Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies. Read More.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS General Gear Talk Data Storage, Memory Cards & Backup
Thread started 20 Dec 2017 (Wednesday) 18:45
Prev/next
sponsored links
(this ad will go away when you log in as registered member)

Bad Peggy

 
Archibald
You must be quackers!
Archibald's Avatar
Joined May 2008
Calgary
Dec 20, 2017 18:45 |  #1

Some time ago I discovered a small number of corrupted JPG files on my hard drive. They were all JPGs derived from my Canon EOS 40D raw files (but not from Lightroom). This was a case of "silent" corruption - the files could be backed up and copied without problem. I did not know they were corrupted until I opened them and saw crazy colors.

The raw files were not corrupted. I have not found any corruption since, which is a good sign.

However, I started to wonder what other files might be corrupt on my system, and whether there was some nefarious process going on in my computer. So I looked for a general utility to scan my data files (I use Windows) to detect corruption. But there doesn't seem to be such a utility.

But recently I came across the program "Bad Peggy" which is at least able to scan many photo files (including JPG, JPEG, GIF, etc but not raw files) and check them for corruption. I ran the prog on my files and it seemed to work well. It quickly found the corrupted JPGs mentioned earlier. It also flagged all native JPGs from my Sony RX100 as "not a JPEG file". (They look fine, though.) A small number of JPGs from my phone had some benign errors.

So overall, after scanning over 10,000 jpgs, I infer that my other files are probably also OK and conclude my system is healthy.

Some of you might find Bad Peggy useful. There is a free trial.
https://www.coderslago​on.com/#/product/badpe​ggy (external link)


Pentax Spotmatic F with 28/3.5, 50/1.4, 50/1.8, 135/3.5; Canon digital gear
C&C always welcome.
Picture editing OK

LOG IN TO REPLY

139 views & 1 like for this thread
Bad Peggy
FORUMS General Gear Talk Data Storage, Memory Cards & Backup


Not a member yet? Click here to register to the forums.
Registered members get all the features: search, following threads, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, settings, view hosted photos, own reviews and more...


AAA

Send feedback to staff    •   Jump to forum...    •   Rules    •   Index    •   New posts    •   RTAT    •   'Best of'    •   Gallery    •   Gear    •   Reviews    •   Polls

COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies. Privacy policy and cookie usage info.

POWERED BY AMASS 1.4version 1.4
made in Finland
by Pekka Saarinen
for photography-on-the.net
Spent 0.00083 for 6 database queries.
PAGE COMPLETED IN 0.01s
Latest registered member is marywilliams
814 guests, 321 members online
Simultaneous users record so far is 6430, that happened on Dec 03, 2017