avdevice_list_input_sources 2235 fftools/cmdutils.c     if ((ret = avdevice_list_input_sources(fmt, NULL, opts, &device_list)) < 0) {
avdevice_list_input_sources  505 libavdevice/avdevice.h int avdevice_list_input_sources(struct AVInputFormat *device, const char *device_name,