Peter Rabbitson wrote:
-c:v libx264 -colorspace bt709 -pix_fmt yuv444p -profile:v
high444 \
-qp 0 -preset:v ultrafast \
-t 5 greenz.mkv
FWIW just using -colorspace is not complete.
ffmpeg -i greenz.mkv would list 709/unknown/unknown
adding
-color_primaries b
Peter Rabbitson rabbit.us> writes:
> On 05/09/2016 08:02 PM, Carl Eugen Hoyos wrote:
> > Peter Rabbitson rabbit.us> writes:
> >
> >> scale=320x240
> >
> > Scaling makes very little sense with lossless encoding.
>
> Could you elaborate?
There is no visual difference between high-quality and
lo
On 05/09/2016 08:02 PM, Carl Eugen Hoyos wrote:
Peter Rabbitson rabbit.us> writes:
scale=320x240
Scaling makes very little sense with lossless encoding.
Could you elaborate?
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Peter Rabbitson rabbit.us> writes:
> scale=320x240
Scaling makes very little sense with lossless encoding.
> -c:v libx264 -colorspace bt709 -pix_fmt yuv444p
> -profile:v high444 -qp 0 -preset:v ultrafast
Which video player are you using for playback?
If your input is RGB and you want lossle
Peter Rabbitson wrote:
On 05/09/2016 04:34 PM, Andy Furniss wrote:
Don't test with color src - use something real and you may see
different.
Nod.
For completeness below is *literally* what my pipeline looks like,
except of course it isn't "all green". The command as-is produces
satisfactor
On 05/09/2016 04:34 PM, Andy Furniss wrote:
Don't test with color src - use something real and you may see different.
Nod.
For completeness below is *literally* what my pipeline looks like,
except of course it isn't "all green". The command as-is produces
satisfactory results for both the
Peter Rabbitson wrote:
On 05/09/2016 03:01 PM, Peter Rabbitson wrote:
scale=in_color_matrix=bt601:out_color_matrix=bt709:in_range=full:out_range=tv
On a real source I don't think in_color_matrix=bt601 would be correct.
in_range=full:out_range=tv IIRC failed testing with color src (I guess
it
On 05/09/2016 02:10 PM, Andy Furniss wrote:
yuv444p is not very compatible it may just fail or the player may need
to convert to 420 anyway.
In the words of Poynton (IIRC) the only reason to convert rgb to yuv is
to enable sub-sampling (though I guess it may be better supported than
if you actu
On 05/09/2016 03:01 PM, Peter Rabbitson wrote:
scale=in_color_matrix=bt601:out_color_matrix=bt709:in_range=full:out_range=tv
Correction. Testing indicates the specification of in_* confuses ffmpeg
even more. What seems to be "the way forward" is:
ffmpeg -y -r 30 \
-filter_complex '
colo
On 05/09/2016 01:33 PM, Thomas Worth wrote:
Here's your cheat sheet if you want perfect decoding of YCbCr to RGB:
1. Encode RGB to YCbCr using the Poynton-approved RGB->709 matrix
coefficients (don't mess with 601, trust me, unless you think apples should
look like oranges)
2. Subsample the chr
- Anything else I missed/need to know? :)
You could check "-sws_flags
full_chroma_inp+full_chroma_int+accurate_rnd+bitexact" options
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Peter Rabbitson wrote:
Hello!
I am having trouble finding info on how to properly control color
reproduction, both in terms of "reference manual" and in terms of
"best practice guides". If I missed a resource neatly explaining
everything I am confused about below, please do not hesitate to
"RTFM
Peter Rabbitson rabbit.us> writes:
> >> - Am I correct that the inconsistency #00AA00 => #00AB01 is
> >> simply "cost of doing YUV business", or is the reason more
> >> nuanced/involved?
>
> This question also got skipped, and I am really keen on
> understanding whether colors can in fact rou
On Fri, May 6, 2016 at 7:04 AM, Peter Rabbitson
wrote:
> I am looking to produce high quality 720p H264 streams derived from RGB
> source material. Both the source and 99.999% of the playback environments
> are 24bit RGB color platforms (pc/mobile/etc displaying a youtube/vimeo/etc
> window in a
>> - Am I correct that the inconsistency #00AA00 => #00AB01 is simply "cost
>> of doing YUV business", or is the reason more nuanced/involved?
I have no idea how ffmpeg's internals work, but yes, if you are between RGB and
YUV then yes, there can be errors, especially in an 8-bit world. The tw
Thank you very much for confirming at least a part of my mental model ;)
Followup questions inlined below:
On 05/09/2016 10:29 AM, Paul B Mahol wrote:
On 5/6/16, Peter Rabbitson wrote:
...
== Questions
- What is the "default" conversion matrix used within ffmpeg when
nothing else is specif
On 5/6/16, Peter Rabbitson wrote:
> Hello!
>
> I am having trouble finding info on how to properly control color
> reproduction, both in terms of "reference manual" and in terms of "best
> practice guides". If I missed a resource neatly explaining everything I
> am confused about below, please do
Hello!
I am having trouble finding info on how to properly control color
reproduction, both in terms of "reference manual" and in terms of "best
practice guides". If I missed a resource neatly explaining everything I
am confused about below, please do not hesitate to "RTFM" me ;)
== Backgrou
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