[Libva] rescale frame. HD4600 Haswell.
Nikita Orlov
nikitos1550 at yandex.ru
Sun Nov 30 05:00:46 PST 2014
Hello!
Still no luck with resizing/scaling.
http://01org.github.io/libva_master_doxygen/va__vpp_8h.html here can`t see anything related to subject.
Friends, need more help...
26.11.2014, 21:14, "Nikita Orlov" <nikitos1550 at yandex.ru>:
> thanks, we will try, if I will have more questions, I will ask you.
>
> 26.11.2014, 21:02, "Peter Frühberger" <peter.fruehberger at gmail.com>:
>> Hi,
>>
>> here is a more advanced example of doing deinterlacing with VPP, you
>> can change the filter operation of course to do scaling:
>> https://github.com/xbmc/xbmc/blob/master/xbmc/cores/dvdplayer/DVDCodecs/Video/VAAPI.cpp#L2702
>>
>> Usage of VPP is always the same, no matter of the actual operation.
>>
>> Best Regards
>> Peter
>>
>> 2014-11-26 18:53 GMT+01:00 Nikita Orlov <nikitos1550 at yandex.ru>:
>>> Hi!
>>>
>>> Could you point me to some exmaples of scaling before encoding?
>>> Can`t find any docs about it around web :-(
>>>
>>> Thanks in advance!
>>>
>>> 26.11.2014, 16:52, "Steven Toth" <stoth at kernellabs.com>:
>>>> \> But, what do you mean about pre and post processing?
>>>>> Pre and post what operation? Pre video encoding and past video encoding?
>>>>>
>>>>> If we are talking about encoding, I can`t imagine any post processing, because result
>>>>> of encoding is bitstream.
>>>>>
>>>>> Could you explain it for me a bit more. Please.
>>>> The hardware has a Video Processing Pipeline, that can apply various
>>>> effects and transforms prior to encoding. Once of those mechanisms (as
>>>> Nikita pointed out) is a video scaler.
>>>>
>>>> So, yes, you can scale the video prior to encoding. I've used it for
>>>> scaling down, although I don't think I've ever tried to scale up.
>>>>
>>>> --
>>>> Steven Toth - Kernel Labs
>>>> http://www.kernellabs.com
>>> --
>>> Nikita Orlov
>>> Skype: nik_stet
>>> QQ: 2717846083
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>
> --
> Nikita Orlov
> Skype: nik_stet
> QQ: 2717846083
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Nikita Orlov
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