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• Get 'creation_time' of video using ffmpeg and regex

  5 février 2014, par Foysal

  I have a metadata text of a video file which is produced by ffmpeg.

  Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2011-09-10 21:44:22
  
      model           : iPhone 4
  
      model-deu       : iPhone 4
  
      encoder         : 4.3.5
  
      encoder-deu     : 4.3.5
  
      date            : 2011-09-10T17:44:22-0400
  
      date-deu        : 2011-09-10T17:44:22-0400
  
      location        : +40.7329-073.9864/
  
      location-deu    : +40.7329-073.9864/
  
      make            : Apple
  
      make-deu        : Apple

  I want to get the *'creation_time'* value using regex of the above text. I am using C#.

• How to use LivuLib with Xcode project

  13 avril 2015, par Vishal Lohia

  I need to publish the live video from iphone camera to wowza server. During search I found, that this might be possible with LivuLib library. But don’t know how to use this. Anyone have any idea on this or other alternative way to achieve this.

  Thanks in advance..

• Is there a way to work with fluent-ffmpeg library for audio encoding (webm to wav/mp3) in Angular 2+ ?

  24 avril 2019, par binarysynthesis

  So i’m using Browser media objects to record audio using microphone for speech to text transcription. The recorded media gives me a blob/file which is in webm format. I want to convert the blob/file to wav or mp3 format which will be sent to AWS S3 Storage from where i intend to use the AWS Transcribe (Speech to Text) service to pick up the file and produce a transcript of the speech. AWS Transcribe doesn’t support webm format due to which i need to encode the audio on the client side to either wav or mp3. I’m trying to use the fluent-ffmpeg (third-party) [https://www.npmjs.com/package/fluent-ffmpeg] npm library to accomplish that but i keep getting the following error in the Typescript compiler when building using ng serve. I have already tried using the RecorderJS and the WebAudioRecoderJS npm libraries and i get the same ’Module not found’ error. -

  ERROR in ./node_modules/fluent-ffmpeg/index.js
  
  Module not found: Error: Can't resolve './lib-cov/fluent-ffmpeg' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/ffprobe.js
  
  Module not found: Error: Can't resolve 'child_process' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/processor.js
  
  Module not found: Error: Can't resolve 'child_process' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/utils.js
  
  Module not found: Error: Can't resolve 'child_process' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/recipes.js
  
  Module not found: Error: Can't resolve 'fs' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/capabilities.js
  
  Module not found: Error: Can't resolve 'fs' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/processor.js
  
  Module not found: Error: Can't resolve 'fs' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/isexe/index.js
  
  Module not found: Error: Can't resolve 'fs' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\isexe'
  
  ERROR in ./node_modules/isexe/windows.js
  
  Module not found: Error: Can't resolve 'fs' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\isexe'
  
  ERROR in ./node_modules/isexe/mode.js
  
  Module not found: Error: Can't resolve 'fs' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\isexe'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/utils.js
  
  Module not found: Error: Can't resolve 'os' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/recipes.js
  
  Module not found: Error: Can't resolve 'path' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/fluent-ffmpeg.js
  
  Module not found: Error: Can't resolve 'path' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/capabilities.js
  
  Module not found: Error: Can't resolve 'path' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/processor.js
  
  Module not found: Error: Can't resolve 'path' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/options/misc.js
  
  Module not found: Error: Can't resolve 'path' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib\options'
  
  ERROR in ./node_modules/which/which.js
  
  Module not found: Error: Can't resolve 'path' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\which'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/recipes.js
  
  Module not found: Error: Can't resolve 'stream' in 'C:\Users\banshuman\Desktop\AWS-Transcribe-Angular\aws-transcribe-angular\node_modules\fluent-ffmpeg\lib'
  
  i ｢wdm｣: Failed to compile.

  I am using Angular 7.2.0 and TypeScript 3.2.4.
  I have also installed the type definitions for fluent-ffmpeg [https://www.npmjs.com/package/@types/fluent-ffmpeg] within the node_modules to specify the typings for TypeScript.
  Below is my angular component file where i have implemented the audio recording functionality in the Browser -

  /// <reference types="@types/dom-mediacapture-record"></reference>
  
  import { Component } from '@angular/core';
  
  import * as aws from 'aws-sdk';
  
  import * as TranscribeService from 'aws-sdk/clients/transcribeservice';
  
  import * as Ffmpeg from 'fluent-ffmpeg';
  
  
  
  @Component({
  
    selector: 'app-root',
  
    templateUrl: './app.component.html',
  
    styleUrls: ['./app.component.css']
  
  })
  
  export class AppComponent {
  
  
  
    speechToText() {
  
  
  
      console.log(Ffmpeg);     
  
  
  
      // Begin streaming audio
  
      navigator.mediaDevices.getUserMedia({ audio: true })
  
        .then(stream => {
  
          const mediaRecorder = new MediaRecorder(stream);
  
          // Start recording audio
  
          mediaRecorder.start();
  
  
  
          const audioChunks = [];
  
          // When recording starts
  
          mediaRecorder.addEventListener("dataavailable", event => {
  
            audioChunks.push((<any>event).data);
  
          });
  
  
  
  
  
          // When recording stops
  
          mediaRecorder.addEventListener("stop", () => {
  
            const audioBlob = new Blob(audioChunks, { type: 'audio/webm;codecs=opus' });
  
            const audioFile = new File([audioBlob], 'outputAudioFile');
  
            const audioUrl = URL.createObjectURL(audioBlob);
  
  
  
  </any>

  I’m not posting the entire component code as the rest is part of the AWS SDK and is irrelevant to the problem statement. I need to convert the audioBlob or the audioFile which are currently in the webm format to wav or mp3 for uploading to the AWS services. How can i achieve that in Angular using the ffmpeg library ? I’m open to other solutions as well and not just ffmpeg to get the job done on the client side.