd read the opus docs for that

g•11/27/24, 3:30 PM

also https://github.com/discord-java/opus-java/issues/5

GitHub

Is there some examples show how to use this library？ · Issue #5 · d...

viztea•11/27/24, 3:30 PM

btw lavaplayer doesn't have wav encoding stuff

viztea•11/27/24, 3:30 PM

that's why i suggested using ffmpeg instead

g•11/27/24, 3:31 PM

well I would say wav is a terrible container

g•11/27/24, 3:31 PM

you probably want something compressed

viztea•11/27/24, 3:31 PM

well regardless of container, lavaplayer is purely for decoding

ShaunOP•11/27/24, 3:32 PM

As long as it's one of these formats

g•11/27/24, 3:32 PM

ogg probably

ShaunOP•11/27/24, 3:33 PM

Isn't ogg related to opus?

g•11/27/24, 3:33 PM

viztea•11/27/24, 3:33 PM

i'd go for mkv or mp4

g•11/27/24, 3:33 PM

it's ogg vorbis

viztea•11/27/24, 3:33 PM

ogg has opus and flac support

g•11/27/24, 3:33 PM

mkv or mp4 for audio? god no

viztea•11/27/24, 3:33 PM

:clueless:

viztea•11/27/24, 3:33 PM

ogg is a terrible audio format

g•11/27/24, 3:33 PM

it's a fine and common one

ShaunOP•11/27/24, 3:34 PM

ogg is good no?

viztea•11/27/24, 3:34 PM

it's good for streaming

ShaunOP•11/27/24, 3:34 PM

Are you just a hater

viztea•11/27/24, 3:34 PM

but that's about it

g•11/27/24, 3:34 PM

it's not proprietary unlike any of the m- formats

viztea•11/27/24, 3:34 PM

if you want a lightweight format, ogg is fine though