Been a while since I've been here
I think this one is pretty simple, but this was brought up on JDobbs BDRB forum and I wanted to get some (more experienced) opinions here, if I could please.
What I've been doing for quite a while with BDRB is where the Blu-ray size is pretty big (say over 30 Gigs) and I am reducing the size to fit on a BD-25 (which in actuality is really about 23.x Gigs) I normally set BDRB for 'High Quality' '2 pass', and since the settings that JDobbs uses are a tad low (in my lowly and wretched opinion) what I've been doing regularly is using x264 'Tweaks', but only on the 2nd pass. These are the tweaks that I usually use:
TWEAK_PASS_TWO=--ref 4 --deblock -2:-2 --psy-rd 1.00:0.20 --me umh --subme 8 --trellis 2 --direct auto --qcomp 0.50
I do that basically just to tune a bit more for a sharper image (film) and bump up the other settings just a little (qcomp basically moves slightly more bits to static scenes from high-motion scenes - suggested by Selur, the creator of Hybrid) Now, if the compression is not going to be that high (say the original Blu-ray size is like around 26 Gigs or so, for example) then I just use these tweaks:
TWEAK_PASS_TWO=--deblock -2:-2 --qcomp 0.50
But, when I mentioned this recently, one of the guys replied that if I tweak just the 2nd pass settings and don't match the 1st pass the same (such as the Deblock setting, for example) that I could be doing more harm than good.
This was a COMPLETELY new thought to me, because I just ASSUMED that any important tweaks would be done just on the 2nd pass. BTW, I THINK that BDRB uses 'fast 1st pass' as a default.
Am I wrong on this, do you HAVE to match some or all of the settings for BOTH passes...???
Appreciate any input on that, thanks!