[TIKA-3195] Inconsistent result of tika.detect(InputStream) and tika.detect(TikaInputStream)

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.24.1
• Component/s: detector
• Assignee: Unassigned
• Reporter: xiaojie
• Created: 11/Sep/20 07:45
• Updated: 14/Sep/20 08:47

Description

When we tried to detect ogg video, samples can be found from  https://filesamples.com/formats/ogv

We noticed that tika will return different result when detect:

Tika tika = new Tika();
try(InputStream inputStream = Main.class.getResourceAsStream("/sample_1280x720.ogv");
    TikaInputStream tikaInputStream = TikaInputStream.get(inputStream)) {
    String mimeType1 = tika.detect(tikaInputStream);
    System.out.println(mimeType1);
}
# output: video/theora

Path path = Paths.get(Main.class.getResource("/sample_1280x720.ogv").toURI());
String mimeType2 = tika.detect(path);
System.out.println(mimeType2);
# output: video/theora 

try(InputStream inputStream = Main.class.getResourceAsStream("/sample_1280x720.ogv")) {
    String mimeType3 = tika.detect(inputStream);
    System.out.println(mimeType3);
}
# output: application/ogg

The result which takes in the inputStream is different from others. 

Is this the expected behavior?