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• correct way to download a mp4 [Audio only] file as a mp3 file via php

  3 février 2018, par Kapil

  I am asking this question because i found it impossible as far my knowledge stands. However i believe here on stackoverflow a lot of genius persons visits so maybe someone can give a good advice / trick.

  My problem is, I am downloading a audio/mp4 file of youtube hosted on googlevideo.com’s server.

  My PHP code for this purpose :
  $mp3path is url of video

  header('Content-Description: File Transfer');
  
  if(strpos($mp3path, "https://") === false) {
  
      header('Content-length: ' . size($mp3path)); //size is custom function
  
  } 
  
      header("Content-Type: audio/MP4A-LATM, audio/MP4A, audio/m4a, audio/mp4, audio/mp4a, audio/mp4-audio, audio/mpeg"); 
  
      header('Content-Type: application/force-download');
  
      header("Accept-Ranges: bytes");
  
      header('Content-Transfer-Encoding: binary'); 
  
      header('Content-disposition: attachment; filename="'.$title.'.mp3"'); 
  
      header('Connection: Keep-Alive');
  
      header('Expires: 0');
  
      header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
  
      header('Last-Modified: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
  
      header("Cache-Control: private", false);
  
      header('Pragma: no-cache');
  
      readfile($mp3path);
  
      exit;

  I can download this audio file but few mp3 players are not able to play it when i did some research on by using mp3val [mp3val.sourceforge.net]. I found this file do not contain sample-rate, bit-rate or some other required codecs inside the file.
  Error received from mp3val : Unknown file format

  I know one possible way of doing this which is ffmpeg but i am looking for a less time consuming option of doing this because first ffmpeg download the whole file and then convert it to mp3 and save it on server. It takes a lot of time.

  I am looking for a easiest solution in which, i dont want to save the whole file on my server. I want to call this file from remote server and want to add sample rate, bit-rate in the file and then just somehow with php i want to start download on browser.

  All i mean to say i need a faster solution. I have seen 2 yt to mp3 converter, They are doing the same thing, giving instant download. i dont know how ?

  Please if you think its a stupid question or not possible then dont report to stackoverflow. I am trying to figure it out that’s why i am asking this question here. I hope you’ll understand my curiosity.

  Thanks,

• Block YouTube from source page when trying to download a video with youtube-dl

  18 mars 2018, par user3108268

  E.g. example.com/1 has a video hosted, you run youtube-dl example.com/1 and it all works fine, the video gets downloaded.

  E.g. example.com/2 also has a video, but it also has a YouTube trailer. If you run youtube-dl example.com/2 the hosted video gets completely ignored and only YouTube trailer gets downloaded.

  From what I see in the log is that the wanted local video playlist gets downloaded first and then ignored by getting overwritten by embedded YouTube playlist download.

  You can’t even get the url with --get-url or get format with --list-formats. It always prints the googlevideos URL for the YouTube trailer and lists only the YouTube trailer formats.

  I did manage to pull out the local video URL via --dump-pages and decoding the base64 encoded source. But the problem is that the URL contains a unique token each time the page example.com/2 is called, so passing the unique one-time video URL like e.g. example.com/2/video.php ?token=asdf to youtube-dl won’t download the video.

  So I figured somehow I need to bypass the YouTube trailer source and playlist when calling youtube-dl example.com/2 and trying to download local video and not the YouTube trailer.

• amfenc : Do not automatically download/upload unknown hardware input frames

  14 avril 2018, par Mark Thompson

  amfenc : Do not automatically download/upload unknown hardware input frames
  Supplying a hardware input frame which is not in the input hardware frames
  
  context is not allowed by the API, so additional code to handle it is not
  
  necessary.  Further, handling it automatically results in very low
  
  performance - it is more appropriate to fail immediately so that the user
  
  can fix their incorrect setup.
  

  • [DH] libavcodec/amfenc.c