DNXHR444 and 12 bits encoding support

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DNXHR444 and 12 bits encoding support

Richard Van Den Boom
Hi,
I'm interested in creating masters of short films using DNXHR444
profiles.
According to the DNXHR specs :

https://en.wikipedia.org/wiki/DNxHR_codec

DNXHR444 should be using 12bits color depth.
However DNXHR encoding support in ffmpeg seems to be limited to 10bits
(as DNXHD). When requesting yuv444p12le or yuv444p12be, ffmpeg tells me
the pixel format is invalid and uses yuv444p10le.
I'm not 100% sure the usual video software in the market like Avid or
Premiere will support DNXHR444 in 10bits and I would prefer having the
maximum depth as possible (I use 16bits sources).
I saw that 12bits DNXHR444 decoding was supported.
Is there a way to force 12 bits depth with DNXHR encoding? If not, is
there any plan to support it?
Thanks!
--
Richard Van Den Boom
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Re: DNXHR444 and 12 bits encoding support

Paul B Mahol
On 9/12/17, Richard Van Den Boom <[hidden email]> wrote:

> Hi,
> I'm interested in creating masters of short films using DNXHR444
> profiles.
> According to the DNXHR specs :
>
> https://en.wikipedia.org/wiki/DNxHR_codec
>
> DNXHR444 should be using 12bits color depth.
> However DNXHR encoding support in ffmpeg seems to be limited to 10bits
> (as DNXHD). When requesting yuv444p12le or yuv444p12be, ffmpeg tells me
> the pixel format is invalid and uses yuv444p10le.
> I'm not 100% sure the usual video software in the market like Avid or
> Premiere will support DNXHR444 in 10bits and I would prefer having the
> maximum depth as possible (I use 16bits sources).
> I saw that 12bits DNXHR444 decoding was supported.
> Is there a way to force 12 bits depth with DNXHR encoding? If not, is
> there any plan to support it?

No and no.
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Re: DNXHR444 and 12 bits encoding support

Richard Van Den Boom
Le 2017-09-12 11:02, Paul B Mahol a écrit :

>> Is there a way to force 12 bits depth with DNXHR encoding? If not, is
>> there any plan to support it?
>
> No and no.

OK. Too bad.
Isn't it weird though to claim support for DNXHR_444 and DNXHR_HQX
profiles if  the official specs are not supported?
--
Richard Van Den Boom
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Re: DNXHR444 and 12 bits encoding support

Richard Van Den Boom
Le 2017-09-12 11:23, Richard Van Den Boom a écrit :

> Le 2017-09-12 11:02, Paul B Mahol a écrit :
>
>>> Is there a way to force 12 bits depth with DNXHR encoding? If not, is
>>> there any plan to support it?
>>
>> No and no.
>
> OK. Too bad.
> Isn't it weird though to claim support for DNXHR_444 and DNXHR_HQX
> profiles if  the official specs are not supported?
> --
> Richard Van Den Boom

OK, answering to myself, I saw on the discussion about the patch to
support DNXHR_444 encoding on the ffmpeg-devel list that you said that
10bits was also part of the specs.
Out of curiosity, what makes 12bits encoding support much more complex
to add?
--
Richard Van Den Boom
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Re: DNXHR444 and 12 bits encoding support

Paul B Mahol
On 9/12/17, Richard Van Den Boom <[hidden email]> wrote:

> Le 2017-09-12 11:23, Richard Van Den Boom a ecrit :
>> Le 2017-09-12 11:02, Paul B Mahol a ecrit :
>>
>>>> Is there a way to force 12 bits depth with DNXHR encoding? If not, is
>>>> there any plan to support it?
>>>
>>> No and no.
>>
>> OK. Too bad.
>> Isn't it weird though to claim support for DNXHR_444 and DNXHR_HQX
>> profiles if  the official specs are not supported?
>> --
>> Richard Van Den Boom
>
> OK, answering to myself, I saw on the discussion about the patch to
> support DNXHR_444 encoding on the ffmpeg-devel list that you said that
> 10bits was also part of the specs.
> Out of curiosity, what makes 12bits encoding support much more complex
> to add?

Money.
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