dv/AVI file compressed with winrar for storage at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Open DV Discussion
For topics which don't fit into any of the other categories.

Thread Tools Search this Thread
Old January 27th, 2010, 06:37 PM   #1
Major Player
Join Date: Feb 2006
Posts: 293
dv/AVI file compressed with winrar for storage

I have a DV/AVI file that is 7.57 GB that i compressed with winrar at the highest setting and the file is now 3.88 GB. I did this so i could store it on a dvd-r for backup/archiving.

is that bad for the dv/avi file?
Dave Morgan is offline   Reply With Quote
Old January 27th, 2010, 06:47 PM   #2
Inner Circle
Join Date: Nov 2006
Location: Tallahassee, FL
Posts: 4,100
Shouldnt affect it at all. Actually kinda cool you got that much compression. I would do a quick test on the file though to make sure it comes back as expected.
DVX100, PMW-EX1, Canon 550D, FigRig, Dell Octocore, Avid MC4/5, MB Looks, RedCineX, Matrox MX02 mini, GTech RAID, Edirol R-4, Senn. G2 Evo, Countryman, Moles and Lowels.
Perrone Ford is offline   Reply With Quote
Old January 27th, 2010, 07:18 PM   #3
Major Player
Join Date: Sep 2008
Location: East Bay Cali
Posts: 563
that is cool, never thought of that because most other highly compressed things dont squeeze much.

i just tested something, based on a hunch and previous info.
if I "corrupt" part of a DV file (but not the header) , just like the DV tapes data itself it will just glitch a bit and fly right on past it.
if I corrupt part of a zipped file with a DV file in it, it doesnt even work.
i corrupt part of a zip7 file and it stopped extraction at the corrupt point

i corrupted the file by opening them in a Hex Editor then zeroing out areas of thier data, so that isnt all the ways it could become corrupt, and either file could become corrupt and unreadable anyway. i just was remembering how Useless some compressed files were when parts of them became corrupted.
there is repairing stuff for compressed archives, but others have tried it and it often isnt so great either.

I did get more than 50% reductions also in compression, black background stuff.

So that would be one concideration, the DV file type is very robust and forgiving, an archive of it might not be as easily recoverable on a minor corruption of the data. It would still be a great way to web transport DV files.

because these types of compression are just finding repetition and patterns and attempt to keep every single bit of any file exactally the same, there is no "loss" in the compression.
Re-learning everything all over again, one more time.
Marty Welk is offline   Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

(800) 223-2500
New York, NY

B&H Photo Video
(866) 521-7381
New York, NY

Texas Media Systems
(512) 440-1400
Austin, TX

Precision Camera
(800) 677-1023
Austin, TX

(800) 323-2325
Mineola, NY

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -6. The time now is 06:27 AM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2018 The Digital Video Information Network