There might be a new mov file signature in ios 15.5 livp

[Cherryslover]

Attach the file for which the detection is inaccurate
Unfortunately, I don't have an iPhone to provide one. This seems come out with the ios 15.5. The mov file of live photo sometimes are detected as "application/octet-stream", sometimes are "video/quicktime".

Expected MIME type
video/quicktime

Returned MIME type
application/octet-stream

Version of the library you are using
v1.4.1

Output of go version
1.16.7

Additional context

Alternatively, you can fork the project, commit the file with a failing test and reference the commit in the issue.

[gabriel-vasile]

Just to make sure there is no misunderstanding what is happening:
case 1: the exact same file is sometimes detected as video/quicktime and other times as application/octet-stream
case 2: some .mov files are detected correctly as video/quicktime and others are not

What case are we in?

[Cherryslover]

We are in case 2, they are different files.

[gabriel-vasile]

I found this forum post saying .mov from ios 15.5 stopped working, but the example file they uploaded does not reproduce the problem.

I'm not sure what I can about this issue. A sample file would help a lot. Even the first 20 bytes of the file are enough to get the signature.

[Cherryslover]

I can give first 20 bytes. 00 00 00 08 77 69 64 65 00 5A 16 6A 6D 64 61 74 00 00 00 2A.

Something interesting is that I found 00 00 00 08 77 69 64 65 in a normal mov file(detected as video/quicktime) at offset 21. But when I cut a normal mov file first 20 bytes off, the mov cannot be played. So I wonder if it is a new file signature.

[gabriel-vasile]

Thanks!
You're right, there are some missing signatures for mov files.
These are quicktime signatures in Apache Tika. The signature which identifies your file is on line 7772.

I will make a commit the following days.

[Cherryslover]

Glad that helped :)