> On Wed, Feb 26, 2020 at 5:34 PM Carl Eugen Hoyos <ceffm...@gmail.com> wrote:
> 
>> Am Mi., 26. Feb. 2020 um 17:15 Uhr schrieb Carl Zwanzig <c...@tuunq.com>:
>>> 
>>> On 2/26/2020 5:01 AM, Carl Eugen Hoyos wrote:
>>>> Am Mi., 26. Feb. 2020 um 07:31 Uhr schrieb Ted Park <
>> kumowoon1...@gmail.com>:
>>>>> Just for completeness, there is now the Afterburner card dedicated to
>>>>> ProRes decode and render (not a GPU), but a Mac Pro is the only
>>>>> platform that supports it and if you have that setup, videotoolbox
>> will
>>>>> use it automatically.
>>>> 
>>>> FFmpeg's videotoolbox implementation is missing ProRes support.
>>> 
>>> Just curious, is that by intent or has no one implemented/updated the
>>> support?
>> 
>> Certainly not by intent.
>> 
> On Feb 27, 2020, at 2:02 AM, andrei ka <andrei.k....@gmail.com> wrote:
> 
> curious, why are you dying to get prores ? qt has at best 8 bits h264
> encoding, you're just resampble colours to 10 bits. may be nvenc's lossless
> 10 bits h264 coud fit your needs as well, i'd go ~16x real time...

RE "dying to get prores" -- so far I haven't encountered a codec worth dying 
for. The only reason for using it is that a) it's a widely standard in post 
production environments.  b) I hadn't heard of nvenc lossless.  Is it actually 
lossless or just perceptually lossless?  My suspicion is it's missing some of 
features expected in broadcast editing (though to be fair the "professional 
broadcast world" frequently fails to live up to its own stated standards).  
h.265 isn't considered an industry standard, but if there are genuine benefits 
over current standards like ProRes and the DNxHRs and doesn't anger the techs 
too much, then it could see adoption.  Curious to know more about it.

RE "qt has at best 8 bits h264 encoding" -- To me this doesn't sound accurate.  
QT isn't synonymous with h.264.  It's just a wrapper that can hold h.264 as 
well as plenty of other formats. ProRes QTs can handle 10- even 12-bit, as well 
as Rec 709, and alpha channels.


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