[FFmpeg-devel] [PATCH] libswscale/swscale_unscaled.c: UHD Resolution Performance Increase for Color Space Convertions / NVENC Related

[Ali KIZIL]

2016-10-03 13:06 GMT+03:00 Carl Eugen Hoyos <ceffmpeg at gmail.com>:

> 2016-10-03 11:35 GMT+02:00 Ali KIZIL <alikizil at gmail.com>:
>
> > +    /* yuv422p10_to_yuv420p */
> > +    if ((srcFormat == AV_PIX_FMT_YUV422P10 || srcFormat ==
> AV_PIX_FMT_YUVA422P10) &&
> > +        (dstFormat == AV_PIX_FMT_YUV420P) || srcFormat ==
> AV_PIX_FMT_YUVA420P)
> > +        c->swscale = yuv422p10ToYuv420pWrapper;
>
> I believe there is something wrong.
>
> The actual wrapper function is missing alpha handling.
>
> Carl Eugen
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>

Hello Carl,

Yes, Alpha channel is not managed.

So it should be;

> +    /* yuv422p10_to_yuv420p */
> +    if ((srcFormat == AV_PIX_FMT_YUV422P10) &&
> +        (dstFormat == AV_PIX_FMT_YUV420P))
> +        c->swscale = yuv422p10ToYuv420pWrapper;

I will get it corrected after collecting all comments.