[TIKA-851] M4V and M4A detection invalid

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0
• Fix Version/s: 1.1
• Component/s: mime
• Assignee: Unassigned
• Reporter: Alexander Chow
• Created: 27/Jan/12 13:10
• Updated: 28/Jan/12 20:18
• Resolved: 27/Jan/12 14:53

Description

When the mime type of an M4V file is detected using its name only, it returns video/x-m4v. When it is detected using the InputStream (hence utilising the MagicDetector), it incorrectly returns video/quicktime.

Using the sample M4V file from Apple's knowledge base:

TikaTest.java

public class TikaTest {

	public static void main(String[] args) throws Exception {
		String userHome = System.getProperty("user.home");

		File file = new File(userHome + "/Desktop/sample_iPod.m4v");

		InputStream is = TikaInputStream.get(file);

		Detector detector = new DefaultDetector(
			MimeTypes.getDefaultMimeTypes());

		Metadata metadata = new Metadata();

		metadata.set(Metadata.RESOURCE_NAME_KEY, file.getName());

		System.out.println("File + filename: " + detector.detect(is, metadata));

		System.out.println("File only:       " + detector.detect(is, new Metadata()));

		System.out.println("Filename only:   " + detector.detect(null, metadata));
	}

}

Renders the output:

File + filename: video/quicktime
File only:       video/quicktime
Filename only:   video/x-m4v

Moreover, if the same test is run against an M4A file, the results are even more incorrect:

File + filename: video/quicktime
File only:       video/quicktime
Filename only:   application/octet-stream