fix：更新gps数据处理

include/video_pipeline.h

@@ -14,9 +14,14 @@ extern "C" {
 
 typedef struct video_pipeline_packet_metadata {
     uint64_t timestamp_ms;
-    uint64_t gps_data;
+    float latitude;
+    float longitude;
 } video_pipeline_packet_metadata_t;
 
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+_Static_assert(sizeof(video_pipeline_packet_metadata_t) == 24, "video trailer metadata must be 24 bytes");
+#endif
+
 typedef struct video_pipeline_config {
     const char *camera_device;
     const char *server_addr;