Film-Tech Forum ARCHIVE: Removing a *.PNG file

my profile | my password | search | faq & rules | forum home

»	Film-Tech Forum ARCHIVE » Community » Film-Yak » *Removing a .PNG file**

Author

Topic: Removing a *.PNG file

Barry Floyd
Phenomenal Film Handler

Posts: 1079
From: Lebanon, Tennessee, USA
Registered: Mar 2000

posted 09-03-2002 12:53 PM

A friend of mine sent me a file attached to an email with a ".png" extension, but now my computer will not let me delete it. I've tried Windows Explorer.. won't work, deleted the entire folder it's in to the Recycle Bin, but when emptying the Recycle Bin, it still won't delete that file. I've even tried to go thru DOS and delete it, but it tells me "access is denied". What gives with this file?

I've run Norton Anti-Virus on it to see if it might be a virus file, but it reports nothing?

Any help would be appreciated.....

------------------
Barry Floyd
Floyd Entertainment Group
Lebanon, Tennessee

Stardust Drive-In Theatre
Watertown, Tennessee

| IP: Logged

Sam Hunter
Jedi Master Film Handler

Posts: 779
From: West Monroe, LA, USA
Registered: Jan 2002

posted 09-03-2002 01:40 PM

Boot your PC up with a startup disk and then delete the file.

------------------
Samual Hunter Sr.

KC5ZSL

| IP: Logged

Barry Floyd
Phenomenal Film Handler

Posts: 1079
From: Lebanon, Tennessee, USA
Registered: Mar 2000

posted 09-03-2002 01:48 PM

Did some searching, and found "www.annoyance.org" or something like that, where they bash Windows 98 as much as you guys bash technicolor.

Anyway, I had to "clear" the file from showing up in my Taskbar - in the recent documents folder, then once it was clear, it deleted with no problem.

Thanks anyway Sam...

| IP: Logged

Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99

posted 09-03-2002 02:39 PM

A "ping" file (.png) is similar to a .gif. It is used under the same conditions/constraints as a .gif. If memory serves it stands for "Packaged Network Graphics".

Two reasons to use it:

It's not patented. The GIF format is "owned" by Compuserve (or whoever owns Compuserve now). They demand their royalties from everyone who wants to write an application that uses it. Ping is royalty free.
Ping is better than GIF. Depending on the circumstances, ping files will be as much as 20-30% smaller than GIF. Ping compression is considered a lossless form of compression, depending on the paramerter settings at the time the file is originally written.

Some browsers don't read pings, or you may need a plug-in or something, I'm not sure. I haven't had a problem reading any .png files.

QuickTime will read pings. You can download that free from Apple.com

| IP: Logged

Bobby Henderson
"Ask me about Trajan."

Posts: 10973
From: Lawton, OK, USA
Registered: Apr 2001

posted 09-03-2002 05:05 PM

Using both Adobe Photoshop and Macromedia Fireworks MX, I haven't seen much file size savings at all in using PNG. For bitmap logo art with flat color, I do just as well in using an indexed GIF --or better yet, a vector-based Flash SWF image. Compression/quality levels for PNG on full color photo images is usually unacceptable for the large resulting file sizes. I prefer to go with JPEG instead.

Once broadband Internet access becomes truly commonplace (instead of the current reality where only 10% to 20% of users at best have any high speed access) then the PNG format can become more accepted.

One thing I do like about PNG is the ability to use alpha channels for transparancy effects. It makes the format work a lot like TIFF.

| IP: Logged

Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99

posted 09-04-2002 08:22 PM

PNG is simply another (royalty free) form of GIF. Thus, it isn't fit for full color images the way JPEG is. It's still better to use JPEG for pictures.

If you want to take full advantage of PNG's better file size/compression you need to fiddle with the dithering and compression parameters. This depends on the program you use to write the file with in the first place. I use Photoshop Elements. It has a settings panel for saving different formats.

I don't really know much more than that. I don't do a lot of saving or original graphics work anymore. It's been a while since I actually farted around with the settings and compared results.

| IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.