title: How to remove or edit Exif from mp4 video?
body: <p>I recorded a Full HD video with Samsung Galaxy II, when I uploaded it to YouTube I found that it turned to 90 degrees like Portrait layout 1080x1920 NOT 1920x1080.
  I found the cause of the problem: </p>
  
  <blockquote>
    <p>YouTube is reading video metadata and rotate video acording Exif
    orientation before encoding</p>
  </blockquote>
  
  <p>This is ExifTool report (please see last tag "Rotation"):
  <code><pre>
  ExifTool Version Number         : 8.61
  File Name                       : video.mp4
  Directory                       : .
  File Size                       : 217 MB
  File Modification Date/Time     : 2011:08:11 00:47:23+04:00
  File Permissions                : rw-rw-rw-
  File Type                       : 3GP
  MIME Type                       : video/3gpp
  Major Brand                     : 3GPP Media (.3GP) Release 4
  Minor Version                   : 0.3.0
  Compatible Brands               : 3gp4, 3gp6
  Movie Data Size                 : 227471371
  Movie Header Version            : 0
  Create Date                     : 1900:01:00 00:00:00
  Modify Date                     : 1900:01:00 00:00:00
  Time Scale                      : 1000
  Duration                        : 0:01:46
  Preferred Rate                  : 1
  Preferred Volume                : 100.00%
  Preview Time                    : 0 s
  Preview Duration                : 0 s
  Poster Time                     : 0 s
  Selection Time                  : 0 s
  Selection Duration              : 0 s
  Current Time                    : 0 s
  Next Track ID                   : 3
  Track Header Version            : 0
  Track Create Date               : 1900:01:00 00:00:00
  Track Modify Date               : 1900:01:00 00:00:00
  Track ID                        : 1
  Track Duration                  : 0:01:46
  Track Layer                     : 0
  Track Volume                    : 0.00%
  Image Width                     : 1920
  Image Height                    : 1080
  Graphics Mode                   : srcCopy
  Op Color                        : 0 0 0
  Compressor ID                   : avc1
  Source Image Width              : 1920
  Source Image Height             : 1080
  X Resolution                    : 72
  Y Resolution                    : 72
  Bit Depth                       : 24
  Video Frame Rate                : 30.023
  Matrix Structure                : 1 0 0 0 1 0 0 0 1
  Media Header Version            : 0
  Media Create Date               : 1900:01:00 00:00:00
  Media Modify Date               : 1900:01:00 00:00:00
  Media Time Scale                : 16000
  Media Duration                  : 0:01:46
  Handler Type                    : Audio Track
  Handler Description             : SoundHandler
  Balance                         : 0
  Audio Format                    : mp4a
  Audio Channels                  : 1
  Audio Bits Per Sample           : 16
  Audio Sample Rate               : 16000
  Play Mode                       : SEQ_PLAY
  Avg Bitrate                     : 17.1 Mbps
  Image Size                      : 1920x1080
  Rotation                        : 90
  </pre></code></p>
  
  <p>How do I remove whole Exif data or just edit Rotation property?</p>