________________________________________
From: [email protected] <[email protected]> on behalf
of wm4 <[email protected]>
Sent: Friday, May 29, 2015 12:45 PM
To: [email protected]
Subject: Re: [Libav-user] Colour space conversion
On Fri, 29 May 2015 05:10:41 +0000
Jasleen Kaur <[email protected]> wrote:
>
>
> ________________________________________
> From: [email protected] [[email protected]] on behalf
> of wm4 [[email protected]]
> Sent: Wednesday, May 27, 2015 6:30 PM
> To: [email protected]
> Subject: Re: [Libav-user] Colour space conversion
>
> On Wed, 27 May 2015 09:42:11 -0300
> Rafael Lúcio <[email protected]> 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
> > data.
> >
>
> 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 ?
No. If this happens, there is a major bug. Maybe switched U/V planes.
_______________________________________________
Then , If this is a bug, is there a workaround for this to continue.
-Jasleen
_______________________________________________
Libav-user mailing list
[email protected]
http://ffmpeg.org/mailman/listinfo/libav-user
