How to read MP4 video metdata and get the video's Major Brand

Question

I am trying to read the metadata that exists in the MP4 video file in order to get the Major Brand ( A.K.A ftyp ) value that exists in it, but I could not find any existing methods to do so in Unity. So, I would like to know are there any methods/solutions in order to achieve this?

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 );
     }
 }