ff_framesync_configure   66 libavfilter/dualinput.c     return ff_framesync_configure(&s->fs);
ff_framesync_configure  228 libavfilter/framesync.h int ff_framesync_configure(FFFrameSync *fs);
ff_framesync_configure  270 libavfilter/vf_mergeplanes.c     return ff_framesync_configure(&s->fs);