Sur d’autres sites (5306)

• Anomalie #3407 (Nouveau) : La colonne "extension" est vide concernant certaine url distante

  12 mars 2015, par Franck Dalot

  Bonjour :-)

  SPIP 3.1.0-alpha [21937] (neuf et vierge)
  Php 5.6.6
  prefix des tables : spipdev25
  Installation faite en MySQL

  Si je vais dans ecrire/ ?exec=documents&ajouter=oui que je clique sur "internet" que je fait un copier/coller d’une adresse youtube comme :
  https://youtu.be/_h1N8MDaVXA
  Puis, je clique sur "choisir", le doc n’est pas visible sous l’onglet "autres" de la médiathèque
  L’unique chose qui montre bien, que le doc est dans la base de données, est que l’onglet "autres" s’affiche "Autres (1)"
  Dans la base de données, la colonne "extension" est vide concernant ce doc
  Je vois rien dans les logs :-(
  L’unique chose qui m’apparait, ce sont trois notices, donc, je doute que que cela soit le problème
  Notice : Undefined index : extension in /.../ecrire/inc/distant.php on line 942
  Notice : Undefined index : extension in /.../plugins-dist/medias/action/ajouter_documents.php on line 120
  Notice : Undefined index : extension in /.../plugins-dist/medias/action/ajouter_documents.php on line 188

  A savoir que cela me fait pareil, avec l’adresse :
  https://www.youtube.com/watch?v=_h1N8MDaVXA

  Mais que cela fonctionne très bien avec cette adresse (même pas de notice) :
  http://contrib.spip.net

• Concat video files using ffmpeg in individual subfolders with shell script [closed]

  18 août 2022, par Weatherdark

  I had a Windows script that would do what I want, but I switched my server to Unraid so now I need a new script. Anyway, enough backstory.

  


  I regularly have media that is named in a style like "Videoname CD(Number).ext". They get stored in subfolders called Videoname with a different folder for each video.

  


  What I need is a script that goes through each subfolder and creates a concat.txt file with the names of each video file ending in CD(number) in it, in numerical order, that will then call ffmpeg to concat the files using the concat.txt in each subfolder, placing the video file (named after the subfolder) into a folder like /mnt/User/Pool/Finished/Videofile. Then, hopefully it will delete the concat.txt file so I know which folders are finished with a quick look.

  


  I know the ffmpeg concat options for that part, I just have no idea what to use to make sure the resulting video file is named after the subfolder it came from.

  


  I could do this in Windows (albeit in a hacky, not very pretty way), but I have no idea how to accomplish this in Linux.

  


  As an example...

  


  


  /mnt/User/Pool/Concat/10.10.2022.0034.Recording/10.10.2022.0034.Recording
CD1.mp4
/mnt/User/Pool/Concat/10.10.2022.0034.Recording/10.10.2022.0034.Recording
CD2.mp4
/mnt/User/Pool/Concat/10.10.2022.0034.Recording/10.10.2022.0034.Recording
CD3.mp4
/mnt/User/Pool/Concat/10.10.2022.0034.Recording/10.10.2022.0034.Recording
CD4.mp4
/mnt/User/Pool/Concat/10.11.2022.0254.Recording/10.11.2022.0254.Recording
CD1.mp4
/mnt/User/Pool/Concat/10.11.2022.0254.Recording/10.11.2022.0254.Recording
CD2.mp4
/mnt/User/Pool/Concat/10.11.2022.0254.Recording/10.11.2022.0254.Recording
CD3.mp4
/mnt/User/Pool/Concat/10.11.2022.0254.Recording/10.11.2022.0254.Recording
CD4.mp4

  


  Put through ffmpeg to concat, results in files

  


  /mnt/User/Pool/Finished/10.10.2022.0034.Recording.mp4

  


  /mnt/User/Pool/Finished/10.11.2022.0254.Recording.mp4

  


  


  Hopefully that makes sense.

  


  Someone closed this because it wasn't "focused enough" and didn't focus on one thing... but there is ONLY one thing that it needs to do.

  


  I have no idea what they would want me to change to fix what isn't broken, so I fundamentally am at a loss. The script just needs to search through subfolders, create a concat.txt file and send that file to ffmpeg creating the new file, named after the folder, in a new location. That is literally as focused as I can make it.

  


• On-demand and seamless transcoding of individual HLS segments

  5 janvier 2024, par Omid Ariyan

  Background

  


  I've been meaning to implement on-demand transcoding of certain video formats such as ".mkv", ".wmv", ".mov", etc. in order to serve them on a media management server using ASP.NET Core 6.0, C# and ffmpeg.

  


  My Approach

  


  The approach I've decided to use is to serve a dynamically generated .m3u8 file which is simply generated using a segment duration of choice e.g. 10s and the known video duration. Here's how I've done it. Note that the resolution is currently not implemented and discarded :

  


  public string GenerateVideoOnDemandPlaylist(double duration, int segment)
{
   double interval = (double)segment;
   var content = new StringBuilder();

   content.AppendLine("#EXTM3U");
   content.AppendLine("#EXT-X-VERSION:6");
   content.AppendLine(String.Format("#EXT-X-TARGETDURATION:{0}", segment));
   content.AppendLine("#EXT-X-MEDIA-SEQUENCE:0");
   content.AppendLine("#EXT-X-PLAYLIST-TYPE:VOD");
   content.AppendLine("#EXT-X-INDEPENDENT-SEGMENTS");

   for (double index = 0; (index * interval) < duration; index++)
   {
      content.AppendLine(String.Format("#EXTINF:{0:#.000000},", ((duration - (index * interval)) > interval) ? interval : ((duration - (index * interval)))));
      content.AppendLine(String.Format("{0:00000}.ts", index));
   }

   content.AppendLine("#EXT-X-ENDLIST");

   return content.ToString();
}

[HttpGet]
[Route("stream/{id}/{resolution}.m3u8")]
public IActionResult Stream(string id, string resolution)
{
   double duration = RetrieveVideoLengthInSeconds();
   return Content(GenerateVideoOnDemandPlaylist(duration, 10), "application/x-mpegURL", Encoding.UTF8);
}


  


  Here's an example of how the .m3u8 file looks like :

  


  #EXTM3U
#EXT-X-VERSION:6
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-INDEPENDENT-SEGMENTS
#EXTINF:10.000000,
00000.ts
#EXTINF:3.386667,
00001.ts
#EXT-X-ENDLIST


  


  So the player would ask for 00000.ts, 00001.ts, etc. and the next step is to have them generated on demand :

  


  public byte[] GenerateVideoOnDemandSegment(int index, int duration, string path)&#xA;{&#xA;   int timeout = 30000;&#xA;   int totalWaitTime = 0;&#xA;   int waitInterval = 100;&#xA;   byte[] output = Array.Empty<byte>();&#xA;   string executable = "/opt/homebrew/bin/ffmpeg";&#xA;   DirectoryInfo temp = Directory.CreateDirectory(System.IO.Path.Combine(System.IO.Path.GetTempPath(), System.IO.Path.GetRandomFileName()));&#xA;   string format = System.IO.Path.Combine(temp.FullName, "output-%05d.ts");&#xA;&#xA;   using (Process ffmpeg = new())&#xA;   {&#xA;      ffmpeg.StartInfo.FileName = executable;&#xA;&#xA;      ffmpeg.StartInfo.Arguments = String.Format("-ss {0} ", index * duration);&#xA;      ffmpeg.StartInfo.Arguments &#x2B;= String.Format("-y -t {0} ", duration);&#xA;      ffmpeg.StartInfo.Arguments &#x2B;= String.Format("-i \"{0}\" ", path);&#xA;      ffmpeg.StartInfo.Arguments &#x2B;= String.Format("-c:v libx264 -c:a aac ");&#xA;      ffmpeg.StartInfo.Arguments &#x2B;= String.Format("-segment_time {0} -reset_timestamps 1 -break_non_keyframes 1 -map 0 ", duration);&#xA;      ffmpeg.StartInfo.Arguments &#x2B;= String.Format("-initial_offset {0} ", index * duration);&#xA;      ffmpeg.StartInfo.Arguments &#x2B;= String.Format("-f segment -segment_format mpegts {0}", format);&#xA;&#xA;      ffmpeg.StartInfo.CreateNoWindow = true;&#xA;      ffmpeg.StartInfo.UseShellExecute = false;&#xA;      ffmpeg.StartInfo.RedirectStandardError = false;&#xA;      ffmpeg.StartInfo.RedirectStandardOutput = false;&#xA;&#xA;      ffmpeg.Start();&#xA;&#xA;      do&#xA;      {&#xA;         Thread.Sleep(waitInterval);&#xA;         totalWaitTime &#x2B;= waitInterval;&#xA;      }&#xA;      while ((!ffmpeg.HasExited) &amp;&amp; (totalWaitTime &lt; timeout));&#xA;&#xA;      if (ffmpeg.HasExited)&#xA;      {&#xA;         string filename = System.IO.Path.Combine(temp.FullName, "output-00000.ts");&#xA;&#xA;         if (!File.Exists(filename))&#xA;         {&#xA;            throw new FileNotFoundException("Unable to find the generated segment: " &#x2B; filename);&#xA;         }&#xA;&#xA;         output = File.ReadAllBytes(filename);&#xA;      }&#xA;      else&#xA;      {&#xA;         // It&#x27;s been too long. Kill it!&#xA;         ffmpeg.Kill();&#xA;      }&#xA;   }&#xA;&#xA;   // Remove the temporary directory and all its contents.&#xA;   temp.Delete(true);&#xA;&#xA;   return output;&#xA;}&#xA;&#xA;[HttpGet]&#xA;[Route("stream/{id}/{index}.ts")]&#xA;public IActionResult Segment(string id, int index)&#xA;{&#xA;   string path = RetrieveVideoPath(id);&#xA;   return File(GenerateVideoOnDemandSegment(index, 10, path), "application/x-mpegURL", true);&#xA;}&#xA;</byte>

  


  So as you can see, here's the command I use to generate each segment incrementing -ss and -initial_offset by 10 for each segment :

  


  ffmpeg -ss 0 -y -t 10 -i "video.mov" -c:v libx264 -c:a aac -segment_time 10 -reset_timestamps 1 -break_non_keyframes 1 -map 0 -initial_offset 0 -f segment -segment_format mpegts /var/folders/8h/3xdhhky96b5bk2w2br6bt8n00000gn/T/4ynrwu0q.z24/output-%05d.ts


  


  The Problem

  


  Things work on a functional level, however the transition between segments is slightly glitchy and especially the audio has very short interruptions at each 10 second mark. How can I ensure the segments are seamless ? What can I improve in this process ?