1、操作遥控器按钮，psdk进程通过socket发送命令给相机进程 来控制高光谱采集系统；

2、通过FFmpeg采集摄像头视频流并编码为h264，利用psdk推流到遥控器；

sample/api_sample/utils/util_misc.c

@@ -0,0 +1,86 @@
+/**
+ ********************************************************************
+ * @file    util.c
+ * @version V2.0.0
+ * @date    2019/07/01
+ * @brief
+ *
+ * @copyright (c) 2018-2019 DJI. All rights reserved.
+ *
+ * All information contained herein is, and remains, the property of DJI.
+ * The intellectual and technical concepts contained herein are proprietary
+ * to DJI and may be covered by U.S. and foreign patents, patents in process,
+ * and protected by trade secret or copyright law.  Dissemination of this
+ * information, including but not limited to data and other proprietary
+ * material(s) incorporated within the information, in any form, is strictly
+ * prohibited without the express written consent of DJI.
+ *
+ * If you receive this source code without DJI’s authorization, you may not
+ * further disseminate the information, and you must immediately remove the
+ * source code and notify DJI of its removal. DJI reserves the right to pursue
+ * legal actions against you for any loss(es) or damage(s) caused by your
+ * failure to do so.
+ *
+ *********************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include <stdio.h>
+#include "util_misc.h"
+
+/* Private constants ---------------------------------------------------------*/
+
+
+/* Private types -------------------------------------------------------------*/
+
+
+/* Private values ------------------------------------------------------------*/
+
+
+/* Private functions declaration ---------------------------------------------*/
+
+
+/* Exported functions definition ---------------------------------------------*/
+T_PsdkReturnCode PsdkUserUtil_GetCurrentFileDirPath(const char *filePath, uint32_t pathBufferSize, char *dirPath)
+{
+    uint32_t i = strlen(filePath) - 1;
+    uint32_t dirPathLen;
+
+    while (filePath[i] != '/') {
+        i--;
+    }
+
+    dirPathLen = i + 1;
+
+    if (dirPathLen + 1 > pathBufferSize) {
+        return PSDK_ERROR_SYSTEM_MODULE_CODE_INVALID_PARAMETER;
+    }
+
+    memcpy(dirPath, filePath, dirPathLen);
+    dirPath[dirPathLen] = 0;
+
+    return PSDK_ERROR_SYSTEM_MODULE_CODE_SUCCESS;
+}
+
+#if PSDK_ARCH_SYS_LINUX
+
+T_PsdkReturnCode PsdkUserUtil_RunSystemCmd(const char *systemCmdStr)
+{
+    FILE *fp;
+
+    fp = popen(systemCmdStr, "r");
+    if (fp == NULL) {
+        return PSDK_ERROR_SYSTEM_MODULE_CODE_SYSTEM_ERROR;
+    }
+
+    pclose(fp);
+
+    return PSDK_ERROR_SYSTEM_MODULE_CODE_SUCCESS;
+}
+
+#endif
+
+/* Private functions definition-----------------------------------------------*/
+
+
+/****************** (C) COPYRIGHT DJI Innovations *****END OF FILE****/