[Info-vax] proper format for JPEG files

Jan-Erik Soderholm jan-erik.soderholm at telia.com
Thu Jul 28 17:52:26 EDT 2011


Phillip Helbig---undress to reply wrote 2011-07-28 23:22:
> In article<j0ps74$761$1 at adenine.netfront.net>, Mark Berryman
> <mark at theberrymans.com>  writes:
>
>> On 7/23/11 1:52 PM, Phillip Helbig---undress to reply wrote:
>>> What is the "proper" format for JPEG files on VMS, in particular if they
>>> are served by a web server and displayed in a web browser?  I have some
>>> which are
>>>
>>>      Record format:      Fixed length 512 byte records
>>>      Record attributes:  None
>>>
>>> and some which are
>>>
>>>      Record format:      Stream_LF, maximum 0 bytes, longest 32767 bytes
>>>      Record attributes:  Carriage return carriage control
>>>
>>> and both work.  (The former were transferred via FTP from a Windows
>>> system (sorry, I don't have a VMS machine with a DVD reader) and the
>>> latter saved from the web via a web browser.)
>>>
>> Both are valid although a poorly coded program can choke on either one.
>
> Thanks for all the input.  Back to my original question: I'm thinking
> mainly of JPEG files viewed by a web browser (or possibly XV or
> something similar) (the web browser running on the same machine where
> the files are or a different one---perhaps via HTTP across the internet)
> which come from a variety of sources: read from CD, transferred via FTP,
> downloaded from the web etc.  As I mentioned, both formats worked with
> the web server (OSU) and web browser (CSWB---running on the same machine
> or at least in the same cluster---and a Windows machine across the
> internet).  I would prefer to have all in the same format.  The primary
> motivation is that this format should be most likely to work with a
> variety of software.
>

As long as the files "works" (that is, are displayed correctly on the
usual browsers) I couldn't care less how they are stored... :-)

What is "a variety of software" ?



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