L'octidi 28 nivôse, an CCXXIII, Kieran Kunhya a écrit : > Oops I misunderstood, you mean the software must comply with the users wishes.
Yes.
> Anyway my argument is that BT601 should be the default for the these
> resolutions.
If you want, but that must happen immediately when the contents enters into
FFmpeg's data structure, not at a random point in the processing chain.
In other words, it should happen immediately when FFmpeg reads contents that
is "probably" BT601:
Input stream #0:0: Video: mpeg2video (Main), yuv420p(tv),
720x576 [SAR 64:45 DAR 16:9]
should be fixed into:
Input stream #0:0: Video: mpeg2video (Main), yuv420p(tv),
720x576 [SAR 512:351 DAR 640:351]
That way, the laws of geometry and arithmetic are respected, the size of the
pixels is correct, and it will work will all encoders, not just nvenc.
Regards,
--
Nicolas George
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