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• ffmpeg encoding a video with time_base Not equal to framerate does not work in HML5 video players

  1er juillet 2019, par Gilgamesh22

  I have a time_base of 90000 with a frame rate of 30. I can generate a h264 video and have it work in VLC but this video does not work in the browser player. If I change the time_base to 30 It works fine.

  Note : I am changing the frame->pts appropriately to match the time_base.
  Note : Video does not have audio stream

  //header.h
  
  AVCodecContext *cctx;
  
  AVStream* stream;

  Here is the non working example code

  //source.cpp
  
  stream->time_base = { 1, 90000 };
  
  stream->r_frame_rate = { fps, 1 };
  
  stream->avg_frame_rate = { fps, 1 };
  
  
  
  cctx->codec_id = codecId;
  
  cctx->time_base = { 1 ,  90000 };
  
  cctx->framerate = { fps, 1 };
  
  
  
  // ...... 
  
  // add frame code later on timestamp are in millisecond
  
  frame->pts = (timestamp - startTimeStamp)* 90;

  Here is the working example code

  //source.cpp
  
  stream->time_base = { 1, fps};
  
  stream->r_frame_rate = { fps, 1 };
  
  stream->avg_frame_rate = { fps, 1 };
  
  
  
  cctx->codec_id = codecId;
  
  cctx->time_base = { 1 ,  fps};
  
  cctx->framerate = { fps, 1 };
  
  
  
  // ...... 
  
  //  add frame code timestamp are in millisecond
  
  frame->pts = (timestamp - startTimeStamp)/(1000/fps);

  Any ideas on why the second example works and the first does not in the HTML5 video player.

• Issue with video.js playing AES encrypted video

  2 septembre 2021, par r3dge

  I'm trying to use video.js to play an encrypted HLS video. The AES 128 encryption has been done using this method : FFmpeg video encryption

  


  Here is the html code :

  


  &#xA;    &#xA;    <source src="http://192.168.56.1/enc/prog_index.m3u8" type="application/x-mpegURL">&#xA;</source>

  
 
 
 


  Video.js is loaded using CDN :

  


  <code class="echappe-js">&lt;script src=&quot;https://unpkg.com/video.js/dist/video.js&quot;&gt;&lt;/script&gt;&#xA;&#xA;&#xA;&lt;script src=&quot;https://unpkg.com/@videojs/http-streaming/dist/videojs-http-streaming.js&quot;&gt;&lt;/script&gt;&#xA;

  


  The player is loading and appears in the browser but the video can not be played.

  


  I get two warnings in the console :

  


  video.js:159 VIDEOJS : WARN : A plugin named "reloadSourceOnError" already exists. You may want to avoid re-registering plugins !

  


  VIDEOJS : WARN : Problem encountered with playlist 0-http://192.168.56.1/enc/prog_index.m3u8. Trying again since it is the only playlist.

  


  Server side i'm using Apache with Symphony 5. The server return a HTTP 200 status for the first ts file of the video. When i press the play button of the player seems to retry downloading. It get a 200 each time but the video is not played.

  


  Update : i tried to play the same video without encryption and it works. The problem seems to be due to the encryption itself.

  


  Thanks in advance for any help on that issue.

  


• HTML5 Video Best Practice

  19 février 2018, par Artur

  I have a lot of video on my webpage. I noticed that some of them load very slowly. I think the reason is the resolution.

  How can I speed up the loading of my video ? What are your the past experience with html5 video settings ? Which video resolution, frequency rate and so on should I use ? Is there an advantage if I use a video player like VideoJS instead of default HTML5 player ?

  I would be grateful for every snippet of advice !