The code is running fine on my laptop. What seg-fault log are you getting?
Also, I looked on internet for converting rgb to yuv with integers, I got
these equations.
http://stackoverflow.com/questions/4979504/fast-rgb-yuv-conversion-in-opencl
On Sun, Oct 26, 2014 at 4:27 PM, Michael Niedermayer <michae...@gmx.at>
wrote:
> On Sun, Oct 26, 2014 at 02:51:48PM +0530, arwa arif wrote:
> > I think the segmentation fault is maybe because of wrong input format.
> The
> > code runs for rgb24 only. I have attached the updated patch along with
> the
> > tested input file. I was not able to attach a video file. So, for now I
> am
> > attaching an image instead.
>
> code must not segfault
>
> also, this segfaults too:
> ./ffplay images.jpeg -vf xbr,xbr
>
>
> [...]
>
> > +/**
> > +* Calculates the weight of difference of the pixels, by transforming
> these
> > +* pixels into their Y'UV parts. It then uses the threshold used by HQx
> filters:
> > +* 48*Y + 7*U + 6*V, to give it those smooth looking edges.
> > +**/
> > +static int d(AVFrame *in,int x1,int y1,int x2,int y2){
> > +
> > + int r1 = *(in->data[0] + y1 * in->linesize[0] + x1*3);
> > + int g1 = *(in->data[0] + y1 * in->linesize[0] + x1*3 + 1);
> > + int b1 = *(in->data[0] + y1 * in->linesize[0] + x1*3 + 2);
> > +
> > + int r2 = *(in->data[0] + y2 * in->linesize[0] + x2*3);
> > + int g2 = *(in->data[0] + y2 * in->linesize[0] + x2*3 + 1);
> > + int b2 = *(in->data[0] + y2 * in->linesize[0] + x2*3 + 2);
> > +
> > + int r = (r1 - r2);
> > + int g = (g1 - g2);
>
> > + int b = (b1 - b2);
>
> trailing whitespace
> tools/patcheck should find all of them
>
>
> > +
> > + /*Convert RGB to Y'UV*/
> > + int y = abs( ( ( 66 * r + 129 * g + 25 * b + 128) >> 8) + 16);
> > + int u = abs( ( ( -38 * r - 74 * g + 112 * b + 128) >> 8) + 128);
> > + int v = abs( ( ( 112 * r - 94 * g - 18 * b + 128) >> 8) + 128);
>
> this looks alot better but i think the equations are still not correct
>
>
> [...]
>
> --
> Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
> Dictatorship naturally arises out of democracy, and the most aggravated
> form of tyranny and slavery out of the most extreme liberty. -- Plato
>
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