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libopenshot-audio | OpenShot Audio Library is a free, opensource project | Audio Utils library

 by   OpenShot C++ Version: v0.2.2 License: GPL-3.0

 by   OpenShot C++ Version: v0.2.2 License: GPL-3.0

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kandi X-RAY | libopenshot-audio Summary

libopenshot-audio is a C++ library typically used in Audio, Audio Utils applications. libopenshot-audio has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.
OpenShot Audio Library (libopenshot-openshot) is a free, open-source C++ library dedicated to delivering high quality audio editing and audio playback solutions to the world.
Support
Support
Quality
Quality
Security
Security
License
License
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kandi-support Support

  • libopenshot-audio has a low active ecosystem.
  • It has 154 star(s) with 79 fork(s). There are 21 watchers for this library.
  • There were 2 major release(s) in the last 12 months.
  • There are 1 open issues and 24 have been closed. On average issues are closed in 265 days. There are 3 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of libopenshot-audio is v0.2.2
libopenshot-audio Support
Best in #Audio Utils
Average in #Audio Utils
libopenshot-audio Support
Best in #Audio Utils
Average in #Audio Utils

quality kandi Quality

  • libopenshot-audio has no bugs reported.
libopenshot-audio Quality
Best in #Audio Utils
Average in #Audio Utils
libopenshot-audio Quality
Best in #Audio Utils
Average in #Audio Utils

securitySecurity

  • libopenshot-audio has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
libopenshot-audio Security
Best in #Audio Utils
Average in #Audio Utils
libopenshot-audio Security
Best in #Audio Utils
Average in #Audio Utils

license License

  • libopenshot-audio is licensed under the GPL-3.0 License. This license is Strong Copyleft.
  • Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.
libopenshot-audio License
Best in #Audio Utils
Average in #Audio Utils
libopenshot-audio License
Best in #Audio Utils
Average in #Audio Utils

buildReuse

  • libopenshot-audio releases are available to install and integrate.
  • Installation instructions are available. Examples and code snippets are not available.
libopenshot-audio Reuse
Best in #Audio Utils
Average in #Audio Utils
libopenshot-audio Reuse
Best in #Audio Utils
Average in #Audio Utils
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libopenshot-audio Key Features

Cross-Platform (Linux, Mac, and Windows)

Audio Playback

Audio Mixing & Resampling

Audio Plug-ins (VST & AU)

Audio Drivers (ASIO, WASAPI, DirectSound, CoreAudio, iPhone Audio, ALSA, JACK, and Android)

Community Discussions

Trending Discussions on Audio
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  • Result from audio FFT function makes it near impossible to inspect low/mid frequencies
  • Play multiple tracks <audio>
  • A problem with sound producing: How to make sound with Fourier coefficients
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  • Loading Wave File but there is random nonsense at the end of the data rather than the expected samples
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Trending Discussions on Audio

QUESTION

How to get a smaller piece of audio from larger audio captured with browser's Web Audio Api

Asked 2022-Mar-22 at 12:33

I'm making a speech-to-text tool. I'm capturing audio in real time (using Web audio api from Chrome) and sending it to a server to convert the audio to text.

I'd like to extract pieces of the whole audio cause I only want to send sentences, avoiding silences. (cause the api I use has a cost). The problem is that I don't know how to convert the whole audio into pieces.

I was using MediaRecorder to capture the audio

    // recording 

    this.recorder = new MediaRecorder(stream)
    this.recorder.ondataavailable = async (e) => {
      const buffer = await e.data.arrayBuffer()
      this.chunks.add(new Uint8Array(buffer))
    }
    this.recorder.start(1000)

Now I have in this.chunks I have an array of buffers indexed by second.
If I try to reproduce the whole audio file by passing all captured buffer, it is able to decode it and reproduce it correctly:

    // reproduce the whole audio: <- this works
    const combinedChunks = this.chunks.reduce((prev, chunk) => [...prev,...chunk], [])
    const arrChunks = new Uint8Array(combinedChunks)
    this.repAudioContext = new AudioContext()
    this.repAudioBuffer = await this.repAudioContext.decodeAudioData(
      arrChunks.buffer
    )

    this.repSourceNode = this.repAudioContext.createBufferSource()
    this.repSourceNode.buffer = this.repAudioBuffer

    this.repSourceNode.connect(this.repAudioContext.destination)
    this.repSourceNode.start()

That works ^, because I'm using all of the pieces. But since I want to extract pieces of the audio, I want to be able to select only the buffer pieces I want to reproduce. And I can't do that. If I extract the first piece of audio, it stops working and I get: decodeAudioData - Unable to decode audio data.

    // reproduce a part of the audio captured: <- this won't work
    const combinedChunks = this.chunks.slice(1).reduce((prev, chunk) => [...prev,...chunk], []) // <- skipping first chunk
    const arrChunks = new Uint8Array(combinedChunks)
    this.repAudioContext = new AudioContext()
    this.repAudioBuffer = await this.repAudioContext.decodeAudioData(
      arrChunks.buffer
    )

    this.repSourceNode = this.repAudioContext.createBufferSource()
    this.repSourceNode.buffer = this.repAudioBuffer

    this.repSourceNode.connect(this.repAudioContext.destination)
    this.repSourceNode.start()

I understand this might be because in the first chunk there are headers or other metadata of the captured audio. But can't find a way of doing this.

Can anyone give me some advice? is there a different api I should be using? What's the proper way of extracting a smaller piece of audio from a larger one that I can reproduce and save as a file?

ANSWER

Answered 2022-Mar-22 at 12:33

I've found the answer to my own question, I was using the wrong approach.

What I need to use to get the raw audio inputs and be able to manipulate them is the AudioWorkletProcessor.

This video helped me to understand the theory behind:

https://www.youtube.com/watch?v=g1L4O1smMC0

And this article helped me understand how to make use of it: https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API/Using_AudioWorklet

Source https://stackoverflow.com/questions/71470785

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install libopenshot-audio

Detailed instructions for building libopenshot and libopenshot-audio for each OS. These instructions are also available in the /docs/ source folder.
Linux
Mac
Windows

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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