On Tue, Apr 21, 2015 at 05:25:37PM -0300, Pedro Arthur wrote:
New patch with changes.
2015-04-21 13:14 GMT-03:00 Pedro Arthur bygran...@gmail.com:
I intended to fetch the correct gamma value from the video/image metada
or pass it by flag (like gamma=x) but yet I don't know how to get the
Thank you for the tips, I'll work on it.
2015-04-22 3:06 GMT-03:00 nand n...@nand.wakku.to:
I intended to fetch the correct gamma value from the video/image metada
or pass it by flag (like gamma=x) but yet I don't know how to get the
correct gamma based on the input, thus for now it is
I'll add that for some encodings filters with negative lobes will
cause ringing no matter the direction up/down, especially true for
higher dynamic range encodings like log and HDR options like SMPTE ST
2084
Kevin
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I intended to fetch the correct gamma value from the video/image metada
or pass it by flag (like gamma=x) but yet I don't know how to get the
correct gamma based on the input, thus for now it is hardcode.
This is how we do it in mpv:
1. If the source has enum AVColorTransferCharacteristic
Patch which adds support for gamma correct scaling in libswscale.
From fe34ea493ffae9b6c1655112a66b5e0c4cfef26d Mon Sep 17 00:00:00 2001
From: Pedro Arthur bygran...@gmail.com
Date: Fri, 17 Apr 2015 17:08:42 -0300
Subject: [PATCH] Add gamma encodign/decoding before/after scaling in
libswscale
On Tue, Apr 21, 2015 at 12:07:54PM -0300, Pedro Arthur wrote:
Patch which adds support for gamma correct scaling in libswscale.
options.c |3 ++
swscale.c | 51 +++
swscale.h |1
swscale_internal.h |9 +-
utils.c
Le duodi 2 floréal, an CCXXIII, Pedro Arthur a écrit :
Subject: [FFmpeg-devel] [GSoC] Patch which adds support for gamma correct
sws: add support for gamma-correct scaling
+{ true,enable,0,
AV_OPT_TYPE_CONST, { .i64 = 1
Pedro
I understand the desire to 'degamma' images prior to scaling, I'd be
interested in understanding how this could work with the colour_trc
options rather than only assuming a simple gamma.
Kevin
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ffmpeg-devel@ffmpeg.org
New patch with changes.
2015-04-21 13:14 GMT-03:00 Pedro Arthur bygran...@gmail.com:
I intended to fetch the correct gamma value from the video/image metada
or pass it by flag (like gamma=x) but yet I don't know how to get the
correct gamma based on the input, thus for now it is hardcode.
Le duodi 2 floréal, an CCXXIII, Pedro Arthur a écrit :
#define SWS_SPLINE0x400
+#define SWS_GAMMA_CORRECT 0x800
Sorry, I forgot one comment in my first email:
This has risks of conflicts if the avconv fork adds a different flag with
the same value. To avoid that, we usually leave a
I intended to fetch the correct gamma value from the video/image metada
or pass it by flag (like gamma=x) but yet I don't know how to get the
correct gamma based on the input, thus for now it is hardcode.
2015-04-21 12:31 GMT-03:00 Kevin Wheatley kevin.j.wheat...@gmail.com:
Pedro
I understand
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