Good BD-R settings

[rendez2k]

I've just converted a BD-50 to BD-25 and while for the main part it looks great, the titles look 'compressed' and visibly worse (there was lots of noise in the original video). I was using BD-Rebuilder in auto (and for this disc it decided quick) but have decided to try some manual settings. I've set it to High Quality (Default), ABR. Is ABR better than CBR?

[jdobbs]

I've just converted a BD-50 to BD-25 and while for the main part it looks great, the titles look 'compressed' and visibly worse (there was lots of noise in the original video). I was using BD-Rebuilder in auto (and for this disc it decided quick) but have decided to try some manual settings. I've set it to High Quality (Default), ABR. Is ABR better than CBR? CBR isn't an option in BD Rebuilder, so I assume you mean CRF. ABR is more predictable (in terms of size) than CRF, but generally CRF delivers better quality with the same output size -- but with a higher risk of over/undersizing.

Standard CRF sets a quality level and more-or-less ignores output size. However, in BD Rebuilder I've added a routine that does sample encodes of the source at different quality levels and attempts to predict the CRF output size for each -- and then selects the CRF value that most closely predicts the correct target size. But no matter how well you do this there is still a risk of over/undersizing. A sample is, after all, just a sample.