title: Silverlight 5 mediaelement won't play or even load mp4 (x264, mp3)
body: <p>Hi I've captured audio video record (from my C920 webcam) with VLC and I would like to play that video in Silverlight 5 mediaelement. I'm not sure what is wrong but Silverlight will not play my mp4 I believe the problem is with video because when I've demuxed mp4 to separate audio and video files only video did not play.</p>
  
  <p>I can play many other mp4 (h264) video files without any problem.</p>
  
  <p>Here is a link to the recorded video <a href="http://www.ulozto.net/x43rkFeW/camera-mp4" rel="nofollow">http://www.ulozto.net/x43rkFeW/camera-mp4</a></p>
  
  <p>and here is the info about mp4 from media info:</p>
  
  <pre><code>General
  Complete name                            : C:\Users\____\Documents\_Camera.mp4
  Format                                   : MPEG-4
  Format profile                           : Base Media
  Codec ID                                 : isom
  File size                                : 918 KiB
  Duration                                 : 15s 170ms
  Overall bit rate                         : 496 Kbps
  Encoded date                             : UTC 2013-09-07 20:53:33
  Tagged date                              : UTC 2013-09-07 20:53:33
  Writing application                      : vlc 2.0.8 stream output
  
  Video
  ID                                       : 2
  Format                                   : AVC
  Format/Info                              : Advanced Video Codec
  Format profile                           : High@L3.0
  Format settings, CABAC                   : Yes
  Format settings, ReFrames                : 4 frames
  Codec ID                                 : avc1
  Codec ID/Info                            : Advanced Video Coding
  Duration                                 : 15s 106ms
  Source duration                          : 15s 138ms
  Bit rate                                 : 437 Kbps
  Width                                    : 640 pixels
  Height                                   : 480 pixels
  Display aspect ratio                     : 4:3
  Frame rate                               : 30.000 fps
  Color space                              : YUV
  Chroma subsampling                       : 4:2:0
  Bit depth                                : 8 bits
  Scan type                                : Progressive
  Bits/(Pixel*Frame)                       : 0.047
  Stream size                              : 665 KiB (72%)
  Source stream size                       : 665 KiB (72%)
  Language                                 : English
  Encoded date                             : UTC 2013-09-07 20:53:33
  Tagged date                              : UTC 2013-09-07 20:53:33
  mdhd_Duration                            : 15106
  
  Audio
  ID                                       : 1
  Format                                   : MPEG Audio
  Format version                           : Version 1
  Format profile                           : Layer 3
  Mode                                     : Joint stereo
  Mode extension                           : MS Stereo
  Codec ID                                 : 6B
  Duration                                 : 15s 170ms
  Source duration                          : 15s 196ms
  Bit rate mode                            : Constant
  Bit rate                                 : 128 Kbps
  Maximum bit rate                         : 3 344 Mbps
  Channel(s)                               : 2 channels
  Sampling rate                            : 44.1 KHz
  Compression mode                         : Lossy
  Stream size                              : 238 KiB (26%)
  Source stream size                       : 238 KiB (26%)
  Language                                 : English
  Encoded date                             : UTC 2013-09-07 20:53:33
  Tagged date                              : UTC 2013-09-07 20:53:33
  mdhd_Duration                            : 15170
  </code></pre>
  
  <p>Thank you very much for any information.</p>