diff --git a/src/av/AvTranscoder.cpp b/src/av/AvTranscoder.cpp
index 4d02191c..35ea8162 100644
--- a/src/av/AvTranscoder.cpp
+++ b/src/av/AvTranscoder.cpp
@@ -43,7 +43,7 @@ static std::vector<EncodingInfo> encodingInfos =
 	{Encoding::M4A, "audio/mp4", 5},
 };
 
-std::string encoding_to_mimetype(Encoding encoding)
+std::string encodingToMimetype(Encoding encoding)
 {
 	for (auto encodingInfo : encodingInfos)
 	{
@@ -54,7 +54,7 @@ std::string encoding_to_mimetype(Encoding encoding)
 	throw std::logic_error("encoding_to_mimetype failed!");
 }
 
-int encoding_to_int(Encoding encoding)
+int encodingToInt(Encoding encoding)
 {
 	for (auto encodingInfo : encodingInfos)
 	{
@@ -65,7 +65,7 @@ int encoding_to_int(Encoding encoding)
 	throw std::logic_error("encoding_to_int failed!");
 }
 
-Encoding encoding_from_int(int encodingId)
+Encoding encodingFromInt(int encodingId)
 {
 	for (auto encodingInfo : encodingInfos)
 	{
@@ -136,10 +136,10 @@ Transcoder::start()
 	args.push_back("-nostdin");
 
 	// input Offset
-	if (_parameters.offset.total_seconds() > 0)
+	if (_parameters.offset)
 	{
 		args.push_back("-ss");
-		args.push_back(std::to_string(_parameters.offset.total_seconds()));
+		args.push_back(std::to_string((*_parameters.offset).count()));
 	}
 
 	// Input file
diff --git a/src/av/AvTranscoder.hpp b/src/av/AvTranscoder.hpp
index 73e10ec5..144ea5d6 100644
--- a/src/av/AvTranscoder.hpp
+++ b/src/av/AvTranscoder.hpp
@@ -24,7 +24,6 @@
 
 #include <pstreams/pstream.h>
 
-#include <boost/date_time/posix_time/posix_time_types.hpp> //no i/o just types
 #include <boost/filesystem.hpp>
 #include <boost/optional.hpp>
 
@@ -42,16 +41,16 @@ enum class Encoding
 	M4A,
 };
 
-std::string encoding_to_mimetype(Encoding encoding);
-int encoding_to_int(Encoding encoding);
-Encoding encoding_from_int(int encoding);
+std::string encodingToMimetype(Encoding encoding);
+int encodingToInt(Encoding encoding);
+Encoding encodingFromInt(int encoding);
 
 struct TranscodeParameters
 {
 	Encoding	encoding = Encoding::MP3;
-	boost::optional<std::size_t> stream = boost::none; // Id of the stream to be transcoded (auto detect by default)
 	std::size_t	bitrate = 128000;
-	boost::posix_time::time_duration offset = boost::posix_time::seconds(0);
+	boost::optional<std::size_t> stream = boost::none; // Id of the stream to be transcoded (auto detect by default)
+	boost::optional<std::chrono::seconds> offset;
 
 	TranscodeParameters() {}
 };
diff --git a/src/ui/MediaPlayer.cpp b/src/ui/MediaPlayer.cpp
index b4fd2816..f2fbe015 100644
--- a/src/ui/MediaPlayer.cpp
+++ b/src/ui/MediaPlayer.cpp
@@ -56,7 +56,7 @@ MediaPlayer::playTrack(Database::Track::id_type trackId)
 	{
 		Av::MediaFile mediaFile(track->getPath());
 
-		auto resource = LmsApp->getTranscodeResource()->getUrl(trackId, Av::Encoding::MP3, boost::posix_time::seconds(0));
+		auto resource = LmsApp->getTranscodeResource()->getUrl(trackId, Av::Encoding::MP3);
 		auto imgResource = LmsApp->getImageResource()->getTrackUrl(trackId, 64);
 
 		std::ostringstream oss;
diff --git a/src/ui/resource/TranscodeResource.cpp b/src/ui/resource/TranscodeResource.cpp
index f1b0755d..926dd040 100644
--- a/src/ui/resource/TranscodeResource.cpp
+++ b/src/ui/resource/TranscodeResource.cpp
@@ -40,10 +40,9 @@ TranscodeResource:: ~TranscodeResource()
 }
 
 std::string
-TranscodeResource::getUrl(Database::Track::id_type trackId, Av::Encoding encoding, boost::posix_time::time_duration offset) const
+TranscodeResource::getUrl(Database::Track::id_type trackId, Av::Encoding encoding) const
 {
-	std::string res = url()+ "&trackid=" + std::to_string(trackId) + "&encoding=" + std::to_string(Av::encoding_to_int(encoding));
-	res += "&offset=" + std::to_string(offset.seconds());
+	std::string res = url()+ "&trackid=" + std::to_string(trackId) + "&encoding=" + std::to_string(Av::encodingToInt(encoding));
 
 	return res;
 }
@@ -81,11 +80,11 @@ TranscodeResource::handleRequest(const Wt::Http::Request& request,
 
 			auto offsetStr = request.getParameter("offset");
 			if (offsetStr)
-				parameters.offset = boost::posix_time::seconds(std::stol(*offsetStr));
+				parameters.offset = std::chrono::seconds(std::stol(*offsetStr));
 
 			auto encodingStr = request.getParameter("encoding");
 			if (encodingStr)
-				parameters.encoding = Av::encoding_from_int(std::stol(*encodingStr));
+				parameters.encoding = Av::encodingFromInt(std::stol(*encodingStr));
 
 			auto streamStr = request.getParameter("stream");
 			if (streamStr)
@@ -116,7 +115,7 @@ TranscodeResource::handleRequest(const Wt::Http::Request& request,
 			transcoder = std::make_shared<Av::Transcoder>(track->getPath(), parameters);
 		}
 
-		std::string mimeType = Av::encoding_to_mimetype(transcoder->getParameters().encoding);
+		std::string mimeType = Av::encodingToMimetype(transcoder->getParameters().encoding);
 
 		LMS_LOG(UI, DEBUG) << "Mime type set to '" << mimeType << "'";
 		response.setMimeType(mimeType);
diff --git a/src/ui/resource/TranscodeResource.hpp b/src/ui/resource/TranscodeResource.hpp
index 02847e53..b3842541 100644
--- a/src/ui/resource/TranscodeResource.hpp
+++ b/src/ui/resource/TranscodeResource.hpp
@@ -35,7 +35,7 @@ class TranscodeResource : public Wt::WResource
 		TranscodeResource(Database::Handler& db);
 		~TranscodeResource();
 
-		std::string getUrl(Database::Track::id_type trackId, Av::Encoding encoding, boost::posix_time::time_duration offset) const;
+		std::string getUrl(Database::Track::id_type trackId, Av::Encoding encoding) const;
 
 		void handleRequest(const Wt::Http::Request& request,
 				Wt::Http::Response& response);
diff --git a/src/utils/Utils.cpp b/src/utils/Utils.cpp
index f65287b5..07700578 100644
--- a/src/utils/Utils.cpp
+++ b/src/utils/Utils.cpp
@@ -21,7 +21,6 @@
 #include <sstream>
 #include <iomanip>
 
-#include <boost/date_time/posix_time/posix_time.hpp>
 #include <boost/algorithm/string/split.hpp>
 #include <boost/algorithm/string.hpp>
 
@@ -77,18 +76,6 @@ bool readList(const std::string& str, const std::string& separators, std::list<s
 	return !str.empty();
 }
 
-std::string
-durationToString(boost::posix_time::time_duration duration, std::string format)
-{
-	boost::posix_time::time_facet* facet = new boost::posix_time::time_facet();
-	facet->time_duration_format(format.c_str());
-	std::ostringstream oss;
-	oss.imbue(std::locale(oss.getloc(), facet));
-	oss << duration;
-
-	return oss.str();
-}
-
 std::vector<std::string>
 splitString(std::string string, std::string separators)
 {
diff --git a/src/utils/Utils.hpp b/src/utils/Utils.hpp
index 61674756..497eac91 100644
--- a/src/utils/Utils.hpp
+++ b/src/utils/Utils.hpp
@@ -32,9 +32,6 @@
 bool
 readList(const std::string& str, const std::string& separators, std::list<std::string>& results);
 
-//std::string
-//durationToString(boost::posix_time::time_duration duration, std::string format);
-
 std::vector<std::string>
 splitString(std::string string, std::string separators);