[FFmpeg-devel] [PATCH] avfilter: add motion filter

[Reimar Döffinger]

On 13.07.2017, at 16:49, Derek Buitenhuis <derek.buitenhuis at gmail.com> wrote:

> On 7/13/2017 3:11 PM, wm4 wrote:
>> We definitely use some C99 constructs in FFmpeg, but normally we don't
>> use stdbool.h.
> 
> Yeah, but we disallow others (like VLAs), so, yeah.

I think it's more of a case of "there is no really convincing use-case for bool and if you are not careful it might cause really bad performance in code not looking like it".
So I'd consider it discouraged at least.
Plus, very few other projects seem to use it, so not using it seems pretty consistent :)