diff --git a/openVulkanoCpp/AR/Provider/Playback/ArPlaybackReader.hpp b/openVulkanoCpp/AR/Provider/Playback/ArPlaybackReader.hpp
index 6fdd44e..bf0de68 100644
--- a/openVulkanoCpp/AR/Provider/Playback/ArPlaybackReader.hpp
+++ b/openVulkanoCpp/AR/Provider/Playback/ArPlaybackReader.hpp
@@ -59,9 +59,9 @@ namespace OpenVulkano::AR::Playback
 			m_hasConfidence = m_archiveConfidence.Open(recDir, ".*conf(idence)?" + extensions);
 		}
 
-		int GetNextFrameId()
+		int GetNextFrameId() const
 		{
-			std::string name = m_archiveMetadata.GetDescription().path;
+			const std::string& name = m_archiveMetadata.GetDescription().path;
 			return std::stoi(name.substr(0, name.length() - 5));
 		}
 
@@ -87,6 +87,10 @@ namespace OpenVulkano::AR::Playback
 
 		std::optional<std::pair<FileDescription, Array<char>>> ReadColorImageRaw() { return m_archiveColor.GetNextFile(); }
 
+		auto ReadDepthImageRaw() { return m_archiveDepth.GetNextFile(); }
+
+		auto ReadConfidenceRaw() { return m_archiveConfidence.GetNextFile(); }
+
 		DepthImage ReadDepthImage()
 		{
 			DepthImage img;