I’m wanting to archive DVD’s and save them to a hard disk drive. But to save space on the HDD, I want to compress the DVD content as much as possible without loss of data.
Presently I’m using (AnyDVD, where required) plus IsoPuzzle to make copies of my DVD’s. I’m using IsoPuzzle as some DVD’s are failing/faulty and I want to retrieve as much data from the DVD’s as possible. This process results in an ISO file.
So, I now wish to compress the ISO files to much smaller files before archiving them to the HDD.
The file compression MUST be lossless! The resulting compressed file name doesn’t matter either.
I’ve tried using 7-zip, Nanozip, Razor, xz, and zcm, and tried using Precomp and Pzlib as file pre-processors to help improve compression when using one of the main file compressors. So far the best compressed result is when using Nanozip by itself, but this only results in about 10% reduction in file size, I’d like better compression (nearer 40% or more reduction in file size).
There are some extreme file compressors such as PAQ8PX, Emma, and Cmix, but these literally can take a day or more to compress large files! So these are not really convenient. Ideally compression should take no more than about an hour or so.
Can anyone suggest a suitable file compressor, and/or the use of a combination of compressors to create much smaller archives of DVD TV and movie content please?