[FFmpeg-devel] [PATCH] Added more commandline options for libaom encoder.

[Moritz Barsnick]

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