[Libav-user] How set sws_flags in Filter

[Aleksei Komarov]

I recommend not to use sws_sclale at all. It is a real bottleneck of all
encoding process. I had a bad experience using sws_sclale for RGB->YUV
conversion. I replace the ffmpeg ( sws_sclale) conversion with this
https://github.com/lemenkov/libyuv

чт, 25 авг. 2022 г. в 07:53, wolverin via Libav-user <libav-user at ffmpeg.org
>:

> Sorry if the question is stupid )) but I didn't find how to do it
>
> I am using AVFilterContext for scaling because it is multithreaded but
> still slow and I want to specify SWS_FAST_BILINEAR
> I'm trying to specify this (scale work), but I get an error: No such
> filter: 'sws_flags'
>
>         char args[512];
> …
>         snprintf(args, sizeof(args), "scale=%d:%d,sws_flags=1",
>                 pCdcCtxOut->width, pCdcCtxOut->height);
>         if ((rt = avfilter_graph_parse_ptr(pFltGph, args, &pFltInp,
> &pFltOut, NULL)) < 0)
>         {
>             PrintError("Error avfilter_graph_parse_ptr", rt);
>             goto FILTER_END;
>         }
>
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-- 
С уважением Алексей Комаров.
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