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• Problem to convert Mp4 to MPEG DASH with FFMPEG codec Vp9 in linux

  4 mars 2020, par Sean Pribadi

  i need to convert mp4 to mpeg Dash and stream .Mpd with dash.js. everything looks fine on windows, but there are trouble when i generate Mpd in linux.
  Step by step in windows :
  1. run

  ffmpeg -y -i video.mp4 -map 0:0 -map 0:0 -map 0:1 -c:v libvpx-vp9 -b:v:0 800k -b:v:1 200k -s:v:1 320x170 -bf 1 -keyint_min 120 -g 120 -sc_threshold 0 -b_strategy 0 -use_timeline 1 -use_template 1 -adaptation_sets "id=0,streams=v id=1,streams=a" -f dash config.mpd

  2. stream config.mpd, init, and chunk file with dash.js player.
     everything work when i run ffmpeg on windows

  when i ran on linux :
  1. run

  ffmpeg -y -i video.mp4 -map 0:0 -map 0:0 -map 0:1 -c:v libvpx-vp9 -b:v:0 800k -b:v:1 200k -s:v:1 320x170 -bf 1 -keyint_min 120 -g 120 -sc_threshold 0 -b_strategy 0 -use_timeline 1 -use_template 1 -adaptation_sets "id=0,streams=v id=1,streams=a" -f dash config.mpd

  no error and everything looks good. But when i stream with dash.js.
  

  2. stream with dash.js player
     when i stream config.mpd with dash.js player, there are infinity request enter image description here

  what i have tried :
  1. change init-stream build by linux with init-stream build by windows [Work]
  2. change codec to libx264 [also work in linux]

  the problem is just convert video to MPEG dash with webm codec (vp8/Vp9) in linux

• Enable Quality Selector Control in Angular Using Video.js

  3 février, 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;

  


• ffmpeg play raw h264 stream, dts/pts problem

  29 mars 2019, par LoganMia

  I need to use ffmpeg to play the raw h264 stream, but there is no dts/pts inside, there is a timestamp

  void h264_decode(void *h264_buffer, int buflen, double timestamp) {
  
      ...
  
      AVStream * st = ic->streams[pkt->stream_index]; //video stream
  
      double duration_s = av_q2d(st->time_base);
  
      double duration = duration_s / av_q2d(st->time_base);
  
      pkt_ts = pkt->dts = pkt->pts = frame_index * duration; // no B frame
  
      ...
  
   }

  But the playback speed is too slow,
  How can I use timestamp to set pts/dts correctly ?
  Thanks .