hw_device_init_from_string  658 fftools/ffmpeg.h int hw_device_init_from_string(const char *arg, HWDevice **dev);
hw_device_init_from_string  545 fftools/ffmpeg_opt.c     err = hw_device_init_from_string(tmp, NULL);
hw_device_init_from_string  562 fftools/ffmpeg_opt.c         return hw_device_init_from_string(arg, NULL);