* optimize rtmp

components/vision/include/maix_rtmp.hpp

@@ -14,7 +14,8 @@
 #include <stdexcept>
 #include <pthread.h>
 
-namespace maix {
+namespace maix::rtmp
+{
     /**
      * Rtmp class
      * @maixpy maix.rtmp.Rtmp
@@ -116,7 +117,7 @@ namespace maix {
 
         /**
          * @brief Get the file path of the push stream
-         * @return error code, err::ERR_NONE means success, others means failed
+         * @return file path
          * @maixpy maix.rtmp.Rtmp.get_path
         */
         std::string get_path() {
@@ -125,7 +126,7 @@ namespace maix {
 
         /**
          * @brief Check whether push streaming has started
-         * @return error code, err::ERR_NONE means success, others means failed
+         * @return If rtmp thread is running, returns true
          * @maixpy maix.rtmp.Rtmp.get_path
         */
         bool is_started() {

components/vision/port/maixcam/maix_rtmp_maixcam.cpp

@@ -22,7 +22,7 @@ static int rtmp_client_send(void* param, const void* header, size_t len, const v
 	return socket_send_v_all_by_time(*socket, vec, bytes > 0 ? 2 : 1, 0, 5000);
 }
 
-namespace maix {
+namespace maix::rtmp {
 	Rtmp::Rtmp(std::string host, int port, std::string app, std::string stream) {
 		_host = host;
 		_port = port;

examples/rtmp_demo/main/src/main.cpp

@@ -49,7 +49,7 @@ int _main(int argc, char* argv[])
         std::string file = argv[5];
         printf("push %s to rtmp://%s:%d/%s/%s!\r\n", &file[0], &host[0], port, &app[0], &stream[0]);
 
-        Rtmp rtmp = Rtmp(host, port, app, stream);
+        rtmp::Rtmp rtmp = rtmp::Rtmp(host, port, app, stream);
 
         log::info("start\r\n");
         rtmp.start(file);