[Libav-user] Colour space conversion
Jasleen at beesys.com
Fri May 29 07:10:41 CEST 2015
From: libav-user-bounces at ffmpeg.org [libav-user-bounces at ffmpeg.org] on behalf of wm4 [nfxjfg at googlemail.com]
Sent: Wednesday, May 27, 2015 6:30 PM
To: libav-user at ffmpeg.org
Subject: Re: [Libav-user] Colour space conversion
On Wed, 27 May 2015 09:42:11 -0300
Rafael Lúcio <rafael at inova.in> wrote:
> If you convert any RGB format to YUV420 you will lose data. If you want to
> just change the format to YCbCr without losing data.. you can try YUV444
> format... its 3 bytes per pixel, just like RGB, so you will not lose any
That's quite misleading. yuv420 will of course lose data, but it's also
the standard for video compression (which typically _also_ loses data
additional to the yuv conversion). And converting between yuv444 and
RGB is also a lossy operation (at least if both use the same bit depth).
What I mean by colours change is for example ...that orange becomes blue, blue becomes green, gray remains gray.
Really confused over the solution , Do I used yuv444 instead to solve this ?
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