diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 54757c3..4261e63 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -132,6 +132,10 @@ Norman Thiel
 
 vel_tins
   for reporting that externremux x264 uses value of ABR for VBR
+  for various suggestions to improve externremux.sh
 
 Matthias Prill
   for reporting a compiler error with older libstdc++ versions
+
+Timothy D. Lenz
+  for reporting missing support for invisible channel groups in HTTP menu
diff --git a/HISTORY b/HISTORY
index 7624838..e0a4789 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,6 +1,29 @@
 VDR Plugin 'streamdev' Revision History
 ---------------------------------------
 
+- VTP no longer uses a static priority value for its server-side receivers.
+  The server stores channel and priority requested with the PROV command and
+  re-uses these values in a subsequent TUNE for the same channel. The new
+  PRIO command is used to update the receiver's priority if necessary.
+- added parameter HEIGHT to externremux.sh
+- fixed syslog messages reporting local instead of remote IP and port
+- log an error if externremux.sh is missing or not executable
+- added dsyslog messages to help troubleshouting channel switch issues
+- VTP command SUSP didn't attach the player to the primary device
+- replacing a connections receiver is now an atomic operation. Solves
+  stuttering audio/video due to lost TS packets when adding/removing PIDs
+- fixed missing support for invisible channel groups (groups without name)
+  in HTTP menu (reported by Timothy D. Lenz)
+- don't quote actual program call in externremux.sh, so you can run th
+  program through e.g. nice or taskset just by extending the variable
+  which holds the program name
+- in externremux.sh each mencoder audio and video codec has a dedicated
+  variable for a default option string now. Still you can override each
+  default option with an URL parameter
+- externremux.sh mencoder now uses scale parameter with negative height
+  instead of -xy for scaling (suggested by vel_tins@vdrportal)
+- added FPS (frames per second) parameter to externremux.sh (suggested by
+  vel_tins@vdrportal)
 - don't use std::map.at(). It's not available in older libstdc++ version
   (reported by Matthias Prill)
 - fixed extremux x264 using value of ABR for VBR (thanks to vel_tins@vdrportal)
diff --git a/client/device.c b/client/device.c
index 581176f..bbdaf6a 100644
--- a/client/device.c
+++ b/client/device.c
@@ -1,5 +1,5 @@
 /*
- *  $Id: device.c,v 1.18.2.3 2010/06/08 05:56:15 schmirl Exp $
+ *  $Id: device.c,v 1.18.2.4 2010/08/18 10:26:18 schmirl Exp $
  */
  
 #include "client/device.h"
@@ -8,6 +8,7 @@
 
 #include "tools/select.h"
 
+#include <vdr/config.h>
 #include <vdr/channels.h>
 #include <vdr/ringbuffer.h>
 #include <vdr/eit.h>
@@ -32,6 +33,7 @@ cStreamdevDevice::cStreamdevDevice(void) {
 
 	m_Device = this;
 	m_Pids = 0;
+	m_Priority = -1;
 	m_DvrClosed = true;
 }
 
@@ -108,7 +110,7 @@ bool cStreamdevDevice::ProvidesChannel(const cChannel *Channel, int Priority,
 		res = prio && ClientSocket.ProvidesChannel(Channel, Priority);
 		ndr = true;
 	}
-	
+
 	if (NeedsDetachReceivers)
 		*NeedsDetachReceivers = ndr;
 	Dprintf("prov res = %d, ndr = %d\n", res, ndr);
@@ -119,6 +121,9 @@ bool cStreamdevDevice::SetChannelDevice(const cChannel *Channel,
 		bool LiveView) {
 	Dprintf("SetChannelDevice Channel: %s, LiveView: %s\n", Channel->Name(),
 			LiveView ? "true" : "false");
+	LOCK_THREAD;
+
+	m_UpdatePriority = ClientSocket.SupportsPrio();
 
 	if (LiveView)
 		return false;
@@ -139,6 +144,8 @@ bool cStreamdevDevice::SetPid(cPidHandle *Handle, int Type, bool On) {
 			Handle->used);
 	LOCK_THREAD;
 
+	m_UpdatePriority = ClientSocket.SupportsPrio();
+
 	if (On && !m_TSBuffer) {
 		Dprintf("SetPid: no data connection -> OpenDvr()");
 		OpenDvrInt();
@@ -305,3 +312,16 @@ bool cStreamdevDevice::ReInit(void) {
 	return StreamdevClientSetup.StartClient ? Init() : true;
 }
 
+void cStreamdevDevice::UpdatePriority(void) {
+	if (m_Device) {
+		m_Device->Lock();
+		if (m_Device->m_UpdatePriority && ClientSocket.DataSocket(siLive)) {
+			int Priority = m_Device->Priority();
+			if (m_Device == cDevice::ActualDevice() && Priority < Setup.PrimaryLimit)
+				Priority = Setup.PrimaryLimit;
+			if (m_Device->m_Priority != Priority && ClientSocket.SetPriority(Priority))
+				m_Device->m_Priority = Priority;
+		}
+		m_Device->Unlock();
+	}
+}
diff --git a/client/device.h b/client/device.h
index ada66de..909e015 100644
--- a/client/device.h
+++ b/client/device.h
@@ -1,5 +1,5 @@
 /*
- *  $Id: device.h,v 1.7.2.1 2008/04/07 15:07:39 schmirl Exp $
+ *  $Id: device.h,v 1.7.2.2 2010/08/18 10:26:18 schmirl Exp $
  */
  
 #ifndef VDR_STREAMDEV_DEVICE_H
@@ -15,13 +15,14 @@ class cTBString;
 #define CMD_LOCK_OBJ(x) cMutexLock CmdLock((cMutex*)&(x)->m_Mutex)
 
 class cStreamdevDevice: public cDevice {
-	friend class cRemoteRecordings;
 
 private:
 	const cChannel      *m_Channel;
 	cTSBuffer           *m_TSBuffer;
 	cStreamdevFilters   *m_Filters;
 	int                  m_Pids;
+	int                  m_Priority;
+	bool                 m_UpdatePriority;
 	bool                 m_DvrClosed;
 
 	static cStreamdevDevice *m_Device;
@@ -56,6 +57,7 @@ public:
 			bool *NeedsDetachReceivers = NULL) const;
 	virtual bool IsTunedToTransponder(const cChannel *Channel);
 
+	static void UpdatePriority(void);
 	static bool Init(void);
 	static bool ReInit(void);
 
diff --git a/client/socket.c b/client/socket.c
index e766f7c..f2b5eea 100644
--- a/client/socket.c
+++ b/client/socket.c
@@ -1,5 +1,5 @@
 /*
- *  $Id: socket.c,v 1.11.2.1 2010/06/08 05:56:15 schmirl Exp $
+ *  $Id: socket.c,v 1.11.2.3 2010/08/18 10:26:18 schmirl Exp $
  */
  
 #include <tools/select.h>
@@ -21,6 +21,7 @@ cClientSocket ClientSocket;
 cClientSocket::cClientSocket(void) 
 {
 	memset(m_DataSockets, 0, sizeof(cTBSocket*) * si_Count);
+	m_Prio = false;
 	Reset();
 }
 
@@ -143,8 +144,14 @@ bool cClientSocket::CheckConnection(void) {
 	if(Command("CAPS FILTERS", 220))
 		Filters = ",FILTERS";
 
-	isyslog("Streamdev: Connected to server %s:%d using capabilities TSPIDS%s",
-	        RemoteIp().c_str(), RemotePort(), Filters);
+	const char *Prio = "";
+	if(Command("CAPS PRIO", 220)) {
+		Prio = ",PRIO";
+		m_Prio = true;
+	}
+
+	isyslog("Streamdev: Connected to server %s:%d using capabilities TSPIDS%s%s",
+	        RemoteIp().c_str(), RemotePort(), Filters, Prio);
 	return true;
 }
 
@@ -242,7 +249,7 @@ bool cClientSocket::SetChannelDevice(const cChannel *Channel) {
 	CMD_LOCK;
 
 	std::string command = (std::string)"TUNE " 
-	                    + (const char*)Channel->GetChannelID().ToString();
+				+ (const char*)Channel->GetChannelID().ToString();
 	if (!Command(command, 220)) {
 		if (errno == 0)
 			esyslog("ERROR: Streamdev: Couldn't tune %s:%d to channel %s",
@@ -252,6 +259,21 @@ bool cClientSocket::SetChannelDevice(const cChannel *Channel) {
 	return true;
 }
 
+bool cClientSocket::SetPriority(int Priority) {
+	if (!CheckConnection()) return false;
+
+	CMD_LOCK;
+
+	std::string command = (std::string)"PRIO " + (const char*)itoa(Priority);
+	if (!Command(command, 220)) {
+		if (errno == 0)
+			esyslog("Streamdev: Failed to update priority on %s:%d", RemoteIp().c_str(), 
+			        RemotePort());
+		return false;
+	}
+	return true;
+}
+
 bool cClientSocket::SetPid(int Pid, bool On) {
 	if (!CheckConnection()) return false;
 
@@ -260,8 +282,8 @@ bool cClientSocket::SetPid(int Pid, bool On) {
 	std::string command = (std::string)(On ? "ADDP " : "DELP ") + (const char*)itoa(Pid);
 	if (!Command(command, 220)) {
 		if (errno == 0)
-			esyslog("Streamdev: Pid %d not available from %s:%d", Pid, LocalIp().c_str(), 
-			        LocalPort());
+			esyslog("Streamdev: Pid %d not available from %s:%d", Pid, RemoteIp().c_str(), 
+			        RemotePort());
 		return false;
 	}
 	return true;
@@ -277,7 +299,7 @@ bool cClientSocket::SetFilter(ushort Pid, uchar Tid, uchar Mask, bool On) {
 	if (!Command(command, 220)) {
 		if (errno == 0)
 				esyslog("Streamdev: Filter %hu, %hhu, %hhu not available from %s:%d", 
-						Pid, Tid, Mask, LocalIp().c_str(), LocalPort());
+						Pid, Tid, Mask, RemoteIp().c_str(), RemotePort());
 		return false;
 	}
 	return true;
diff --git a/client/socket.h b/client/socket.h
index 3b86304..1608bb4 100644
--- a/client/socket.h
+++ b/client/socket.h
@@ -1,5 +1,5 @@
 /*
- *  $Id: socket.h,v 1.6.2.1 2010/06/08 05:56:15 schmirl Exp $
+ *  $Id: socket.h,v 1.6.2.2 2010/08/18 10:26:18 schmirl Exp $
  */
  
 #ifndef VDR_STREAMDEV_CLIENT_CONNECTION_H
@@ -20,6 +20,7 @@ private:
 	cTBSocket    *m_DataSockets[si_Count];
 	cMutex        m_Mutex;
 	char          m_Buffer[BUFSIZ + 1]; // various uses
+	bool          m_Prio; // server supports command PRIO
 
 protected:
 	/* Send Command, and return true if the command results in Expected. 
@@ -45,6 +46,8 @@ public:
 	bool CreateDataConnection(eSocketId Id);
 	bool CloseDataConnection(eSocketId Id);
 	bool SetChannelDevice(const cChannel *Channel);
+	bool SupportsPrio() { return m_Prio; }
+	bool SetPriority(int Priority);
 	bool SetPid(int Pid, bool On);
 	bool SetFilter(ushort Pid, uchar Tid, uchar Mask, bool On);
 	bool CloseDvr(void);
diff --git a/i18n.h b/i18n.h
index c2eeceb..9d90f97 100644
--- a/i18n.h
+++ b/i18n.h
@@ -1,5 +1,5 @@
 /*
- *  $Id: i18n.h,v 1.1 2004/12/30 22:43:58 lordjaxom Exp $
+ *  $Id: i18n.h,v 1.1.1.1 2004/12/30 22:43:58 lordjaxom Exp $
  */
  
 #ifndef VDR_STREAMDEV_I18N_H
diff --git a/remux/extern.c b/remux/extern.c
index d66dc0a..cf766d3 100644
--- a/remux/extern.c
+++ b/remux/extern.c
@@ -191,6 +191,11 @@ cTSExt::cTSExt(cRingBufferLinear *ResultBuffer, const cServerConnection *Connect
 		if (setpgid(0, 0) == -1)
 			esyslog("streamdev-server: externremux setpgid failed: %m");
 
+		if (access(opt_remux, X_OK) == -1) {
+			esyslog("streamdev-server %s: %m", opt_remux);
+			_exit(-1);
+		}
+
 		if (execle("/bin/sh", "sh", "-c", opt_remux, NULL, env) == -1) {
 			esyslog("streamdev-server: externremux script '%s' execution failed: %m", opt_remux);
 			_exit(-1);
diff --git a/server/connection.c b/server/connection.c
index 6bcbd1e..4096092 100644
--- a/server/connection.c
+++ b/server/connection.c
@@ -1,5 +1,5 @@
 /*
- *  $Id: connection.c,v 1.10.2.3 2010/07/19 13:50:14 schmirl Exp $
+ *  $Id: connection.c,v 1.10.2.4 2010/08/03 10:56:58 schmirl Exp $
  */
  
 #include "server/connection.h"
@@ -254,12 +254,16 @@ cDevice *cServerConnection::GetDevice(const cChannel *Channel, int Priority)
 			}
 			Dprintf(" * Found device for live tv: %p (%d)\n", newdev,
 					newdev ? newdev->CardIndex() + 1 : 0);
-			if (newdev == NULL || newdev == device)
+			if (newdev == NULL || newdev == device) {
 				// no suitable device to continue live TV, giving up...
 				device = NULL;
+				dsyslog("streamdev: Not providing channel %s at priority %d - live TV not suspended", Channel->Name(), Priority);
+			}
 			else
 				newdev->SwitchChannel(current, true);
 		}
+		else if (!device)
+			dsyslog("streamdev: No device provides channel %s at priority %d", Channel->Name(), Priority);
 	}
 
 	return device;
diff --git a/server/connectionVTP.c b/server/connectionVTP.c
index 91d9265..b98f094 100644
--- a/server/connectionVTP.c
+++ b/server/connectionVTP.c
@@ -1,5 +1,5 @@
 /*
- *  $Id: connectionVTP.c,v 1.18.2.7 2010/07/19 13:50:14 schmirl Exp $
+ *  $Id: connectionVTP.c,v 1.18.2.9 2010/08/18 10:26:19 schmirl Exp $
  */
  
 #include "server/connectionVTP.h"
@@ -726,6 +726,8 @@ cConnectionVTP::cConnectionVTP(void):
 		m_StreamType(stTSPIDS),
 		m_FiltersSupport(false),
 		m_RecPlayer(NULL),
+		m_TuneChannel(NULL),
+		m_TunePriority(0),
 		m_LSTEHandler(NULL),
 		m_LSTCHandler(NULL),
 		m_LSTTHandler(NULL),
@@ -816,6 +818,7 @@ bool cConnectionVTP::Command(char *Cmd)
 	else if (strcasecmp(Cmd, "READ") == 0) return CmdREAD(param);
 	else if (strcasecmp(Cmd, "TUNE") == 0) return CmdTUNE(param);
 	else if (strcasecmp(Cmd, "PLAY") == 0) return CmdPLAY(param);
+	else if (strcasecmp(Cmd, "PRIO") == 0) return CmdPRIO(param);
 	else if (strcasecmp(Cmd, "ADDP") == 0) return CmdADDP(param);
 	else if (strcasecmp(Cmd, "DELP") == 0) return CmdDELP(param);
 	else if (strcasecmp(Cmd, "ADDF") == 0) return CmdADDF(param);
@@ -874,6 +877,11 @@ bool cConnectionVTP::CmdCAPS(char *Opts)
 		return Respond(220, "Capability \"%s\" accepted", Opts);
 	}
 
+	// Command PRIO is known
+	if (strcasecmp(Opts, "PRIO") == 0) {
+		return Respond(220, "Capability \"%s\" accepted", Opts);
+	}
+
 	return Respond(561, "Capability \"%s\" not known", Opts);
 }
 
@@ -891,9 +899,15 @@ bool cConnectionVTP::CmdPROV(char *Opts)
 	if ((chan = ChannelFromString(Opts)) == NULL)
 		return Respond(550, "Undefined channel \"%s\"", Opts);
 
-	return GetDevice(chan, prio) != NULL
-			? Respond(220, "Channel available")
-			: Respond(560, "Channel not available");
+	if (GetDevice(chan, prio)) {
+		m_TuneChannel = chan;
+		m_TunePriority = prio;
+		return Respond(220, "Channel available");
+	}
+	else {
+		m_TuneChannel = NULL;
+		return Respond(560, "Channel not available");
+	}
 }
 
 bool cConnectionVTP::CmdPORT(char *Opts) 
@@ -1047,18 +1061,23 @@ bool cConnectionVTP::CmdTUNE(char *Opts)
 {
 	const cChannel *chan;
 	cDevice *dev;
+	int prio = m_TunePriority;
 	
 	if ((chan = ChannelFromString(Opts)) == NULL)
 		return Respond(550, "Undefined channel \"%s\"", Opts);
 
-	if ((dev = GetDevice(chan, 0)) == NULL)
+	if (chan != m_TuneChannel) {
+		esyslog("streamdev-server TUNE %s: Priority unknown - using 0", Opts);
+		prio = 0;
+	}
+	if ((dev = GetDevice(chan, prio)) == NULL)
 		return Respond(560, "Channel not available");
 
 	if (!dev->SwitchChannel(chan, false))
 		return Respond(560, "Channel not available");
 
 	delete m_LiveStreamer;
-	m_LiveStreamer = new cStreamdevLiveStreamer(1, this);
+	m_LiveStreamer = new cStreamdevLiveStreamer(prio, this);
 	m_LiveStreamer->SetChannel(chan, m_StreamType);
 	m_LiveStreamer->SetDevice(dev);
 	if(m_LiveSocket)
@@ -1099,6 +1118,22 @@ bool cConnectionVTP::CmdPLAY(char *Opts)
 	}
 }
 
+bool cConnectionVTP::CmdPRIO(char *Opts) 
+{
+	int prio;
+	char *end;
+
+	prio = strtoul(Opts, &end, 10);
+	if (end == Opts || (*end != '\0' && *end != ' '))
+		return Respond(500, "Use: PRIO Priority");
+
+	if (m_LiveStreamer) {
+		m_LiveStreamer->SetPriority(prio);
+		return Respond(220, "Priority changed to %d", prio);
+	}
+	return Respond(550, "Priority not applicable");
+}
+
 bool cConnectionVTP::CmdADDP(char *Opts) 
 {
 	int pid;
@@ -1223,6 +1258,7 @@ bool cConnectionVTP::CmdSUSP(void)
 	else if (StreamdevServerSetup.SuspendMode == smOffer 
 			&& StreamdevServerSetup.AllowSuspend) {
 		cControl::Launch(new cSuspendCtl);
+		cControl::Attach();
 		return Respond(220, "Server is suspended");
 	} else
 		return Respond(550, "Client may not suspend server");
diff --git a/server/connectionVTP.h b/server/connectionVTP.h
index b938fe6..ee842fe 100644
--- a/server/connectionVTP.h
+++ b/server/connectionVTP.h
@@ -31,6 +31,11 @@ private:
 	bool                    m_FiltersSupport;
 	RecPlayer              *m_RecPlayer;
 
+	// Priority is only known in PROV command
+	// Store in here for later use in TUNE call
+	const cChannel         *m_TuneChannel;
+	int                     m_TunePriority;
+
 	// Members adopted for SVDRP
 	cLSTEHandler *m_LSTEHandler;
 	cLSTCHandler *m_LSTCHandler;
@@ -59,6 +64,7 @@ public:
 	bool CmdREAD(char *Opts);
 	bool CmdTUNE(char *Opts);
 	bool CmdPLAY(char *Opts);
+	bool CmdPRIO(char *Opts);
 	bool CmdADDP(char *Opts);
 	bool CmdDELP(char *Opts);
 	bool CmdADDF(char *Opts);
diff --git a/server/livestreamer.c b/server/livestreamer.c
index ff4f708..7ec7d9e 100644
--- a/server/livestreamer.c
+++ b/server/livestreamer.c
@@ -297,7 +297,7 @@ void cStreamdevPatFilter::Process(u_short Pid, u_char Tid, const u_char *Data, i
 							if (written != TS_SIZE)
 								siBuffer.ReportOverflow(TS_SIZE - written);
 							if (pmtPid != prevPmtPid) {
-								m_Streamer->SetPids(pmtPid);
+								m_Streamer->SetPid(pmtPid, true);
 								Add(pmtPid, 0x02);
 								pmtVersion = -1;
 							}
@@ -442,21 +442,28 @@ bool cStreamdevLiveStreamer::SetPids(int Pid, const int *Pids1, const int *Pids2
 	return true;
 }
 
+void cStreamdevLiveStreamer::SetPriority(int Priority)
+{
+	m_Priority = Priority;
+	StartReceiver();
+}
+
 void cStreamdevLiveStreamer::StartReceiver(void)
 {
-	DELETENULL(m_Receiver);
-	if (m_NumPids > 0) {
+	if (m_Device != NULL && m_NumPids > 0 && IsRunning()) {
 		Dprintf("Creating Receiver to respect changed pids\n");
+		cReceiver *current = m_Receiver;
 #if VDRVERSNUM < 10500
 		m_Receiver = new cStreamdevLiveReceiver(this, m_Channel->Ca(), m_Priority, m_Pids);
 #else
 		m_Receiver = new cStreamdevLiveReceiver(this, m_Channel->GetChannelID(), m_Priority, m_Pids);
 #endif
-		if (IsRunning() && m_Device != NULL) {
-			Dprintf("Attaching new receiver\n");
-			Attach();
-		}
+		cThreadLock ThreadLock(m_Device);
+		Attach();
+		delete current;
 	}
+	else
+		DELETENULL(m_Receiver);
 }
 
 bool cStreamdevLiveStreamer::SetChannel(const cChannel *Channel, eStreamType StreamType, const int* Apid, const int *Dpid) 
diff --git a/server/livestreamer.h b/server/livestreamer.h
index 283a395..71feb4c 100644
--- a/server/livestreamer.h
+++ b/server/livestreamer.h
@@ -38,6 +38,7 @@ public:
 	bool SetPid(int Pid, bool On);
 	bool SetPids(int Pid, const int *Pids1 = NULL, const int *Pids2 = NULL, const int *Pids3 = NULL);
 	bool SetChannel(const cChannel *Channel, eStreamType StreamType, const int* Apid = NULL, const int* Dpid = NULL);
+	void SetPriority(int Priority);
 	
 	virtual int Put(const uchar *Data, int Count);
 	virtual uchar *Get(int &Count);
diff --git a/server/menuHTTP.c b/server/menuHTTP.c
index 47df3a8..1d30aa1 100644
--- a/server/menuHTTP.c
+++ b/server/menuHTTP.c
@@ -2,7 +2,7 @@
 #include "server/menuHTTP.h"
 
 //**************************** cChannelIterator **************
-cChannelIterator::cChannelIterator(cChannel *First): channel(First)
+cChannelIterator::cChannelIterator(const cChannel *First): channel(First)
 {}
 
 const cChannel* cChannelIterator::Next()
@@ -19,7 +19,7 @@ cListAll::cListAll(): cChannelIterator(Channels.First())
 const cChannel* cListAll::NextChannel(const cChannel *Channel)
 {
 	if (Channel)
-		Channel = Channels.Next(Channel);
+		Channel = SkipFakeGroups(Channels.Next(Channel));
 	return Channel;
 }
 
@@ -46,14 +46,19 @@ const cChannel* cListGroups::NextChannel(const cChannel *Channel)
 }
 //
 // ********************* cListGroup ****************
-cListGroup::cListGroup(const cChannel *Group): cChannelIterator((Group && Group->GroupSep() && Channels.Next(Group) && !Channels.Next(Group)->GroupSep()) ? Channels.Next(Group) : NULL)
+cListGroup::cListGroup(const cChannel *Group): cChannelIterator(GetNextChannelInGroup(Group))
 {}
 
+const cChannel* cListGroup::GetNextChannelInGroup(const cChannel *Channel)
+{
+	if (Channel)
+		Channel = SkipFakeGroups(Channels.Next(Channel));
+	return Channel && !Channel->GroupSep() ? Channel : NULL;
+}
+
 const cChannel* cListGroup::NextChannel(const cChannel *Channel)
 {
-	if (Channel)
-		Channel = Channels.Next(Channel);
-	return (Channel && !Channel->GroupSep()) ? Channel : NULL;
+	return GetNextChannelInGroup(Channel);
 }
 //
 // ********************* cListTree ****************
@@ -68,7 +73,7 @@ const cChannel* cListTree::NextChannel(const cChannel *Channel)
 	if (currentGroup == selectedGroup)
 	{
 		if (Channel)
-			Channel = Channels.Next(Channel);
+			Channel = SkipFakeGroups(Channels.Next(Channel));
 		if (Channel && Channel->GroupSep())
 			currentGroup = Channel;
 	}
diff --git a/server/menuHTTP.h b/server/menuHTTP.h
index ecded86..d0f4211 100644
--- a/server/menuHTTP.h
+++ b/server/menuHTTP.h
@@ -13,9 +13,10 @@ class cChannelIterator
 		const cChannel *channel;
 	protected:
 		virtual const cChannel* NextChannel(const cChannel *Channel) = 0;
+		static inline const cChannel* SkipFakeGroups(const cChannel *Channel);
 	public:
 		const cChannel* Next();
-		cChannelIterator(cChannel *First);
+		cChannelIterator(const cChannel *First);
 		virtual ~cChannelIterator() {};
 };
 
@@ -48,6 +49,8 @@ class cListGroups: public cChannelIterator
 
 class cListGroup: public cChannelIterator
 {
+	private:
+		static const cChannel* GetNextChannelInGroup(const cChannel *Channel);
 	protected:
 		virtual const cChannel* NextChannel(const cChannel *Channel);
 	public:
@@ -155,4 +158,11 @@ class cM3uChannelList: public cChannelList
 		virtual ~cM3uChannelList();
 };
 
+inline const cChannel* cChannelIterator::SkipFakeGroups(const cChannel* Group)
+{
+	while (Group && Group->GroupSep() && !*Group->Name())
+		Group = Channels.Next(Group);
+	return Group;
+}
+
 #endif
diff --git a/streamdev-client.c b/streamdev-client.c
index 87afdf3..c720186 100644
--- a/streamdev-client.c
+++ b/streamdev-client.c
@@ -3,7 +3,7 @@
  *
  * See the README file for copyright information and how to reach the author.
  *
- * $Id: streamdev-client.c,v 1.5.2.1 2010/06/08 05:56:14 schmirl Exp $
+ * $Id: streamdev-client.c,v 1.5.2.2 2010/08/18 10:26:18 schmirl Exp $
  */
 
 #include "streamdev-client.h"
@@ -56,4 +56,8 @@ bool cPluginStreamdevClient::SetupParse(const char *Name, const char *Value) {
   return StreamdevClientSetup.SetupParse(Name, Value);
 }
 
+void cPluginStreamdevClient::MainThreadHook(void) {
+  cStreamdevDevice::UpdatePriority();
+}
+
 VDRPLUGINCREATOR(cPluginStreamdevClient); // Don't touch this!
diff --git a/streamdev-client.h b/streamdev-client.h
index a95dbbf..fe1c9fb 100644
--- a/streamdev-client.h
+++ b/streamdev-client.h
@@ -1,5 +1,5 @@
 /*
- *  $Id: streamdev-client.h,v 1.1.1.1.2.1 2010/06/08 05:56:14 schmirl Exp $
+ *  $Id: streamdev-client.h,v 1.1.1.1.2.2 2010/08/18 10:26:18 schmirl Exp $
  */
  
 #ifndef VDR_STREAMDEVCLIENT_H
@@ -23,6 +23,7 @@ public:
   virtual cOsdObject *MainMenuAction(void);
   virtual cMenuSetupPage *SetupMenu(void);
   virtual bool SetupParse(const char *Name, const char *Value);
+  virtual void MainThreadHook(void);
 };
 
 #endif // VDR_STREAMDEVCLIENT_H
diff --git a/streamdev/externremux.sh b/streamdev/externremux.sh
index f64777a..27cca5d 100755
--- a/streamdev/externremux.sh
+++ b/streamdev/externremux.sh
@@ -16,6 +16,8 @@
 # VBR    video bitrate (kbit)
 # VOPTS  custom video options
 # WIDTH  scale video to width
+# HEIGHT scale video to height
+# FPS    output frames per second
 # AC     audio codec
 # ABR    audio bitrate (kbit)
 # AOPTS  custom audio options
@@ -42,14 +44,22 @@ ABR_MONO=64
 ###
 # mencoder binary
 MENCODER=mencoder
+### video part
 # Default video codec (e.g. lavc/x264/copy)
 MENCODER_VC=lavc
+# Default video options if lavc is used (-ovc lavc -lavcopts ...)
+MENCODER_LAVC_VOPTS=vcodec=mpeg4
+# Default video options if x264 is used (-ovc x264 -x264encopts ...)
+MENCODER_X264_VOPTS=threads=auto
+### audio part
 # Default audio codec (e.g. lavc/mp3lame/faac/copy)
 MENCODER_AC=mp3lame
-# Default video codec if lavc is used (-ovc lavc -lavcopts vcodec=)
-MENCODER_LAVC_VC=mpeg4
-# Default audio codec if lavc is used (-oac lavc -lavcopts acodec=)
-MENCODER_LAVC_AC=mp2
+# Default audio options if lavc is used (-oac lavc -lavcopts ...)
+MENCODER_LAVC_AOPTS=acodec=mp2
+# Default audio options if mp3lame is used (-oac mp3lame -lameopts ...)
+MENCODER_LAME_AOPTS=
+# Default audio options if faac is used (-oac faac -faacopts ...)
+MENCODER_FAAC_AOPTS=
 ###
 ### MENCODER CONFIG END
 
@@ -63,6 +73,8 @@ OGG_SPEED=1
 OGG_VQUALITY=0
 # audioquality - higher value gives better quality but is slower (0..10)
 OGG_AQUALITY=0
+# aspect ratio used for scaling if only one of HEIGHT/WIDTH given (16/9 or 4/3)
+OGG_ASPECT='4 / 3'
 ###
 ### OGG CONFIG END
 
@@ -70,7 +82,19 @@ OGG_AQUALITY=0
 
 function hasOpt { echo "$1" | grep -q "\b${2}\b"; }
 
-function isNumeric() { echo "$@" | grep -q '^[0-9]\{1,\}$'; }
+# $1:    concatenation of already set option=value pairs
+# $2-$n: option=value pairs to be echod if the option is not present in $1
+function addOpts
+{
+	local opts="$1"
+	shift
+	while [ $# -gt 0 ]; do
+		hasOpt "$opts" ${1%%=*}= || echo $1
+		shift
+	done
+}
+
+function isNumeric() { echo "$@" | grep -q '^-\?[0-9]\{1,\}$'; }
 
 function remux_cat
 {
@@ -87,20 +111,31 @@ function remux_mencoder
 	# Assemble video options
 	VC=${REMUX_PARAM_VC:-$MENCODER_VC}
 	VOPTS=${REMUX_PARAM_VOPTS}
-	WIDTH=${REMUX_PARAM_WIDTH:-$WIDTH}
+	FPS=${REMUX_PARAM_FPS:-$FPS}
+
+	# if only one of HEIGHT/WIDTH given:
+	# have mencoder calculate other value depending on actual aspect ratio
+	if [ "$HEIGHT" -a -z "$WIDTH" ]; then
+	  WIDTH=-3
+	elif [ "$WIDTH" -a -z "$HEIGHT" ]; then
+	  HEIGHT=-3
+	fi
+
 	case "$VC" in
 		lavc)
 			LAVCOPTS=(
 				${VOPTS}
-				$(hasOpt "$VOPTS" vcodec || echo "vcodec=$MENCODER_LAVC_VC")
+				$(IFS=$IFS:; addOpts "$VOPTS" $MENCODER_LAVC_VOPTS)
 				${VBR:+vbitrate=$VBR}
 			)
 			[ ${#LAVCOPTS[*]} -gt 0 ] && VOPTS=$(IFS=:; echo -lavcopts "${LAVCOPTS[*]}")
 			;; 
 		x264)
+			isNumeric "$HEIGHT" && [ $HEIGHT -lt 0 -a $HEIGHT -gt -8 ] && ((HEIGHT-=8))
+			isNumeric "$WIDTH" && [ $WIDTH -lt 0 -a $WIDTH -gt -8 ] && ((WIDTH-=8))
 			X264OPTS=(
 				${VOPTS}
-				$(hasOpt "$VOPTS" threads || echo "threads=auto")
+				$(IFS=$IFS:; addOpts "$VOPTS" $MENCODER_X264_VOPTS)
 				${VBR:+bitrate=$VBR}
 			)
 			[ ${#X264OPTS[*]} -gt 0 ] && VOPTS=$(IFS=:; echo -x264encopts "${X264OPTS[*]}")
@@ -121,7 +156,7 @@ function remux_mencoder
 			LAVCOPTS=(
 				${LAVCOPTS[*]}
 				${AOPTS}
-				$(hasOpt "$AOPTS" acodec || echo "acodec=$MENCODER_LAVC_AC")
+				$(IFS=$IFS:; addOpts "$AOPTS" $MENCODER_LAVC_AOPTS)
 				${ABR:+abitrate=$ABR}
 			)
 	
@@ -133,6 +168,7 @@ function remux_mencoder
 			LAMEOPTS=(
 				${AOPTS}
 				$(isNumeric "${ABR}" && [ "${ABR}" -lt "$ABR_MONO" ] && ! hasOpt "${AOPTS}" mode ] && echo 'mode=3')
+				$(IFS=$IFS:; addOpts "$AOPTS" $MENCODER_LAME_AOPTS)
 				${ABR:+preset=$ABR}
 			)
 			[ ${#LAMEOPTS[*]} -gt 0 ] && AOPTS=$(IFS=:; echo -lameopts "${LAMEOPTS[*]}")
@@ -140,6 +176,7 @@ function remux_mencoder
 		faac)
 			FAACOPTS=(
 				${AOPTS}
+				$(IFS=$IFS:; addOpts "$AOPTS" $MENCODER_FAAC_AOPTS)
 				${ABR:+br=$ABR}
 			)
 			[ ${#FAACOPTS[*]} -gt 0 ] && AOPTS=$(IFS=:; echo -faacopts "${FAACOPTS[*]}")
@@ -155,15 +192,17 @@ function remux_mencoder
 
 	startReply
 	exec 3<&0
-	echo "$MENCODER" \
+	echo $MENCODER \
 		-ovc $VC $VOPTS \
 		-oac $AC $AOPTS \
-		${WIDTH:+-vf scale -zoom -xy $WIDTH} \
+		${WIDTH:+-vf scale=$WIDTH:$HEIGHT -zoom} \
+		${FPS:+-ofps $FPS} \
 		-o "$FIFO" -- - >&2
-	"$MENCODER" \
+	$MENCODER \
 		-ovc $VC $VOPTS \
 		-oac $AC $AOPTS \
-		${WIDTH:+-vf scale -zoom -xy $WIDTH} \
+		${WIDTH:+-vf scale=$WIDTH:$HEIGHT -zoom} \
+		${FPS:+-ofps $FPS} \
 		-o "$FIFO" -- - 0<&3 >/dev/null &
 }
 
@@ -171,7 +210,15 @@ function remux_ogg
 {
 	VOPTS=${REMUX_PARAM_VOPTS//[:=]/ }
 	AOPTS=${REMUX_PARAM_AOPTS//[:=]/ }
-	WIDTH=${REMUX_PARAM_WIDTH:-$WIDTH}
+
+	# if only one of HEIGHT/WIDTH given:
+	# calculate other value depending on configured aspect ratio
+	# trim to multiple of 8
+	if [ "$HEIGHT" -a -z "$WIDTH" ]; then
+	  WIDTH=$((HEIGHT * $OGG_ASPECT / 8 * 8))
+	elif [ "$WIDTH" -a -z "$HEIGHT" ]; then
+	  HEIGHT=$(($WIDTH * $( echo $OGG_ASPECT | sed 's#^\([0-9]\+\) */ *\([0-9]\+\)$#\2 / \1#') / 8 * 8))
+	fi
 
 	OGGOPTS=(
 		${VOPTS}
@@ -187,14 +234,14 @@ function remux_ogg
 
 	startReply
 	exec 3<&0
-	echo "$OGG" --format ts \
+	echo $OGG --format ts \
 		${OGGOPTS[*]} \
-		${WIDTH:+--width $WIDTH --height $(($WIDTH * 3 / 4 / 8 * 8))} \
+		${WIDTH:+--width $WIDTH --height $HEIGHT} \
                 --title "VDR Streamdev: ${REMUX_CHANNEL_NAME}" \
                 --output "$FIFO" -- - 0<&3 >&2
-	"$OGG" --format ts \
+	$OGG --format ts \
 		${OGGOPTS[*]} \
-		${WIDTH:+--width $WIDTH --height $(($WIDTH * 3 / 4 / 8 * 8))} \
+		${WIDTH:+--width $WIDTH --height $HEIGHT} \
                 --title "VDR Streamdev: ${REMUX_CHANNEL_NAME}" \
                 --output "$FIFO" -- - 0<&3 >/dev/null &
 }
@@ -254,6 +301,7 @@ esac
 ABR=${REMUX_PARAM_ABR:-$ABR}
 VBR=${REMUX_PARAM_VBR:-$VBR}
 WIDTH=${REMUX_PARAM_WIDTH:-$WIDTH}
+HEIGHT=${REMUX_PARAM_HEIGHT:-$HEIGHT}
 PROG=${REMUX_PARAM_PROG:-$PROG}
 
 case "$PROG" in