On Tue, Mar 12, 2019 at 11:45:06 -0300, James Almer wrote:
> > + { "frame-parallel", "Enable frame parallel decodability features",
> > OFFSET(frame_parallel), AV_OPT_TYPE_BOOL,{.i64 = -1}, -1, 1, VE},
>
> A bool with three values is weird. If this is meant to be disabled by
> default, then just make it 0 and remove the >= 0 condition above.
It's actually quite common with ffmpeg options. Such an option can only
be assigned true or false, but if it isn't assigned, it will be e.g. -1
and can be used to trigger a default mode, as is apparently done here
(by not setting this option through the API, probably letting the
library do whatever it considers default).
Cheers,
Moritz
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