Re: Which codec is required?

The Unix "file" command describes the type of a file and is data driven from
a text file called /etc/magic or similar

eg:
http://www.freebsd.org/cgi/man.cgi?query=magic&sektion=5&apropos=0&manpath=FreeBSD+6.0-RELEASE+and+Ports

You could get hold of one of these from a linux distribution and write a C#
wrapper for it using the format description from the above link.

"Kevin Spencer" <kevin@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:%23hWHmIyYGHA.3532@xxxxxxxxxxxxxxxxxxxxxxx
Where can I find the format for the different file types? If I at least
had that much I could parse apart the file.....

That is the rub, eh? Since each file format is created by a different
vendor, you're not likely to find them all in one place. I know of one
resource that I have found helpful in the past:

http://www.wotsit.org/

--
HTH,

Kevin Spencer
Microsoft MVP
Professional Numbskull

Hard work is a medication for which
there is no placebo.

"UJ" <fred@xxxxxxxxxxx> wrote in message
news:uLPIzDxYGHA.4120@xxxxxxxxxxxxxxxxxxxxxxx
Where can I find the format for the different file types? If I at least
had that much I could parse apart the file.....

"Kevin Spencer" <kevin@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:%232Tr5ewYGHA.1204@xxxxxxxxxxxxxxxxxxxxxxx
Exactly, which is why I was mentioning the file extension. That is
always the first filter in terms of identifying the media type. It
narrows it down to one or a few possibles. After that, you need to read
the bits of the file itself, and that means that you have to know the
byte order of the file format.

--
HTH,

Kevin Spencer
Microsoft MVP
Professional Numbskull

Hard work is a medication for which
there is no placebo.

"Peter Bromberg [C# MVP]" <pbromberg@xxxxxxxxxxxxxxxxxxx> wrote in
message news:A7D92F13-BBAF-4FE3-B246-8810B9C435AF@xxxxxxxxxxxxxxxx
UJ,
Depending on the type of media, you will probably have to find or write
code
that parses the media headers. For example, an AVI file extension can
be
anything from straight Windows uncompressed AVI video to DIVX.
Peter

--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com




"UJ" wrote:

If I've got a video/audio file, how can I tell what Codec it needs? I
want
to be able to let the user upload a file to a server but I want to
make sure
before hand that the codec is already installed on the machine. If not
I'll
tell them it won't work.

Any ideas how to do this?

(I don't want them to download codec - I just want to use the codecs I
have
on the machine already.)

TIA - Jeff.











.

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