check_file_extension 1500 libavformat/dashenc.c             if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
check_file_extension 1501 libavformat/dashenc.c                 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
check_file_extension 1502 libavformat/dashenc.c                 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {