zhak, as a new AVS member (welcome, btw!
) you may be a bit confused about the way DVD/HDD recorders work. Almost everyone at first has trouble sorting out how DVD recorders manage lengths of time vs video quality vs capacity of a blank DVD-R.
The HQ recording speed is a "trap" many fall into, because its an option that did not exist with VHS. The minimum recording time on a VHS T120 was two hours, so its easy to assume that two one-hour HQ recordings on the HDD of the Magnavox would fit nicely on a DVD. This is not the case: DVD actually does not have any "fixed" recording time
capacity, like the T120 tapes did. Instead, DVD capacity is measured by data amount. The recording "speed" you select on your Magnavox determines how much running time will fit onto a DVD-R, so the HQ one-hour speed can only fit about 65 minutes onto a DVD in full HQ data quality (using the high speed lossless dub function from the HDD). When you choose to dub two
HQ recordings to a single DVD, the high-speed option is greyed out and the recorder will only copy to DVD in "real time" mode. This means it plays the two HQ recordings minute-by-minute in reduced quality
to fit them onto the DVD, and in the process you lose your custom chapter marks. So you get stuck waiting two hours for the DVD, instead of 18 mins, and don't even get the true HQ quality on the resulting disc.
To avoid this, I'd suggest standardizing on the SP two-hour data recording speed as wajo recommends. This guarantees 2 hours 10 minutes capacity per DVD at excellent quality. The "improvement" in quality using the HQ speed is usually negligible except for some types of sports or music concerts. For that type of material, you can use HQ on the HDD to record them, but divide such HQ recordings into one-hour chunks on the HDD before
attempting to dub DVD copies (this will ensure you get the high speed dub option, which preserves the HQ video quality at one hour per DVD). Most of us find the HQ speed to be more trouble than its worth except for disposable time-shift use on the HDD, stick with SP as the best compromise of quality vs DVD runtime. Much easier to just "set it and forget it" as the default recording speed in the recorder setup menu.