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• How To create mosaic with live stream with ffmpeg ( or with xuggle )

  20 septembre 2013, par Emre Karataşoğlu

  For a thousand minutes I try to find a way that stream multiple video and combine them into a one output . I wanna do that with ffmpeg or xuggler with ffmpeg cmd.
  VirtualDub and avis couldn't meet my needs. Actually I couldn't find a way stream in avis . I can only make 4 8 16 videos in a screen on virtualdub but they are local videos and not my issue .

  >cd c:\f\bin 

  ffmpeg -i rtmp ://localhost/live/me -vf "[in] scale=iw/2:ih/2, pad=2*iw:ih [left] ; movie=other stream, scale=iw/4:ih/4 [right] ; [left][right] overlay=main_w/2:0 [out]" -b:v 768k output

  anyway join two stream side by side , but I want more .
  Is it possible with ffmpeg ? Also
  I cant use the program like spycam ,vlc etc . Don't say to me vlc , console vlc can easily do it .

• FFmpeg converted mp4 file fails to load in Quicktime

  21 décembre 2015, par wonea

  I’ve been using FFmpeg to convert a movie I need to play in MP4, however in Quicktime the following error is presented ;

  

  (Error -2041 : an invalid sample description was found in the movie (output.mp4)).

  I used the following FFmpeg command parameters to convert the file ;

  C :\Temp\EOBTemp>ffmpeg -i input.mp4 -y
  -acodec libmp3lame -ab 96k -vcodec libx264 -vpre lossless_slow -crf 22
  -threads 0 output.mp4

  Now this file plays absolutely fine, in Windows Media Player, and VideoLAN (FFmpeg based, so no surprise here. I using the latest build from HawkEye’s FFmpeg Windows Builds
  (FFmpeg git-a304071 32-bit Static (Latest)).

  I really hope this isn’t a AAC problem, as I’ve been trying to get FFmpeg to use the libfaac.dll library (in the same folder as the FFmpeg.exe) with the command ;

  -acodec libfaac

  Help ! I’m at a loss !

• FFmpegPHP get thumbnail from external URL

  22 janvier 2013, par jValdron

  I'm trying to create thumbnails from external videos, mostly MP4s and FLVs. I'm using FFmpegPHP. I already have the thumbnail generation working fine, however, I need to load the video entirely on my server first. Would it be possible to stream only a small part of the video then extract the thumbnail from that ?

  Here's the code I have so far :

  require_once PRIV . 'Vendor/FFmpegPHP/FFmpegAutoloader.php';
  
  
  
  // Download the whole video.
  
  $video = file_get_contents($_PUT['video']);
  
  $file = 'path_to_cache';
  
  file_put_contents($file, $video);
  
  
  
  $movie = new FFmpegMovie($file);
  
  
  
  // Generate the thumbnail.
  
  $thumb = $movie->getFrame($movie->getFrameCount() / 2);
  
  $thumb->resize(320, 240);
  
  imagejpeg($thumb->toGDImage(), 'path_to_thumb');

  Anyone has a suggestion ?

  EDIT

  As Brad suggested, here is the updated code :

  $file = CACHE . 'moodboard_video_' . rand();
  
  $fh = fopen($file, 'w');
  
  $size = 0;
  
  
  
  curl_setopt($ch, CURLOPT_URL, $_PUT['video']);
  
  curl_setopt($ch, CURLOPT_HEADER, 0);
  
  curl_setopt($ch, CURLOPT_WRITEFUNCTION, function($ch, $data) use($fh, &$size){
  
      $length = fwrite($fh, $data);
  
  
  
      if($length === FALSE) {
  
          return 0;
  
      } else {
  
          $size += $length;
  
      }
  
  
  
      // Downloads 1MB.
  
      return $size < 1024 * 1024 * XXXXXX ? $length : 0;
  
  });
  
  
  
  curl_exec($ch);
  
  
  
  fclose($fh);
  
  curl_close($ch);
  
  
  
  // Create the thumbnail.
  
  $thumb = $movie->getFrame(XXXXXX);
  
  $thumb->resize(static::DEFAULT_THUMBNAIL_WIDTH, $thumb->getHeight() / $thumb->getWidth() * static::DEFAULT_THUMBNAIL_WIDTH);
  
  $image = $thumb->toGDImage();
  
  imagejpeg($image, PRIV . static::THUMBNAILS_PATH . $item->getLastInsertIdentifier() . '_' . static::DEFAULT_THUMBNAIL_WIDTH);