Scanning a file
david.rasmussen at gmx.net
Tue Nov 1 20:35:07 CET 2005
Lasse Vågsæther Karlsen wrote:
> David Rasmussen wrote:
>> If you must know, the above one-liner actually counts the number of
>> frames in an MPEG2 file. I want to know this number for a number of
>> files for various reasons. I don't want it to take forever.
> Don't you risk getting more "frames" than the file actually have? What
> if the encoded data happens to have the magic byte values for something
I am not too sure about the details, but I've been told from a reliable
source that 0x00000100 only occurs as a "begin frame" marker, and not
anywhere else. So far, it has been true on the files I have tried it on.
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