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• Enable Quality Selector Control in Angular Using Video.js

  22 juillet, par Abhay Singh

  I am using Video.js in an Angular 19.1.3 application, with version 8.21.0 of Video.js. I have successfully set up an HLS stream using a master index.m3u8 file, and the player automatically switches to lower quality segments when the network is slow, and to higher quality when the network is good. This part works as expected.

  


  However, I would like to add a manual quality selection option to allow users to choose the video quality themselves. Despite trying several plugins (such as videojs-hls-quality-selector and videojs-contrib-quality-levels), I haven't been able to get it working.

  


  Can anyone guide me on how to implement this feature in Video.js, ensuring that the quality selector is available for manual selection ?

  


  Below is my Components code -

  


  import {AfterViewInit, Component} from '@angular/core';
import videojs from 'video.js';
import '@videojs/http-streaming';
import 'video.js/dist/video-js.css';

@Component({
  selector: 'app-home',
  imports: [],
  templateUrl: './home.component.html',
  styleUrl: './home.component.css'
})
export class HomeComponent implements AfterViewInit {
  
  ngAfterViewInit(): void {
    const player = videojs('my-video', {
      autoplay: false,
      controls: true,
      preload: 'auto',
      fluid: true,
      aspectRatio: '16:9',
    })
  
  }
}


  


  Below is my HTML code -

  


  <video class="video-js vjs-default-skin" controls="controls">&#xA;    <source src="https://localhost:7063/videos/no1lvswh.zdw.mkv/index.m3u8" type="application/x-mpegURL">&#xA;  </source></video>  &#xA;

  


• export .ogg audio packets with ffmpeg

  15 décembre 2020, par badcode

  My purpose is to read a simple .ogg file from disk and export all the audio packets to disk again as multiple .ogg files.

  


  


  // creating AVIOContext (main)

  


  


          AVIOContext avio = avio_alloc_context(new BytePointer(av_malloc(BUFFER_SIZE)), 
        BUFFER_SIZE, 1, outputFormatContext, null, writeCallback, null);
        outputFormatContext.pb(avio);
        ret = avformat_write_header(outputFormatContext, (AVDictionary)null);

       


  


  


  // reading packets and write them to disk

  


  


   AVPacket pkt = new AVPacket();
    while (av_read_frame(inputFormatContext, pkt) >= 0) 
    {
        
        ret = av_write_frame(outputFormatContext, pkt);
        if (ret != 0) {
            System.out.println("Write frame is failed ");
        }
        
        av_packet_unref(pkt);
    }


  


  


  and finally, this is my callback function :

  


  


  static int BUFFER_SIZE = 8192;
    static class WriteCallback extends Write_packet_Pointer_BytePointer_int {
        @Override public int call(Pointer opaque, BytePointer buf, int buf_size) {
            try {
                
                File dir = new File("audio_parts");
                if (!dir.exists()) {
                    dir.mkdir();
                }
                
                FileOutputStream fos = new FileOutputStream(dir.getAbsolutePath() + "/audio_file_part" + fileCount);
                                
                byte[] b = new byte[buf_size];
                buf.get(b, 0, buf_size);
                fos.write(b, 0, buf_size);
                
                fos.close();
                fileCount++;
                return buf_size;
            }
            catch (Throwable t) {
                System.err.println("Error on OutputStream.write(): " + t);
                return -1;
            }
        }
    }

    static WriteCallback writeCallback = new WriteCallback();


  


  Actually, this code is working well but I have some problems with packets. I wanted to export each packet one by one, but for the test.ogg the callback function is called for every 50 packets(50 packets=1 second), and this number changes for other audio files.

  


  How can I control the callback and is it possible to extract sound packets one by one as a .ogg file.

  


• Android - ffmpeg ignore loop after export

  1er juin 2017, par NewUser

  Good day all. I am currently using this FFMPEG library. Here is the command I am running

  String[] s = {"-i" ,mVideoUri.toString(),"-i",newBackgroundBitmap.getPath(),"-filter_complex","[1:v][0:v]scale2ref=iw:ih[ovr][base];[ovr]colorchannelmixer=aa=0.7[ovrl];[base][ovrl]overlay[v]","-map","[v]","-c:v","libx264","-preset","ultrafast",directoryToStore+"/"+lastSaved+mp};
  
  
  
  //mVideoUri.toString() is the selected video
  
  //newBackgroundBitmap.getPath() is a drawn bitmap

  mMediaPlayer also has anchor/loop control points, to ’loop’ the video.(shown in the image below)

  Everything works perfectly, the video is saved perfectly as I suspected.

  But here is where the problem comes, after I saved the video and try to use that video in ANY (even my) editing application, the starting point is messed up, it is hard to put it in words, so here is a image.video control points after export

  REMEMBER THIS ONLY HAPPENS AFTER I EXPORTED THE VIDEO

  ---

  The problem is definitely caused by ffmpeg or ffmpeg command. I have tried forcing the start and end control points ;

  private Runnable updateVideoTime = new Runnable() {
  
      public void run() {
  
  
  
          if (!Activity.this.mMediaPlayer.isPlaying()) {
  
              Activity.this.mMediaPlayer.seekTo(Activity.this.leftPosition);
  
              Activity.this.mMediaPlayer.start();
  
          }

  ---

  No matter what I try I can’t stop the ’progressBar’ from ignoring the starting loop. It could perhaps be the fact that the ffmpeg used in the library is out of date ?

  Has anyone who used ffmpeg(or this library) before dealt with this issue ?

  Any help would be appreciated.