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• Revision 7050074756 : Make the api behavior conform to api spec. When no more data is available, vpx_

  1er août 2014, par Hangyu Kuang

  Changed Paths :
   Modify /test/decode_test_driver.cc

  
   Modify /vp8/vp8_dx_iface.c

  
   Modify /vp9/vp9_dx_iface.c

  
  
  Make the api behavior conform to api spec.

  When no more data is available, vpx_codec_decode should
  be called with NULL as data and 0 as data_sz.

  vpx_codec_get_frame iterates over a list of the frames
  available for display. The iterator storage should be initialized
  to NULL to start the iteration. Iteration is complete when this
  function returns NULL.

  Also change the unit test to conform to the api spec.

  Change-Id : I4b258b309f5df3d37d10c82f01492c0394181c2a

• Video processing with ffmpeg on Windows Azure

  29 août 2014, par alekz

  I am working on the project that needs to process videos that are already stored at the AzureBlob storage.

  The processing itself lookes following

  1. Grab frame with ffMpegFrameGrabber
  2. Draw some elements on top of the frame
  3. save it with the ffMpegFrameRecorder

  basicaly I have working version of this algorithm in Java (using java wrapper over native ffmpeg)

  Now I need to implement that processing with Azure Cloud Services.

  My question is
  What is a good ffmpeg wrapper for .net (console interface is not enough for my scenario) ?
  How to use it in Azure Cloud Service (sorry for noob question, but I am new to Azure) ?

• FFmpeg not working

  22 juillet 2013, par matthew

  I own the website www.goploom.com which similarly to youtube, allows users to upload and view videos. The videos that are uploaded are converted to the mp4 format for compatibility with our site's html5 video player. My problem is that while FFmpeg successfully generates video thumbnails from the uploaded video and stores the image in the proper directory, The video conversion aspect of my code does not produce any output. I have tweaked the code for a couple hours, and I have not been able to resolve this issue, however, I am told that I can perform video conversion with html, php, and ffmpeg.

  My path to ffmpeg is correct as the thumbnail generation works perfectly.

  **Information collected from the uploaded video upon upload.
  $name = $_FILES['video']['name'] ;
  $title = $_POST['videotitle'] ;
  $type = explode('.', $name) ;
  $type = end($type) ;
  $size = $_FILES['video']['size'] ;
  $random_name = rand() ;
  $tmp = $_FILES['video']['tmp_name'] ;

                  if($type != 'mp4' && $type != 'MP4' && $type != 'flv' && $type != 'FLV' && $type != 'mov' && $type != 'MOV'){
  
                      $message = "Video Format Not Supported<br />";
  
                  } else {
  
              $username_query = mysql_query("SELECT `username` FROM `users` WHERE `user_id` = $session_user_id");
  
                      $username = mysql_fetch_assoc($username_query); 
  
                      $username = $username[&#39;username&#39;];

  **Thumbnail generation that works perfectly.
  $ffmpeg = "/usr/local/bin/ffmpeg" ;
  $videoFile = $_FILES['video']['tmp_name'] ;
  $imageFile = "uploads/".$username."/thumbnails/".$random_name.".jpg" ;
  $size = "160x90" ;
  $getFromSecond = 5 ;
  $cmd = "$ffmpeg -i $videoFile -an -ss $getFromSecond -s $size $imageFile" ;
  if(!shell_exec($cmd))
  echo "Thumbnail Created !
  " ;
  else
  echo "Error Creating Thumbnail !" ;
  

  **Moves the uploaded file to its permanent directory for video conversion.
  $newFileLocation = "uploads/".$username."/temp".$random_name.".".$type ;
  move_uploaded_file($tmp, $newFileLocation) ;

  *Video Conversion code.
  $outputFile = "uploads/".$username."/".$random_name.".mp4" ;
  $databaseStoredVideoUrl = "uploads/".$username."/".$random_name.".mp4" ;
  $video_cmd = "$ffmpeg -i $newFileLocation $outputFile" ;
  echo $video_cmd ;
  if(!shell_exec($video_cmd))
  echo "Video Converted !
  " ;
  else
  echo "Error Creating Thumbnail !" ;
  

  **Properly stores the output src link in the database, but the video cannot be viewed because it does not exist.
  // Video Storage into database under correct username and user directory
  mysql_query("INSERT INTO videos VALUES('$session_user_id' ,'', '$name', '$outputFile', '$title', '', '$imageFile')") ;
  $message = "Video Upload Successful.
  " ;

  Any help or insight would be brilliant.
  Thanks.

  **EDIT : Fixed by using the following line.
  $video_cmd = "$ffmpeg -i $newFileLocation -vcodec libx264 -vpre normal -acodec libfaac $outputFile" ;

  and then inputting $video_cmd into shell_exec