I am trying to search iTunes M4V movie files for a switch that determines if the "1080P" metatag has been set. The string is

68 64 76 64 00 00 00 11 64 61 74 61 00 00 00 15 00 00 00 00 02 00 00 00

So I have two questions
The first problem is that my video files are on the order of 4-20GB and I'm not sure if the standard

open FILE "video"
do something
close FILE

since this would be a very large file that is bigger then my memory.
How can I read the file from disk?

And then 2nd how would I do a regular expression for binary instead of searching for text?

EDIT:
I have used MP4::Info for other parts of my task.
Would it be possible to add the metatag info to the module code?

I have never altered a module before

The info I found about the iTunes data is

HD Video = hdvd 8-bit integer (boolean)
https://code.google.com/p/mp4v2/wiki/iTunesMetadata

MP4::Info source
http://cpansearch.perl.org/src/JHAR/MP4-Info-1.12/Info.pm

In reply to Search hex string in vary large binary file by westrock2000

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