Read mp4 metadata [Solved]

Question

I am currently using URL to play MP4 videos. But I would like to define only certain MP4 videos will be supported in my application. So I would like to know how to read the metadata ( video info ) in MP4 videos in Unity in order to get Major Brand ( A.K.A ftyp ) value ( mp41 or custom value ).

Answer 1

After a lot of time wasted, I finally have a solution to retrieve the value of MajorBrand from Mp4 video. I am sharing my solution here, hope it will be able to help other people

 FileStream fileStream = new FileStream( filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite );
 
 BinaryReader binaryReader = new BinaryReader( fileStream );
 binaryReader.BaseStream.Seek( 0, SeekOrigin.Begin );
 byte[] verifyArray = binaryReader.ReadBytes( 32 );
 binaryReader.Close();

 ConvertToString( BitConverter.ToString( verifyArray ) );
 
 private void ConvertToString( string hex )
 {
      StringBuilder builder = new StringBuilder();

      string[] splitHex = hex.Split( new char[] { '-' } );
      for (int i = 0; i < splitHex.Length; i++)
      {
           int value = Convert.ToInt32( splitHex[i], 16 );
           string stringValue = char.ConvertFromUtf32( value );
           char charValue = (char)value;
           if( value != 0 )
              builder.Append( stringValue );
      }
 }

Read mp4 metadata [Solved]

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