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<title>8. Frequently Asked Questions &mdash; OrbbecSDK V2 ROS2 Wrapper documentation</title>
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<li class="toctree-l1"><a class="reference internal" href="../1_overview/overview.html">1. Overview</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../1_overview/introduction.html">1.1. Introduction</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../1_overview/introduction.html#support-hardware-products">1.1.1. Support Hardware Products</a></li>
<li class="toctree-l3"><a class="reference internal" href="../1_overview/introduction.html#orbbec-camera-datasheet">1.1.2. Orbbec camera datasheet</a></li>
<li class="toctree-l3"><a class="reference internal" href="../1_overview/introduction.html#support-platforms">1.1.3. Support Platforms</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../1_overview/orbbecsdk_overview.html">1.2. Orbbec SDK Overview</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../1_overview/orbbecsdk_overview.html#terms">1.2.1. Terms</a></li>
<li class="toctree-l3"><a class="reference internal" href="../1_overview/orbbecsdk_overview.html#orbbec-sdk-v2-architecture-overview">1.2.2. Orbbec SDK v2 Architecture Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="../1_overview/orbbecsdk_overview.html#sdk-concept-overview">1.2.3. SDK Concept Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="../1_overview/orbbecsdk_overview.html#sdk-programming-model">1.2.4. SDK Programming Model</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../2_installation/installation.html">2. Installation</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../2_installation/build_the_package.html">2.1. Build from Source</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../2_installation/build_the_package.html#environment">2.1.1. Environment</a></li>
<li class="toctree-l3"><a class="reference internal" href="../2_installation/build_the_package.html#linux-ros2-wrapper-compilation">2.1.2. Linux ROS2 Wrapper Compilation</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../2_installation/registration_script.html">2.2. Registration script (required)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../3_quickstarts/quickstarts.html">3. Quickstarts</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../3_quickstarts/quickstart.html">3.1. ROS Package QuickStarts</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../3_quickstarts/quickstart.html#introduction">3.1.1. Introduction</a></li>
<li class="toctree-l3"><a class="reference internal" href="../3_quickstarts/quickstart.html#build-your-first-camera-application">3.1.2. Build your First Camera Application</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../3_quickstarts/quickstart.html#step-1-source-ros-2-and-workspace">3.1.2.1. Step 1: Source ROS 2 and Workspace</a></li>
<li class="toctree-l4"><a class="reference internal" href="../3_quickstarts/quickstart.html#step-2-launch-the-camera-node">3.1.2.2. Step 2: Launch the Camera Node</a></li>
<li class="toctree-l4"><a class="reference internal" href="../3_quickstarts/quickstart.html#step-3-visualize-in-rviz2">3.1.2.3. Step 3: Visualize in RViz2</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../3_quickstarts/quickstart.html#sample-features">3.1.3. Sample Features</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../3_quickstarts/quickstart.html#list-available-topics-services-parameters">3.1.3.1. List available topics / services/ parameters</a></li>
<li class="toctree-l4"><a class="reference internal" href="../3_quickstarts/quickstart.html#echo-a-topic">3.1.3.2. Echo a topic</a></li>
<li class="toctree-l4"><a class="reference internal" href="../3_quickstarts/quickstart.html#call-a-service">3.1.3.3. Call a service</a></li>
<li class="toctree-l4"><a class="reference internal" href="../3_quickstarts/quickstart.html#record-with-rosbag2">3.1.3.4. Record with rosbag2</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../3_quickstarts/orbbecviewer.html">3.2. OrbbecViewer QuickStarts</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../3_quickstarts/orbbecviewer.html#download">3.2.1. Download</a></li>
<li class="toctree-l3"><a class="reference internal" href="../3_quickstarts/orbbecviewer.html#connect-the-device">3.2.2. Connect the device</a></li>
<li class="toctree-l3"><a class="reference internal" href="../3_quickstarts/orbbecviewer.html#camera-control">3.2.3. Camera Control</a></li>
<li class="toctree-l3"><a class="reference internal" href="../3_quickstarts/orbbecviewer.html#device-information-and-firmware-upgrade">3.2.4. Device information and firmware upgrade</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../4_application_guide/application_guide.html">4. Application Guide</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/launch_parameters.html">4.1. Launch parameters</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/launch_parameters.html#core-stream-configuration">4.1.1. Core &amp; Stream Configuration</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/launch_parameters.html#sensor-controls">4.1.2. Sensor Controls</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#color-stream">4.1.2.1. Color Stream</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#depth-stream">4.1.2.2. Depth Stream</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#ir-stream">4.1.2.3. IR Stream</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#laser-ldp">4.1.2.4. Laser / LDP</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/launch_parameters.html#device-sync-advanced-features">4.1.3. Device, Sync &amp; Advanced Features</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#multi-camera-synchronization">4.1.3.1. Multi-Camera Synchronization</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#network-cameras">4.1.3.2. Network Cameras</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#device-specific">4.1.3.3. Device-Specific</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#disparity">4.1.3.4. Disparity</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#interleave-ae-mode">4.1.3.5. Interleave AE Mode</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#intra-camera-synchronization">4.1.3.6. Intra-Camera Synchronization</a></li>
</ul>
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<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/launch_parameters.html#basic-general-parameters">4.1.4. Basic &amp; General Parameters</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#firmware-backend">4.1.4.1. Firmware &amp; Backend</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#tf-extrinsics-calibration">4.1.4.2. TF, Extrinsics &amp; Calibration</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#time-synchronization">4.1.4.3. Time Synchronization</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#logging-diagnostics">4.1.4.4. Logging &amp; Diagnostics</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/launch_parameters.html#miscellaneous">4.1.4.5. Miscellaneous</a></li>
</ul>
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<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/launch_parameters.html#imu">4.1.5. IMU</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/launch_parameters.html#depth-filters">4.1.6. Depth Filters</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/services.html">4.2. All available services for camera control</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/services.html#stream-control">4.2.1. Stream Control</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/services.html#color-stream">4.2.1.1. Color Stream</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/services.html#depth-stream">4.2.1.2. Depth Stream</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/services.html#ir-stream">4.2.1.3. IR Stream</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/services.html#all-streams">4.2.1.4. All Streams</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/services.html#sensor-emitter-control">4.2.2. Sensor &amp; Emitter Control</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/services.html#device-information-management">4.2.3. Device Information &amp; Management</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/services.html#synchronization-triggering">4.2.4. Synchronization &amp; Triggering</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/services.html#depth-filter-configuration">4.2.5. Depth Filter Configuration</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/services.html#data-capture-calibration-management">4.2.6. Data Capture &amp; Calibration Management</a></li>
</ul>
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<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/topics.html">4.3. Available Topics</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/topics.html#image-streams">4.3.1. Image Streams</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/topics.html#point-cloud-topics">4.3.2. Point Cloud Topics</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/topics.html#imu-topics">4.3.3. IMU Topics</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/topics.html#device-status-diagnostics">4.3.4. Device Status &amp; Diagnostics</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/coordinate_systems.html">4.4. ROS2 Robot vs Camera Optical Coordination Systems</a></li>
<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#using-ros2-tf-tools">4.5. Using ROS2 TF Tools</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#viewing-the-tf-tree-structure">4.5.1. Viewing the TF Tree Structure</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#visualizing-tf-tree-with-rviz2">4.5.2. Visualizing TF Tree with rviz2</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#camera-tf-calculation-and-publishing-mechanism">4.6. Camera TF Calculation and Publishing Mechanism</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#core-function-obcameranode-calcandpublishstatictransform">4.6.1. Core Function: <code class="docutils literal notranslate"><span class="pre">OBCameraNode::calcAndPublishStaticTransform()</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#quaternion-initialization-and-coordinate-system-transformation">4.6.2. Quaternion Initialization and Coordinate System Transformation</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#obtaining-device-information-and-base-stream">4.6.3. Obtaining Device Information and Base Stream</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#iterating-through-all-streams-and-calculating-relative-transformations">4.6.4. Iterating Through All Streams and Calculating Relative Transformations</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#publishing-tf-transformations">4.6.5. Publishing TF Transformations</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#special-handling-for-left-and-right-ir-cameras">4.6.6. Special Handling for Left and Right IR Cameras</a></li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/coordinate_systems.html#publishing-extrinsics-from-depth-to-other-sensors">4.6.7. Publishing Extrinsics from Depth to Other Sensors</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/camera_sensor_structure.html">4.7. Camera sensor structure</a></li>
<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/tf_transformations.html">4.8. TF from coordinate A to coordinate B:</a></li>
<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/compressed_image.html">4.9. Compressed Image</a></li>
<li class="toctree-l2"><a class="reference internal" href="../4_application_guide/point_cloud.html">4.10. Enabling and Visualizing Point Cloud in ROS 2</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/point_cloud.html#enabling-depth-point-cloud">4.10.1. Enabling Depth Point Cloud</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/point_cloud.html#command-to-enable-depth-point-cloud">4.10.1.1. Command to Enable Depth Point Cloud</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/point_cloud.html#visualizing-depth-point-cloud-in-rviz2">4.10.1.2. Visualizing Depth Point Cloud in RViz2</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../4_application_guide/point_cloud.html#enabling-colored-point-cloud">4.10.2. Enabling Colored Point Cloud</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/point_cloud.html#command-to-enable-colored-point-cloud">4.10.2.1. Command to Enable Colored Point Cloud</a></li>
<li class="toctree-l4"><a class="reference internal" href="../4_application_guide/point_cloud.html#visualizing-colored-point-cloud-in-rviz2">4.10.2.2. Visualizing Colored Point Cloud in RViz2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../5_advanced_guide/advanced_guide.html">5. Advanced Guide</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../5_advanced_guide/advanced_guide.html#performance-optimization">5.1. Performance &amp; Optimization</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/performance/lower_cpu_usage.html">5.1.1. Reducing CPU Usage with Orbbec ROS Package</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/lower_cpu_usage.html#recommended-settings-for-lower-cpu-usage">5.1.1.1. Recommended Settings for Lower CPU Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/lower_cpu_usage.html#launch-files-used-for-testing">5.1.1.2. Launch Files Used for Testing</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/lower_cpu_usage.html#test-environment">5.1.1.3. Test environment</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/lower_cpu_usage.html#test-setup">5.1.1.4. Test Setup</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/lower_cpu_usage.html#test-results">5.1.1.5. Test Results</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/lower_cpu_usage.html#further-optimizationa">5.1.1.6. Further Optimizationa</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/performance/efficient_intra_process_communication.html">5.1.2. Efficient intra-process communication:</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/efficient_intra_process_communication.html#introduction">5.1.2.1. Introduction</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/efficient_intra_process_communication.html#example">5.1.2.2. Example</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/performance/fastdds_tuning.html">5.1.3. Fast DDS Optimization for Orbbec Camera with ROS2</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/fastdds_tuning.html#adjusting-system-parameters">5.1.3.1. Adjusting System Parameters</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/performance/fastdds_tuning.html#fast-dds-configuration">5.1.3.2. Fast DDS Configuration</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../5_advanced_guide/advanced_guide.html#multi-camera">5.2. Multi-Camera</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera.html">5.2.1. Multi-Camera</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera.html#no-data-stream-from-multiple-cameras">5.2.1.1. No Data Stream from Multiple Cameras</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera.html#image-topic-frame-rate-too-low-from-multiple-cameras">5.2.1.2. Image topic frame rate too low from Multiple Cameras</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced.html">5.2.2. Multi_camera synced Instructions</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced.html#setup-instructions">5.2.2.1. Setup instructions</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced.html#checking-camera-port-with-orbbecsdk-ros2">5.2.2.2. Checking camera port with OrbbecSDK_ROS2</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced.html#orbbecsdk-ros2-multi-camera-synced-configuration">5.2.2.3. OrbbecSDK_ROS2 multi-camera synced configuration</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced.html#run-the-following-command-to-start-the-multi-camera-synced">5.2.2.4. Run the following command to start the multi-camera synced</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced_verification_tool.html">5.2.3. Multi_camera_synced_verification_tool</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced_verification_tool.html#directory-structure">5.2.3.1. Directory Structure</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced_verification_tool.html#preparation-for-operation">5.2.3.2. Preparation for operation</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced_verification_tool.html#run-this-example">5.2.3.3. Run this example</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/multi_camera_synced_verification_tool.html#files-that-need-to-be-changed">5.2.3.4. Files that need to be changed</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/multi_camera/gmsl_camera.html">5.2.4. GMSL_camera</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/gmsl_camera.html#single-gmsl-camera">5.2.4.1. Single GMSL camera</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/gmsl_camera.html#multi-gmsl-camera">5.2.4.2. Multi GMSL camera</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/gmsl_camera.html#multi-gmsl-camera-synced">5.2.4.3. Multi GMSL camera synced</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/multi_camera/gmsl_camera.html#usage-limitations-of-gmsl-cameras">5.2.4.4. Usage Limitations of GMSL Cameras</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../5_advanced_guide/advanced_guide.html#configuration-modes">5.3. Configuration &amp; Modes</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/configuration/align_depth_color.html">5.3.1. Aligning Depth to Color in ROS 2</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/align_depth_color.html#commands-to-align-and-view-depth-and-color-images">5.3.1.1. Commands to Align and View Depth and Color Images</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/align_depth_color.html#selecting-topics-in-rviz2">5.3.1.2. Selecting Topics in RViz2</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/align_depth_color.html#example-of-depth-to-color-overlay">5.3.1.3. Example of Depth to Color Overlay</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/configuration/configuration_of_depth_NFOV_and_WFOV_modes.html">5.3.2. Configuration of depth NFOV and WFOV modes</a></li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/configuration/depth_work_mode_switch.html">5.3.3. Depth work mode switch</a></li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/configuration/disparity_search_offset.html">5.3.4. Disparity_search_offset</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/disparity_search_offset.html#function-introduction">5.3.4.1. Function Introduction</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/disparity_search_offset.html#parameter-introduction">5.3.4.2. Parameter Introduction</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/disparity_search_offset.html#run-the-launch">5.3.4.3. Run the launch</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/configuration/interleave_ae_mode.html">5.3.5. Using interleave_ae with Gemini330 series cameras</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/interleave_ae_mode.html#parameter-introduction">5.3.5.1. Parameter Introduction</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/interleave_ae_mode.html#run-the-launch">5.3.5.2. Run the launch</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/interleave_ae_mode.html#multi-camera-synced-interleave-ae">5.3.5.3. Multi_camera_synced + Interleave_ae</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/configuration/predefined_presets.html">5.3.6. Predefined presets</a></li>
<li class="toctree-l3"><a class="reference internal" href="../5_advanced_guide/configuration/net_camera.html">5.3.7. Net_camera</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/net_camera.html#femto-mega-gemini-435le-gemini-335le">5.3.7.1. Femto Mega &amp; Gemini 435Le &amp; Gemini 335Le</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/net_camera.html#set-device-ip-utility">5.3.7.2. set_device_ip Utility</a></li>
<li class="toctree-l4"><a class="reference internal" href="../5_advanced_guide/configuration/net_camera.html#force-ip-function">5.3.7.3. Force IP Function</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../6_benchmark/benchmark.html">6. Benchmark</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../6_benchmark/introduction.html">6.1. Introduction</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../6_benchmark/introduction.html#common-benchmark-node">6.1.1. common benchmark node</a></li>
<li class="toctree-l3"><a class="reference internal" href="../6_benchmark/introduction.html#service-benchmark-node">6.1.2. service benchmark node</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../6_benchmark/benchmark_usage.html">6.2. Benchmark Usage</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../6_benchmark/benchmark_usage.html#using-common-benchmark-node">6.2.1. Using common benchmark node</a></li>
<li class="toctree-l3"><a class="reference internal" href="../6_benchmark/benchmark_usage.html#using-service-benchmark-node">6.2.2. Using service benchmark node</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../6_benchmark/benchmark_usage.html#ros2-c">6.2.2.1. ROS2 C++</a></li>
<li class="toctree-l4"><a class="reference internal" href="../6_benchmark/benchmark_usage.html#ros2-python">6.2.2.2. ROS2 Python</a></li>
<li class="toctree-l4"><a class="reference internal" href="../6_benchmark/benchmark_usage.html#example-yaml-configuration">6.2.2.3. <strong>Example YAML configuration</strong></a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../6_benchmark/benchmark_data.html">6.3. Benchmark Data</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../6_benchmark/benchmark_data.html#common-benckmark-data">6.3.1. Common Benckmark Data</a></li>
<li class="toctree-l3"><a class="reference internal" href="../6_benchmark/benchmark_data.html#service-benchmark-data">6.3.2. Service Benchmark Data</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../6_benchmark/othertools.html">6.4. Other Tools</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../6_benchmark/othertools.html#ob-benchmark-tool">6.4.1. Ob_benchmark tool</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../6_benchmark/othertools.html#tool-configuration-start-benchmark-params-json">6.4.1.1. Tool Configuration (start_benchmark_params.json)</a></li>
<li class="toctree-l4"><a class="reference internal" href="../6_benchmark/othertools.html#camera-configuration-launch-files">6.4.1.2. Camera configuration (launch files)</a></li>
<li class="toctree-l4"><a class="reference internal" href="../6_benchmark/othertools.html#running-the-ob-benchmark-tool">6.4.1.3. Running the ob_benchmark tool</a></li>
<li class="toctree-l4"><a class="reference internal" href="../6_benchmark/othertools.html#output-data-files">6.4.1.4. Output Data Files</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../7_developer_guide/developer_guide.html">7. Developer Guide</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../7_developer_guide/migration_guide.html">7.1. Migrating from main to Open-Source v2-main</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../7_developer_guide/migration_guide.html#introduction">7.1.1. Introduction</a></li>
<li class="toctree-l3"><a class="reference internal" href="../7_developer_guide/migration_guide.html#advantages-of-migrating-from-main-to-v2-main">7.1.2. Advantages of Migrating from main to v2-main</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../7_developer_guide/migration_guide.html#comprehensive-device-support">7.1.2.1. <strong>Comprehensive Device Support</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../7_developer_guide/migration_guide.html#transparency-and-extensibility">7.1.2.2. <strong>Transparency and Extensibility</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../7_developer_guide/migration_guide.html#advantages-in-maintenance-and-updates">7.1.2.3. Advantages in Maintenance and Updates</a></li>
<li class="toctree-l4"><a class="reference internal" href="../7_developer_guide/migration_guide.html#community-and-ecosystem-support">7.1.2.4. <strong>Community and Ecosystem Support</strong></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="../7_developer_guide/migration_guide.html#comparison-between-main-and-v2-main-branches">7.1.3. Comparison Between main and v2-main Branches</a><ul>
<li class="toctree-l4"><a class="reference internal" href="../7_developer_guide/migration_guide.html#launch-file-differences">7.1.3.1. <strong>Launch File Differences</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../7_developer_guide/migration_guide.html#parameter-differences">7.1.3.2. <strong>Parameter Differences</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../7_developer_guide/migration_guide.html#topic-differences">7.1.3.3. <strong>Topic Differences</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="../7_developer_guide/migration_guide.html#service-differences">7.1.3.4. <strong>Service Differences</strong></a></li>
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<li class="toctree-l2"><a class="reference internal" href="../7_developer_guide/building_a_Debian_Package.html">7.2. Building a Debian Package</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../7_developer_guide/building_a_Debian_Package.html#preparing-the-environment">7.2.1. Preparing the Environment</a></li>
<li class="toctree-l3"><a class="reference internal" href="../7_developer_guide/building_a_Debian_Package.html#configuring-ros-dependencies">7.2.2. Configuring ROS Dependencies</a></li>
<li class="toctree-l3"><a class="reference internal" href="../7_developer_guide/building_a_Debian_Package.html#building-the-package">7.2.3. Building the Package</a></li>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">8. Frequently Asked Questions</a><ul>
<li class="toctree-l2"><a class="reference internal" href="#unexpected-crash">8.1. Unexpected Crash</a></li>
<li class="toctree-l2"><a class="reference internal" href="#no-data-stream-from-multiple-cameras">8.2. No Data Stream from Multiple Cameras</a></li>
<li class="toctree-l2"><a class="reference internal" href="#additional-troubleshooting">8.3. Additional Troubleshooting</a></li>
<li class="toctree-l2"><a class="reference internal" href="#why-are-there-so-many-launch-files">8.4. Why Are There So Many Launch Files?</a></li>
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<div class="lang-switch" style="margin:0 0 1em 0; font-size:0.9em;"><a class="lang-other" href="#">中文</a> | <a class="lang-current" href="#">English</a></div><script>(function(){var p=window.location.pathname;var isEn=p.indexOf('/en/')!==-1 && p.indexOf('/zh/')===-1;if(p.indexOf('/zh/')!==-1) isEn=false;var other = isEn ? p.replace(/\/en\//, '/zh/') : p.replace(/\/zh\//, '/en/');var current=p;var sw=document.querySelector('.lang-switch'); if(!sw) return;var o=sw.querySelector('.lang-other'); var c=sw.querySelector('.lang-current');if(isEn){ o.textContent='中文'; c.textContent='English'; } else { o.textContent='English'; c.textContent='中文'; }o.setAttribute('href', other); c.setAttribute('href', current);})();</script><section id="frequently-asked-questions">
<h1><span class="section-number">8. </span>Frequently Asked Questions<a class="headerlink" href="#frequently-asked-questions" title="Link to this heading"></a></h1>
<section id="unexpected-crash">
<h2><span class="section-number">8.1. </span>Unexpected Crash<a class="headerlink" href="#unexpected-crash" title="Link to this heading"></a></h2>
<p>If the camera node crashes unexpectedly, it will generate a crash log in the current running directory: <code class="docutils literal notranslate"><span class="pre">Log/camera_crash_stack_trace_xx.log</span></code>. Please send this log to the support team or submit it to a GitHub issue for further assistance.</p>
</section>
<section id="no-data-stream-from-multiple-cameras">
<h2><span class="section-number">8.2. </span>No Data Stream from Multiple Cameras<a class="headerlink" href="#no-data-stream-from-multiple-cameras" title="Link to this heading"></a></h2>
<p><strong>Insufficient Power Supply</strong>:</p>
<ul class="simple">
<li><p>Ensure that each camera is connected to a separate hub.</p></li>
<li><p>Use a powered hub to provide sufficient power to each camera.</p></li>
</ul>
<p><strong>High Resolution</strong>:</p>
<ul class="simple">
<li><p>Try lowering the resolution to resolve data stream issues.</p></li>
</ul>
<p><strong>Increase usbfs_memory_mb Value</strong>:</p>
<ul class="simple">
<li><p>Increase the <code class="docutils literal notranslate"><span class="pre">usbfs_memory_mb</span></code> value to 128MB (this is a reference value and can be adjusted based on your system’s needs) by running the following command:</p></li>
</ul>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span> <span class="n">echo</span> <span class="mi">128</span> <span class="o">|</span> <span class="n">sudo</span> <span class="n">tee</span> <span class="o">/</span><span class="n">sys</span><span class="o">/</span><span class="n">module</span><span class="o">/</span><span class="n">usbcore</span><span class="o">/</span><span class="n">parameters</span><span class="o">/</span><span class="n">usbfs_memory_mb</span>
</pre></div>
</div>
<ul class="simple">
<li><p>To make this change permanent, check <a class="reference external" href="https://github.com/OpenKinect/libfreenect2/issues/807">this link</a>.</p></li>
</ul>
</section>
<section id="additional-troubleshooting">
<h2><span class="section-number">8.3. </span>Additional Troubleshooting<a class="headerlink" href="#additional-troubleshooting" title="Link to this heading"></a></h2>
<ul class="simple">
<li><p>If you encounter other issues, set the <code class="docutils literal notranslate"><span class="pre">log_level</span></code> parameter to <code class="docutils literal notranslate"><span class="pre">debug</span></code>. This will generate an SDK log file in the running directory: <code class="docutils literal notranslate"><span class="pre">Log/OrbbecSDK.log.txt</span></code>. Please provide this file to the support team for further assistance.</p></li>
<li><p>If firmware logs are required, set <code class="docutils literal notranslate"><span class="pre">enable_heartbeat</span></code> to <code class="docutils literal notranslate"><span class="pre">true</span></code> to activate this feature.</p></li>
</ul>
</section>
<section id="why-are-there-so-many-launch-files">
<h2><span class="section-number">8.4. </span>Why Are There So Many Launch Files?<a class="headerlink" href="#why-are-there-so-many-launch-files" title="Link to this heading"></a></h2>
<ul class="simple">
<li><p>Different cameras have varying default resolutions and image formats.</p></li>
<li><p>To simplify usage, each camera has its own launch file.</p></li>
</ul>
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