Jeroni. If you have 5 minute to spend, you can make a "SEARCH" on the forum. So you can found information about "KPROBE".
The first thing was that you can use cdspeed,kprobe,dvdinfopro on the same drive you can get same results. The difference was between drive supported by these software. For example if you do a scan on the same media with Asus E616, Plextor 712, Msi1816, Liteon 167T, Benq 1620, you can be sure that you obtain differents result.
The problem was how constructor implements the error test or error report. When you utilize cdspeed you have the "Average Scaning interval". If you test media with different drive you can see you have different value :
Liteon SOHD-167T 1.22 Ecc
Asus E616P2 64 Ecc
Benq DW1620 8.22 Ecc
msi (dead after 3 month)
So I think, it's my opinion after 1 year of dvd burning testing and headaches, that Liteon offer the best testing because he have the lowest interval.
One thing that was sure was you have to buy good media. When i started to write dvd i think that was like cd, you can buy cheap media, it works. After some month that was not true.
I recommand to use :
dvd-r : Real Ritek G04-G05 grade A, TTG media, MCC
dvd+r : Tayoyunden, Fuji, Mcc
After, for the dvdplayer compatibility you had to make test on cdspeed,kprobe or dvdinfopro to verify that the PIF was under 32. You can found on Kprobe thread information about the standard. After you have to test the readspeed to see if you have a beautifull curve.
To finish if you have that good disc, put it in your player. If the player do not work, you can trash it. I have 2 old player Toshiba sd200ee and tokai 712s (the two are 6 years old or more), and i have no problem.
One last thing was, do not forget to set the booktype of you + media to dvd-rom to be the more compatible.
this is my response. But i plan to make an article or a thread on this problem and perhaps a soft.
by (sorry for my poor english)