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

[Carl Eugen Hoyos]

2016-10-03 13:11 GMT+02:00 Ali KIZIL <alikizil at gmail.com>:
> 2016-10-03 14:09 GMT+03:00 Carl Eugen Hoyos <ceffmpeg at gmail.com>:
>
>> 2016-10-03 12:48 GMT+02:00 Ali KIZIL <alikizil at gmail.com>:
>>
>> > 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;
>>
>> (Apart from "too many parenthesis")
>> I would prefer if alpha gets handled.

> Got it. I dont have any source with alpha.

This is about conversion of frames without alpha into
frames with an alpha channel, so I don't think you need
any source with alpha.
Just set the opacity to 0xFF.

I suspect you should pay attention to the dithering for
the moment though.

Carl Eugen