VSO Software Forum

Hello
To get better conversion results I use "2-pass-encoding" and "Use best video quality settings" for BluRay-conversion.
But to have much better conversion speed I enable hardware optimization to use Nvidia-Cuda-hardware decoder.
Conversion is about 6 times faster than without hardware optimization and video quality is good.
What I don't understand is:
Why are "2-pass-encoding" and "Use best video quality settings" NOT WORKING if hardware optimization is ENABLED?
Without hardware optimization "2-pass-encoding" and "Use best video quality settings" are working properly, but conversion speed is very slow.
Can you help me? I don't know if enabled hardware optimization reduces video quality because "2-pass-encoding" and "Use best video quality settings" are not possible to use.
Which settings do you recommend me to have optimal conversion speed and best conversion quality?
Thanks in advance
mue.mat

There are several settings that can not be ON with hardware encoding due limited instruction set on hardware encoders.
In short - hardware is brute force encoding, does simple tasks really fast while CPU can do more detailed tasks but slower.

Thanks for quick answer.
That means: Hardware encoding is (due to my grafic card) much faster with reasanable video quality, during CPU encoding is slower but gives better video quality (while using "2-pass-encoding" and "Use best video quality settings" for BluRay-conversion)?

mue.mat wrote: Thanks for quick answer.
That means: Hardware encoding is (due to my grafic card) much faster with reasanable video quality, during CPU encoding is slower but gives better video quality (while using "2-pass-encoding" and "Use best video quality settings" for BluRay-conversion)?

Basically yes.

If original is really good quality, then in most cases you do not see any difference between HW and SW encoding, only difference being encoding time.