[FFmpeg-user] -pix_fmt + pixel format conversions

[Green Koopa]

Nicolas George (2021-07-29):
>
> Green Koopa (12021-07-29):
> > My input file is yuvj420p(pc, bt709). My target output is
> > yuv420p(tv, bt709). I would like to use "-pix_fmt +yuv420p"
> > to specify the output format, and to force me to be explicit
> > in my conversions in the filtergraph. How do I achieve
> > explicit conversions? The format filter appears to trigger
> > implicit conversions.
>
> The format filter does not do the conversions, it only forces the format
> at a certain point in the filter graph.
>
> The standard filter for converting between pixel formats is scale. In
> certain cases, I hear zscale can be more suited, but I never looked at
> the specifics.
>
> Regards,
>
> --
>   Nicolas George
>

Thank you, that helps my understanding. Is there a way to know what
pix_fmts each filter can accept?