FileType magic sequence with offset cannot be recognised

[andrea-quartini]

If a file type magic sequence have an offset, it cannot be recognised because the offset is applied to the magic byte sequence as well; see for instance Mp4 and M4v file types

Steps to reproduce the behavior:

1. Into the FileTypeValidatorTests.cs, add a test case for Mp4 file type and file name "test.mp4"
2. Run the test
3. Test throws an exception on GetFileType method

[AJMitev]

This will be fixed in next release.

[Chida82]

with this file not work the validtiaon.

we think can add a other array for mp4 quicktime

mondoMp4.mp4

[AJMitev]

@Chida82 I added this file to the test cases and it worked, can you please specify your problem and maybe provide me with some code example that I can use?

[fedebona]

it works with 4.1.1 after fix of bug #34