What software can I use to preserve the same DVD ISO file hash even after burning it to a disc so I don't have to keep it on my HDD?
In UltraISO I tried opening a DVD ISO file and saving it as a new one but got a different ISO file hash compared to the original ISO (all files inside both ISOs have identical file hashes). I also compared both ISO files in IsoBuster and it shows DVD > Session 1 > Track 01 > "ISO" and "UDF" are the same for both ISOs but under "IFO" (also listed under Track 01) has less files in it in the new ISO.
Obviously this must affect the ISO file hash even if both ISOs play fine in VLC Player. Maybe the ISO metadata has been changed even though all visible files inside are identical (in file hash and creation date). If the ISO hash is already different now, obviously it will be different when burned to a disc.
So how can I edit the ISO metadata or structure so they both match? Or should I just create a backup of the VIDEO_TS folder instead of an ISO or will that be bad for DVD playback and preservation?
I don't know if I can burn a .ISO file itself to a disc and have it remain a .ISO file but the disadvantage would be it's unplayable in a DVD player. I would prefer it to be burned to a disc that's playable on a DVD player and still has the same file hash if I want to create a backup of it later on PC. This would ensure the original is perfectly preserved and also avoids any potential privacy issues like hardware IDs, timestamps or anything else that was not in the original, ending up in any future backups.
