Thats, great thanks.
How did you generate the NANs? I don't believe under normal operation (i.e.
with data converted from YUV video to RGB) we would expect to see negative
values for the RGB data, so I guess it was from some specific input tests?
Regards,
Paul
On Sun, Aug 29, 2021 at 12:38 PM Pa
Implements a gray world color correction algorithm
using a log scale LAB colorspace
Signed-off-by: Paul Buxton
---
doc/filters.texi | 12 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_grayworld.c | 352
You're right those are unused now that the else statement is gone. Removing
and checking now.
Sorry this is turning into a bit of a grind!
On Sun, Aug 29, 2021 at 9:12 AM Paul Buxton
wrote:
> Implemants a gray world color correction algorithm
> using a log scale LAB colorspace
&
0644
index 00..33670c369e
--- /dev/null
+++ b/libavfilter/vf_grayworld.c
@@ -0,0 +1,362 @@
+/*
+ * Copyright (c) 2021 Paul Buxton
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ *
see some filters
(e.g. vf_guided) are doing?
I will resolve the the other issues at the same time.
Anything else?
On Sat, Aug 28, 2021 at 6:31 PM Paul B Mahol wrote:
>
>
> On Fri, Aug 27, 2021 at 11:18 AM Paul Buxton <
> paulbuxton.m...@googlemail.com> wrote:
>
Hi,
I am using git-prepare patch and send-email to send my patches, but don't
seem to get the subject line correct.
It seems to ignore the subject line I pass in except for if I use the cover
letter option with prepare patch, but only applies it to the cover letter.
Thanks,
Paul
__
Signed-off-by: Paul Buxton
---
doc/filters.texi | 12 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_grayworld.c | 362 +
5 files changed, 377 insertions(+), 1 deletion
Updated with more input from Paul and Andreas
Paul Buxton (1):
avfilter: Implement gray world color correction Uses log LAB
colorspace
doc/filters.texi | 12 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2
Signed-off-by: Paul Buxton
---
doc/filters.texi | 12 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_grayworld.c | 362 +
5 files changed, 377 insertions(+), 1 deletion
I will get there eventually!
On Fri, Aug 27, 2021 at 9:06 AM Paul Buxton
wrote:
> Signed-off-by: Paul Buxton
> ---
> doc/filters.texi | 12 ++
> libavfilter/Makefile | 1 +
> libavfilter/allfilters.c | 1 +
> libavfilter/version.h | 2
Signed-off-by: Paul Buxton
---
doc/filters.texi | 12 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_grayworld.c | 361 +
5 files changed, 376 insertions(+), 1 deletion
Signed-off-by: Paul Buxton
---
doc/filters.texi | 12 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_grayworld.c | 368 +
5 files changed, 383 insertions(+), 1 deletion
Implementation of a grayworld color correction filter
Paul Buxton (1):
Implement gray world color correction uses log LAB colorspace
doc/filters.texi | 12 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter
2021 at 7:28 PM Paul B Mahol wrote:
>
>
> On Tue, Aug 24, 2021 at 6:58 PM Paul Buxton <
> paulbuxton.m...@googlemail.com> wrote:
>
>> Signed-off-by: Paul Buxton
>> ---
>> MAINTAINERS| 1 +
>> doc/filters.texi | 14 ++
>
Hi,
I have just submitted my first path, hopefully it should meet the
contribution requirements. I did try and implement a Fate test to
exercise the filter but was struggling to get them to run as it would
complain about there being no path between the colorspaces. Looking through
the fate tests fo
Signed-off-by: Paul Buxton
---
MAINTAINERS| 1 +
doc/filters.texi | 14 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_grayworld.c | 401 +
6 files
Implements a grayworld based color correction filter aimed at use for
underwater video, but applicable to other situations
Paul Buxton (1):
Add grayworld color correction filer
MAINTAINERS| 1 +
doc/filters.texi | 14 ++
libavfilter/Makefile | 1
Hi,
I am a little unclear how/where to implement a test for my new filter. I
see the makefile for the video filters, but it mostly looks to be command
lines. Should I be adding some reference input/output data somewhere?
If anyone is interested in the results of the underwater correction filter.
2021 at 4:09 PM Paul B Mahol wrote:
> On Sun, Aug 15, 2021 at 3:43 PM Paul Buxton <
> paulbuxton.m...@googlemail.com>
> wrote:
>
> > Thanks both.
> >
> > I have implemented the algorithm in this paper
>
Paul B Mahol wrote:
> On Sun, Aug 15, 2021 at 3:27 PM Nicolas George wrote:
>
> > Paul Buxton (12021-08-15):
> > > I have my filter working nicely but it is a little slow. I have
> > > parallelised it where possible, but it is still a bit heavy. I am
> > wonder
Hi,
I have my filter working nicely but it is a little slow. I have
parallelised it where possible, but it is still a bit heavy. I am wondering
if there are any optimised implementations/approximations of some math
functions built in that I should use instead of the standard library
implementation
From the point of view of someone who is currently developing a filter for
ffmpeg and will be submitting a patch to the list for the first time, I
think this is a great idea.Whilst following simple instructions to prepare
and submit a patch should't be outside the ability of anyone who is capable
o
Hi everyone.
I am planning on doingsome work on ffmpeg. The first thing I notice is that
the Ubuntu build instructions on the wiki aren't currently working with
Ubuntu 20. It seems that you need to install gnutls-dev as well as
unistring-dev. Is there a review process for content on the wiki, or sh
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