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• garbled audio when streaming to youtube using ffmpeg

  27 mai 2022, par skavish

  I am having some weird audio issues streaming to youtube using ffmpeg.

  


  The same stream on facebook and twitch is fine, but on youtube it has some garbling audio issues.

  


  Here is one of those streams : https://www.youtube.com/watch?v=zat4fhwFGUI

  


  Here is ffmpeg command which was used to stream this video. I removed input, output key and inserted newlines for readability.

  


  This command is streaming to youtube (last tee), to hls (first) and to mp4 (second). hls and mp4 do not have this audio issue. Also no issues if we add another tee to stream say to facebook as well.

  


  It happens only with youtube.

  


  I would appreciate any help or ideas on what is going on there. Thank you !

  


  ffmpeg -i XXXXXXXXXX -r 30 -preset ultrafast -tune zerolatency -threads 0 -vsync 1 -map 0:v -c:v libx264 -crf 23 -g 60.0 -sc_threshold 0 -keyint_min 60.0
-pix_fmt yuv420p -map 1:a:0 -c:a:0 aac -b:a:0 128k -ac 2 -ar 44100 -aq 0 -flags +global_header
-f tee
[f=hls:var_stream_map='v:0,a:0':select='v:0,a:0':hls_time=2.0:hls_playlist_type=event:
hls_flags=independent_segments+temp_file:master_pl_publish_rate=1:hls_segment_type=mpegts:hls_segment_filename=/tmp/10311326958150343888/stream_%v_%02d.ts:
master_pl_name=master.m3u8]/tmp/10311326958150343888/stream_%v.m3u8|

/tmp/10311326958150343888/stream.mp4|

[f=fifo:fifo_format=flv:recover_any_error=0:drop_pkts_on_overflow=1:attempt_recovery=1:recovery_wait_time=1:max_recovery_attempts=100:
onfail=ignore:format_opts=flvflags=no_duration_filesize]rtmp://a.rtmp.youtube.com/live2/xxxxxxxxxxxxxxx


  


• ffmpeg is not creating screenshot from video

  1er décembre 2014, par hitesh

  I need to create a screen shot from video,

  I have followed this tutorial to do the intial setup

  1) I downloaded the ffmpeg from here -[
  http://ffmpeg.zeranoe.com/builds/ ] for 64 bit operating system.

  2) I followed the https://www.youtube.com/watch?v=gU49GiWGGAI , video and did all configuration successfully and phpinfo() shows that ffmpeg has been installed.

  3) Then I tried this to find out whether it is working or not,

  It worked successfully

  4) Next I followed this video tutorial here , but for some reason video thumbnails are not created.

  Not able to find the problem, I don’t see any error also.

  below is my code

  /**
  
   * FFMPEG-PHP Test Script
  
   *
  
   * Special thanks to http://www.sajithmr.me/ffmpeg-sample-code for this code example!
  
   * See the tutorial at http://myownhomeserver.com on how to install ffmpeg-php.
  
   */
  
  error_reporting(1);
  
  error_reporting(E_ALL ^ E_NOTICE);
  
  // Check if the ffmpeg-php extension is loaded first
  
  extension_loaded('ffmpeg') or die('Error in loading ffmpeg');
  
  
  
  // Determine the full path for our video
  
  $vid = realpath('./videos/myvideo.mp4');
  
  $videosize = filesize($vid);
  
  $remoteVideo = 'http://video-js.zencoder.com/oceans-clip.mp4';
  
  
  
  //ffmpeg
  
  
  
  $ffmpeg = dirname(__FILE__) . "\bin\\ffmpeg";
  
  $imageFile = "1.png";
  
  $image2 = "2.png";
  
  $size = "120x90";
  
  $getfromsecond = 7;
  
  $cmd = "$ffmpeg -i $vid -an -ss $getfromsecond -s $size $imageFile";
  
  $cmd2 = "$ffmpeg -i $remoteVideo -an -ss $getfromsecond -s $size $image2";
  
  if(!shell_exec($cmd)){
  
      echo "Thumbnail created";
  
  }else{
  
      echo "Error Creating thumbnail";
  
  }
  
  
  
  if(!shell_exec($cmd2)){
  
      echo "Thumbnail for remote url was created";
  
  }else{
  
      echo "Error Creating thumbnail for remote url ";
  
  }

  ---

    OUTPUT
  
      Thumbnail created
  
      Thumbnail for remote url was created

  Please help me solve this issue.

• Evolution #4391 : Squelettes de la dist : améliorer le markup et passer à BEM

  18 octobre 2019

  Une remarque en passant : dans cette vidéo de Paris Web / Corinne Durrmeyer qui présente ITCSS, https://www.youtube.com/watch?v=Qmnw5HW7VFw&t=3790s ça parle (dans les questions) de BEMIT, qui propose de préfixer les classes CSS selon l’agencement ITCSS (o- pour objet, c- pour composant, ...).

  - https://csswizardry.com/2015/03/more-transparent-ui-code-with-namespaces/ (en)
  - https://csswizardry.com/2015/08/bemit-taking-the-bem-naming-convention-a-step-further/ (en)
  - https://www.bearstudio.fr/blog/bemit (fr)