CUDA and Quick sync options

Discussion in 'Requests and Suggestions' started by calcu007, Dec 22, 2014.

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  1. calcu007

    calcu007 Well-Known Member

    IF ticket #660 or #661 are implemented a option can be added so the user can select(or prioritize) the preferred method or hardware to be used in the conversion(or copy).
     
  2. RedFox 1

    RedFox 1 Super Moderator

    I cant say for sure, but you cannot use ATI Video and Nvidia Cuda at the same time, nor can you use a Video card with Intel Quick Sync, so I would say only one can be used at a time, unless you have some sort of super rig that I don't know about.
     
  3. calcu007

    calcu007 Well-Known Member

    Yes, I know. That suggestion is for a option to user chose what video card to use and not let CloneBD to chose
     
  4. RedFox 1

    RedFox 1 Super Moderator

    I believe the program will auto detect the video option in the computer and use that. Many people do not even know if they have ATI or Nvidia graphics, and only people with Intel chip with supported graphics can use Quick Sync even if they have a discrete video card, they would have to make the choice themselves anyway so have an option to let the user choose would be in my opinion, mixing things up more than helping, but who know what the developers will do. I surely don't
     
  5. Tom

    Tom Redfox Team Member Staff Member

    I fully agree with SlyFox 1: usually people don't even know that they have a video card.
    I am sure, if developers implement CUDA/OpenCL etc, they'll do it in a smart way.
     
  6. martythebrit

    martythebrit Active Member

    Quick Sync? Yes please.....
     
  7. RedFox 1

    RedFox 1 Super Moderator

    You do realize you have to use an Intel Chipset that has video graphics:? Like the Haswell or Some Sandy Bridge CPUs.
     
  8. martythebrit

    martythebrit Active Member

    ...which is why I have an i7-3770K with Intel HD4000 graphics and 16GB's of memory.... I've been using Quick Sync in other products for a long, long while.
     
  9. calcu007

    calcu007 Well-Known Member

    In my case I have a laptop with Intel and Nvidia cards, but Nvidia card work better for me in the conversions
     
  10. crashing bore

    crashing bore New Member

    quicksync re-encodes can lack in the quality department

    In my experience, the quicksync encoders often are very speedy, but also have quality issues. Typically they do not implement the finer nuances that popular CPU based encoders do, including libav, and libav does not have access to intermediate quicksync output when quicksync is in use, so these additional algorithms cannot be implemented and quality suffers somewhat. Many people will not notice the details, but I most certainly do.
    Each successive implementation of quicksync on the Sandy Bridge, Ivy Bridge, and Haswell seems to have dropped a little quality for speed with each iteration.

    These statements apply equally for the NVidia and ATI Hardware based encoders, although iterations on later hardware tends to be a little better. CUDA and Open CL can be used to advantage if the control over the algorithm can be utilised.
    But I stray from the topic:
    My position is that being able to turn off both quicksync and CUDA and only use CPU cylces (at a cost of 20x less performance) would be advantageous because it can lead to better encodes...
    Just sayin.
     
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