Renamin JPEG

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I have a lot of pictures which are all in Jpeg format. However, if I rename them it afterwards will be shown as an unknown file format and the only way to open them is to write the file extension on the end of the file name (XXXX.jpeg) Has anyone experienced this problem and what is the fix. Thanks a lot for your input.
 
You can't change a file type by just changing the extension.
You need to use a program that actually alters the file,
there are programs that will do this in batches.
IRFanview is free and has a batch conversion /rename process
in the file menu.
http://www.irfanview.com/


--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.


message
| I have a lot of pictures which are all in Jpeg format.
However, if I rename them it afterwards will be shown as an
unknown file format and the only way to open them is to
write the file extension on the end of the file name
(XXXX.jpeg) Has anyone experienced this problem and what is
the fix. Thanks a lot for your input.
 
Thanks for your quick response. I maybe expressed myself a bit wrong, I do know that I just can't change the file extension. The actual problem however is that the file is shown a jpeg format but after I rename it it has and unknown file format.
 
If you type the name and don't include the proper extension,
the file will have an unknown format. What I mean is that
you should...
1. Have Windows set to show file extensions for all file
types.
2. Be careful with how you enter the new name, if you type
nename.jpg the extension will be added, but if you type
newname. with the period and no extension no extension will
be added automatically.
If you are using Windows and selecting rename and you just
overtype the highlighted name without an extension, Windows
will follow your instruction to create a file without an
extension.

I think your best option would be to get IRFanview and use
it to rename picture files.

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.



message
| Thanks for your quick response. I maybe expressed myself
a bit wrong, I do know that I just can't change the file
extension. The actual problem however is that the file is
shown a jpeg format but after I rename it it has and unknown
file format.
|
| "Jim Macklin" wrote:
|
| > You can't change a file type by just changing the
extension.
| > You need to use a program that actually alters the file,
| > there are programs that will do this in batches.
| > IRFanview is free and has a batch conversion /rename
process
| > in the file menu.
| > http://www.irfanview.com/
| >
| >
| > --
| > The people think the Constitution protects their rights;
| > But government sees it as an obstacle to be overcome.
| >
| >
| > "Workaholic" <[email protected]>
wrote in
| > message
| >
| > | I have a lot of pictures which are all in Jpeg format.
| > However, if I rename them it afterwards will be shown as
an
| > unknown file format and the only way to open them is to
| > write the file extension on the end of the file name
| > (XXXX.jpeg) Has anyone experienced this problem and
what is
| > the fix. Thanks a lot for your input.
| >
| >
| >
 
Hi,

You should check your Folder Options in Windows Explorer.
On the second tab in folder options you will find options with checkboxes. Find the option: " Hide Extensions for known filetypes"
Uncheck this option, and apply-ok this window.

You are now able to see all the extensions on all your files.
So all your photos are now shown as xxxx.jpeg in Windows Explorer.
If you want to rename them, also make sure the File Type when saving is displaying jpg/jpeg.
 
Workaholic said:
I have a lot of pictures which are all in Jpeg format. However, if I rename them it afterwards will be shown as an unknown file format and the only way to open them is to write the file extension on the end of the file name (XXXX.jpeg) Has anyone experienced this problem and what is the fix. Thanks a lot for your input.
Click to expand...

Windows determines what "type" your file is by examining the
extension. If the extension is "jpeg" (for example), it decides that
it's a JPEG file, and displays next to the file name the icon
associated with the program you've chosen to open JPEG files. When you
double-click the file name, it opens that program.

If a file has no extension, Windows has no way of telling what the
file type is. If you rename a *.jpeg file and give it a *.doc
extension, Windows will now think that it's a Word file (assuming that
Word is installed on your machine). It will display Word's icon by the
file, and if you double-click the file it will open Word and pass the
file to it. Since it's really a jpeg file with the wrong extension
Word will not be able to open it.

The moral of the story is that file extensions are very important to
the Windows OS. If you rename a file it's vital not to change the
extension.
 
Workaholic said:
I have a lot of pictures which are all in Jpeg format. However, if I rename them it afterwards will be shown as an unknown file format and the only way to open them is to write the file extension on the end of the file name (XXXX.jpeg) Has anyone experienced this problem and what is the fix.
Click to expand...

Files *need* the extension - that is how the system recognises what to
do with them. You can set Folder Options - View to 'Hide file
extensions of known types' but I don't advise it. When you then rename
you can see the extension and change only the earlier part
 
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