Merge PR #5298: FEAT(server): Add option to disallow recording

This commit adds a new server-configuration that can be used in the
murmur.ini file. It can be used to forbid anyone on the server from
using Mumble's built-in recording functionality.

Any client trying to start a recording nonetheless, will be kicked from
the server.

From Mumble 1.5.0 clients will know about this configuration and will
disable the recording action in the UI, if recording is not allowed on
the server.

Additionally this PR also fixes/revamps two other small issues related
to the recording feature.

57 files changed, 256 insertions, 9 deletions

diff --git a/scripts/murmur.ini b/scripts/murmur.ini
index de224847b..5b65dab9f 100644
--- a/scripts/murmur.ini
+++ b/scripts/murmur.ini
@@ -405,6 +405,14 @@ allowping=true
 ;
 ;logaclchanges=false
 
+; A flag dictating whether clients may use the built-in recording function. Newer
+; clients will respect this option in the UI (e.g. disable the recording feature
+; in the UI). Additionally any client that tries to start a recording is kicked
+; from the server with a corresponding message, if recording is disabled.
+; Default is true. This option was introduced with Murmur 1.5.0.
+;
+; allowRecording=true
+
 ; You can configure any of the configuration options for Ice here. We recommend
 ; leave the defaults as they are.
 ; Please note that this section has to be last in the configuration file.
diff --git a/src/Mumble.proto b/src/Mumble.proto
index e39108ffd..8b84c230f 100644
--- a/src/Mumble.proto
+++ b/src/Mumble.proto
@@ -574,6 +574,8 @@ message ServerConfig {
 	optional uint32 image_message_length = 5;
 	// The maximum number of users allowed on the server.
 	optional uint32 max_users = 6;
+	// Whether using Mumble's recording feature is allowed on the server
+	optional bool recording_allowed = 7;
 }
 
 // Sent by the server to inform the clients of suggested client configuration
diff --git a/src/mumble/Global.cpp b/src/mumble/Global.cpp
index dfbd8ef4f..169b435f9 100644
--- a/src/mumble/Global.cpp
+++ b/src/mumble/Global.cpp
@@ -102,10 +102,11 @@ Global::Global(const QString &qsConfigPath) {
 	bAttenuateOthers              = false;
 	prioritySpeakerActiveOverride = false;
 
-	bAllowHTML      = true;
-	uiMessageLength = 5000;
-	uiImageLength   = 131072;
-	uiMaxUsers      = 0;
+	bAllowHTML       = true;
+	uiMessageLength  = 5000;
+	uiImageLength    = 131072;
+	uiMaxUsers       = 0;
+	recordingAllowed = true;
 
 	qs = nullptr;
 
diff --git a/src/mumble/Global.h b/src/mumble/Global.h
index 773ec62de..c626c7e04 100644
--- a/src/mumble/Global.h
+++ b/src/mumble/Global.h
@@ -106,6 +106,7 @@ public:
 	unsigned int uiMessageLength;
 	unsigned int uiImageLength;
 	unsigned int uiMaxUsers;
+	bool recordingAllowed;
 	bool bQuit;
 	QString windowTitlePostfix;
 	bool bDebugDumpInput;
diff --git a/src/mumble/MainWindow.cpp b/src/mumble/MainWindow.cpp
index cd67814f1..65d1f090c 100644
--- a/src/mumble/MainWindow.cpp
+++ b/src/mumble/MainWindow.cpp
@@ -967,6 +967,16 @@ void MainWindow::toggleSearchDialogVisibility() {
 	m_searchDialog->setVisible(!m_searchDialog->isVisible());
 }
 
+void MainWindow::enableRecording(bool recordingAllowed) {
+	qaRecording->setEnabled(recordingAllowed);
+
+	Global::get().recordingAllowed = recordingAllowed;
+
+	if (!recordingAllowed && voiceRecorderDialog) {
+		voiceRecorderDialog->reject();
+	}
+}
+
 static void recreateServerHandler() {
 	// New server connection, so the sync has not happened yet
 	Global::get().channelListenerManager->setInitialServerSyncDone(false);
@@ -2658,6 +2668,7 @@ void MainWindow::on_qaRecording_triggered() {
 	} else {
 		voiceRecorderDialog = new VoiceRecorderDialog(this);
 		connect(voiceRecorderDialog, SIGNAL(finished(int)), this, SLOT(voiceRecorderDialog_finished(int)));
+		QObject::connect(Global::get().sh.get(), &ServerHandler::disconnected, voiceRecorderDialog, &QDialog::reject);
 		voiceRecorderDialog->show();
 	}
 }
@@ -3209,6 +3220,8 @@ void MainWindow::serverConnected() {
 	Global::get().uiImageLength   = 131072;
 	Global::get().uiMaxUsers      = 0;
 
+	enableRecording(true);
+
 	if (Global::get().s.bMute || Global::get().s.bDeaf) {
 		Global::get().sh->setSelfMuteDeafState(Global::get().s.bMute, Global::get().s.bDeaf);
 	}
@@ -3316,6 +3329,9 @@ void MainWindow::serverDisconnected(QAbstractSocket::SocketError err, QString re
 	qmUser_aboutToShow();
 	on_qmConfig_aboutToShow();
 
+	// We can't record without a server anyway, so we disable the functionality here
+	enableRecording(false);
+
 	if (!Global::get().sh->qlErrors.isEmpty()) {
 		foreach (QSslError e, Global::get().sh->qlErrors)
 			Global::get().l->log(Log::Warning, tr("SSL Verification failed: %1").arg(e.errorString().toHtmlEscaped()));
diff --git a/src/mumble/MainWindow.h b/src/mumble/MainWindow.h
index 443f468fe..733015656 100644
--- a/src/mumble/MainWindow.h
+++ b/src/mumble/MainWindow.h
@@ -339,6 +339,8 @@ public slots:
 	// Callback the search action being triggered
 	void on_qaSearch_triggered();
 	void toggleSearchDialogVisibility();
+	/// Enables or disables the recording feature
+	void enableRecording(bool recordingAllowed);
 signals:
 	/// Signal emitted when the server and the client have finished
 	/// synchronizing (after a new connection).
diff --git a/src/mumble/MainWindow.ui b/src/mumble/MainWindow.ui
index ce58b1a39..72b38b7f5 100644
--- a/src/mumble/MainWindow.ui
+++ b/src/mumble/MainWindow.ui
@@ -916,6 +916,9 @@ the channel's context menu.</string>
    </property>
   </action>
   <action name="qaRecording">
+   <property name="enabled">
+    <bool>false</bool>
+   </property>
    <property name="icon">
     <iconset>
      <normaloff>skin:actions/media-record.svg</normaloff>skin:actions/media-record.svg</iconset>
diff --git a/src/mumble/Messages.cpp b/src/mumble/Messages.cpp
index fe3ca4dd9..4bf8a30a3 100644
--- a/src/mumble/Messages.cpp
+++ b/src/mumble/Messages.cpp
@@ -240,6 +240,9 @@ void MainWindow::msgServerConfig(const MumbleProto::ServerConfig &msg) {
 		Global::get().uiImageLength = msg.image_message_length();
 	if (msg.has_max_users())
 		Global::get().uiMaxUsers = msg.max_users();
+	if (msg.has_recording_allowed()) {
+		Global::get().mw->enableRecording(msg.recording_allowed());
+	}
 }
 
 /// This message is being received when the server denied the permission to perform a requested action. This function
diff --git a/src/mumble/VoiceRecorderDialog.cpp b/src/mumble/VoiceRecorderDialog.cpp
index 0f8c1d8c8..bca3d5ee5 100644
--- a/src/mumble/VoiceRecorderDialog.cpp
+++ b/src/mumble/VoiceRecorderDialog.cpp
@@ -6,6 +6,7 @@
 #include "VoiceRecorderDialog.h"
 
 #include "AudioOutput.h"
+#include "Log.h"
 #include "ServerHandler.h"
 #include "VoiceRecorder.h"
 #include "Global.h"
@@ -159,8 +160,6 @@ void VoiceRecorderDialog::on_qpbStart_clicked() {
 	if (!ao)
 		return;
 
-	Global::get().sh->announceRecordingState(true);
-
 	// Create the recorder
 	VoiceRecorder::Config config;
 	config.sampleRate      = ao->getMixerFreq();
@@ -168,6 +167,19 @@ void VoiceRecorderDialog::on_qpbStart_clicked() {
 	config.mixDownMode     = qrbDownmix->isChecked();
 	config.recordingFormat = static_cast< VoiceRecorderFormat::Format >(ifm);
 
+	if (config.sampleRate == 0) {
+		// If we don't catch this here, Mumble will crash because VoiceRecorder expects the sample rate to be non-zero
+		Global::get().l->log(Log::Warning,
+							 tr("Unable to start recording - the audio output is miconfigured (0Hz sample rate)"));
+
+		// Close this dialog
+		reject();
+
+		return;
+	}
+
+	Global::get().sh->announceRecordingState(true);
+
 	Global::get().sh->recorder.reset(new VoiceRecorder(this, config));
 	VoiceRecorderPtr recorder(Global::get().sh->recorder);
 
diff --git a/src/mumble/mumble_ar.ts b/src/mumble/mumble_ar.ts
index a4b5943f0..bc2eaebd8 100644
--- a/src/mumble/mumble_ar.ts
+++ b/src/mumble/mumble_ar.ts
@@ -8812,6 +8812,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_bg.ts b/src/mumble/mumble_bg.ts
index fd032aefa..baa579864 100644
--- a/src/mumble/mumble_bg.ts
+++ b/src/mumble/mumble_bg.ts
@@ -8805,6 +8805,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_br.ts b/src/mumble/mumble_br.ts
index 8d8942486..15d111cd9 100644
--- a/src/mumble/mumble_br.ts
+++ b/src/mumble/mumble_br.ts
@@ -8804,6 +8804,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_ca.ts b/src/mumble/mumble_ca.ts
index 3fcbf0328..a23feb066 100644
--- a/src/mumble/mumble_ca.ts
+++ b/src/mumble/mumble_ca.ts
@@ -8810,6 +8810,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_cs.ts b/src/mumble/mumble_cs.ts
index 137035598..95761c595 100644
--- a/src/mumble/mumble_cs.ts
+++ b/src/mumble/mumble_cs.ts
@@ -8873,6 +8873,10 @@ Prosím kontaktujte Vašeho administrátora serveru pro další informace.</tran
         <source>Downmix</source>
         <translation>Smíšení Kanálů</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_cy.ts b/src/mumble/mumble_cy.ts
index fb90cb35b..af7a7bc4c 100644
--- a/src/mumble/mumble_cy.ts
+++ b/src/mumble/mumble_cy.ts
@@ -8812,6 +8812,10 @@ Cysylltwch â gweinyddwr y gweinydd ar gyfer gwybodaeth bellach.</translation>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_da.ts b/src/mumble/mumble_da.ts
index 13895093b..6b4b9e4e2 100644
--- a/src/mumble/mumble_da.ts
+++ b/src/mumble/mumble_da.ts
@@ -8867,6 +8867,10 @@ Kontakt venligst din serveradministrator for yderligere information.</translatio
         <source>Downmix</source>
         <translation>Nedmixet</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_de.ts b/src/mumble/mumble_de.ts
index 468cb6d3d..0120b2702 100644
--- a/src/mumble/mumble_de.ts
+++ b/src/mumble/mumble_de.ts
@@ -8965,6 +8965,10 @@ Bitte kontaktieren Sie den Server-Administrator für weitere Informationen.</tra
         <source>Downmix</source>
         <translation>Gemischt</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_el.ts b/src/mumble/mumble_el.ts
index 2a9dfe848..a8a845bf8 100644
--- a/src/mumble/mumble_el.ts
+++ b/src/mumble/mumble_el.ts
@@ -8969,6 +8969,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>Downmix</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_en.ts b/src/mumble/mumble_en.ts
index 9ecd66169..b4cfb59e9 100644
--- a/src/mumble/mumble_en.ts
+++ b/src/mumble/mumble_en.ts
@@ -8802,6 +8802,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_en_GB.ts b/src/mumble/mumble_en_GB.ts
index fd06d2636..323501cee 100644
--- a/src/mumble/mumble_en_GB.ts
+++ b/src/mumble/mumble_en_GB.ts
@@ -8843,6 +8843,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_eo.ts b/src/mumble/mumble_eo.ts
index e322a2484..964e68a11 100644
--- a/src/mumble/mumble_eo.ts
+++ b/src/mumble/mumble_eo.ts
@@ -8815,6 +8815,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_es.ts b/src/mumble/mumble_es.ts
index 875e3462e..d06e3fbd7 100644
--- a/src/mumble/mumble_es.ts
+++ b/src/mumble/mumble_es.ts
@@ -8884,6 +8884,10 @@ Por favor, contacte con el administrador de su servidor para más información.<
         <source>Downmix</source>
         <translation>Mezclar</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_et.ts b/src/mumble/mumble_et.ts
index f40ea519c..c4a9a42f1 100644
--- a/src/mumble/mumble_et.ts
+++ b/src/mumble/mumble_et.ts
@@ -8805,6 +8805,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_eu.ts b/src/mumble/mumble_eu.ts
index 8bb70c645..f329f8b25 100644
--- a/src/mumble/mumble_eu.ts
+++ b/src/mumble/mumble_eu.ts
@@ -8824,6 +8824,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_fa_IR.ts b/src/mumble/mumble_fa_IR.ts
index 68df2d1bd..902e130b5 100644
--- a/src/mumble/mumble_fa_IR.ts
+++ b/src/mumble/mumble_fa_IR.ts
@@ -8802,6 +8802,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_fi.ts b/src/mumble/mumble_fi.ts
index 533a24624..32a502fec 100644
--- a/src/mumble/mumble_fi.ts
+++ b/src/mumble/mumble_fi.ts
@@ -8928,6 +8928,10 @@ Ota yhteyttä palvelintarjoajaan jos haluat lisätietoja.</translation>
         <source>Downmix</source>
         <translation>Alasmiksaus</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_fr.ts b/src/mumble/mumble_fr.ts
index e5a3d7b84..8b0d0a364 100644
--- a/src/mumble/mumble_fr.ts
+++ b/src/mumble/mumble_fr.ts
@@ -8884,6 +8884,10 @@ Contactez l&apos;administrateur de votre serveur pour de plus amples information
         <source>Downmix</source>
         <translation>Downmixage</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_gl.ts b/src/mumble/mumble_gl.ts
index 0df246285..b27fc5ac0 100644
--- a/src/mumble/mumble_gl.ts
+++ b/src/mumble/mumble_gl.ts
@@ -8806,6 +8806,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_he.ts b/src/mumble/mumble_he.ts
index 7a30f1b04..a535e28a1 100644
--- a/src/mumble/mumble_he.ts
+++ b/src/mumble/mumble_he.ts
@@ -8863,6 +8863,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>ערבול</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_hu.ts b/src/mumble/mumble_hu.ts
index 34e096d6f..040c37e1e 100644
--- a/src/mumble/mumble_hu.ts
+++ b/src/mumble/mumble_hu.ts
@@ -8859,6 +8859,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>Lekeverés</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_it.ts b/src/mumble/mumble_it.ts
index c39e5b75b..64d08a2c6 100644
--- a/src/mumble/mumble_it.ts
+++ b/src/mumble/mumble_it.ts
@@ -8968,6 +8968,10 @@ Per favore contatta l&apos;amministratore del server per maggiori informazioni.<
         <source>Downmix</source>
         <translation>Downmix</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_ja.ts b/src/mumble/mumble_ja.ts
index acb248059..290eb540c 100644
--- a/src/mumble/mumble_ja.ts
+++ b/src/mumble/mumble_ja.ts
@@ -8860,6 +8860,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>ダウンミックス</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_ko.ts b/src/mumble/mumble_ko.ts
index 2e18d7e18..a6b1b45fb 100644
--- a/src/mumble/mumble_ko.ts
+++ b/src/mumble/mumble_ko.ts
@@ -8966,6 +8966,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>다운 믹스</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_lt.ts b/src/mumble/mumble_lt.ts
index f635498af..6e2f8f657 100644
--- a/src/mumble/mumble_lt.ts
+++ b/src/mumble/mumble_lt.ts
@@ -8905,6 +8905,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_nl.ts b/src/mumble/mumble_nl.ts
index 916390222..b2185e343 100644
--- a/src/mumble/mumble_nl.ts
+++ b/src/mumble/mumble_nl.ts
@@ -8969,6 +8969,10 @@ Contacteer je serverbeheerder voor meer informatie.</translation>
         <source>Downmix</source>
         <translation>Downmix</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_no.ts b/src/mumble/mumble_no.ts
index a11843a1d..40d185bc9 100644
--- a/src/mumble/mumble_no.ts
+++ b/src/mumble/mumble_no.ts
@@ -8897,6 +8897,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>Nedmikset</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_oc.ts b/src/mumble/mumble_oc.ts
index ab782c7c8..4bb06484e 100644
--- a/src/mumble/mumble_oc.ts
+++ b/src/mumble/mumble_oc.ts
@@ -8805,6 +8805,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_pl.ts b/src/mumble/mumble_pl.ts
index 6ddaa5d5b..4dda5e3fd 100644
--- a/src/mumble/mumble_pl.ts
+++ b/src/mumble/mumble_pl.ts
@@ -8971,6 +8971,10 @@ Skontaktuj się z administratorem serwera po dalsze informacje.</translation>
         <source>Downmix</source>
         <translation>Scalaj ścieżki</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_pt_BR.ts b/src/mumble/mumble_pt_BR.ts
index edc221d7e..edce41fbf 100644
--- a/src/mumble/mumble_pt_BR.ts
+++ b/src/mumble/mumble_pt_BR.ts
@@ -8886,6 +8886,10 @@ Por favor contate seu administrador de servidor para mais informações.</transl
         <source>Downmix</source>
         <translation>Remixagem</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_pt_PT.ts b/src/mumble/mumble_pt_PT.ts
index 2b196df2f..26986c681 100644
--- a/src/mumble/mumble_pt_PT.ts
+++ b/src/mumble/mumble_pt_PT.ts
@@ -8886,6 +8886,10 @@ Por favor contate seu administrador de servidor para mais informações.</transl
         <source>Downmix</source>
         <translation>Remistura</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_ro.ts b/src/mumble/mumble_ro.ts
index 06f23905e..2f0beadd0 100644
--- a/src/mumble/mumble_ro.ts
+++ b/src/mumble/mumble_ro.ts
@@ -8810,6 +8810,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_ru.ts b/src/mumble/mumble_ru.ts
index ea82a20ee..5749ae9b6 100644
--- a/src/mumble/mumble_ru.ts
+++ b/src/mumble/mumble_ru.ts
@@ -8921,6 +8921,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>Микшированный</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_si.ts b/src/mumble/mumble_si.ts
index f593532b0..469c8fcbb 100644
--- a/src/mumble/mumble_si.ts
+++ b/src/mumble/mumble_si.ts
@@ -8759,6 +8759,10 @@ Please contact your server administrator for further information.</source>
         <source>Select target directory</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_sq.ts b/src/mumble/mumble_sq.ts
index 09823516b..dc697ee01 100644
--- a/src/mumble/mumble_sq.ts
+++ b/src/mumble/mumble_sq.ts
@@ -8759,6 +8759,10 @@ Please contact your server administrator for further information.</source>
         <source>Select target directory</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_sv.ts b/src/mumble/mumble_sv.ts
index 59ffd324c..d4b03d3b6 100644
--- a/src/mumble/mumble_sv.ts
+++ b/src/mumble/mumble_sv.ts
@@ -8909,6 +8909,10 @@ Kontakta din serveradministratör för mer information.</translation>
         <source>Downmix</source>
         <translation>Nedmixning</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_te.ts b/src/mumble/mumble_te.ts
index 6a6da04f5..e25423e99 100644
--- a/src/mumble/mumble_te.ts
+++ b/src/mumble/mumble_te.ts
@@ -8822,6 +8822,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_th.ts b/src/mumble/mumble_th.ts
index 672dc8fb7..b6bc425c0 100644
--- a/src/mumble/mumble_th.ts
+++ b/src/mumble/mumble_th.ts
@@ -8802,6 +8802,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_tr.ts b/src/mumble/mumble_tr.ts
index cb7bed3a4..066df82a4 100644
--- a/src/mumble/mumble_tr.ts
+++ b/src/mumble/mumble_tr.ts
@@ -8967,6 +8967,10 @@ Daha fazla bilgi için sunucu yöneticisi ile irtibata geçiniz.</translation>
         <source>Downmix</source>
         <translation>Kanalları azalt</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_uk.ts b/src/mumble/mumble_uk.ts
index 870bf97be..9e01ff286 100644
--- a/src/mumble/mumble_uk.ts
+++ b/src/mumble/mumble_uk.ts
@@ -8806,6 +8806,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_zh_CN.ts b/src/mumble/mumble_zh_CN.ts
index c52d3ce36..71378a4e0 100644
--- a/src/mumble/mumble_zh_CN.ts
+++ b/src/mumble/mumble_zh_CN.ts
@@ -8958,6 +8958,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>缩混</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_zh_HK.ts b/src/mumble/mumble_zh_HK.ts
index 4f5a8ed84..002c2409a 100644
--- a/src/mumble/mumble_zh_HK.ts
+++ b/src/mumble/mumble_zh_HK.ts
@@ -8814,6 +8814,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>降混</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/mumble/mumble_zh_TW.ts b/src/mumble/mumble_zh_TW.ts
index 97b3ff342..b77a02c8f 100644
--- a/src/mumble/mumble_zh_TW.ts
+++ b/src/mumble/mumble_zh_TW.ts
@@ -8834,6 +8834,10 @@ Please contact your server administrator for further information.</source>
         <source>Downmix</source>
         <translation>立體聲轉單聲道</translation>
     </message>
+    <message>
+        <source>Unable to start recording - the audio output is miconfigured (0Hz sample rate)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>WASAPIInput</name>
diff --git a/src/murmur/Messages.cpp b/src/murmur/Messages.cpp
index ca47f52a2..b4bb04338 100644
--- a/src/murmur/Messages.cpp
+++ b/src/murmur/Messages.cpp
@@ -505,6 +505,7 @@ void Server::msgAuthenticate(ServerUser *uSource, MumbleProto::Authenticate &msg
 	mpsc.set_message_length(iMaxTextMessageLength);
 	mpsc.set_image_message_length(iMaxImageMessageLength);
 	mpsc.set_max_users(iMaxUsers);
+	mpsc.set_recording_allowed(allowRecording);
 	sendMessage(uSource, mpsc);
 
 	MumbleProto::SuggestConfig mpsug;
@@ -914,10 +915,25 @@ void Server::msgUserState(ServerUser *uSource, MumbleProto::UserState &msg) {
 
 		MumbleProto::TextMessage mptm;
 		mptm.add_tree_id(0);
-		if (pDstServerUser->bRecording)
-			mptm.set_message(u8(QString(QLatin1String("User '%1' started recording")).arg(pDstServerUser->qsName)));
-		else
+		if (pDstServerUser->bRecording) {
+			if (!allowRecording) {
+				// User tried to start recording even though this server forbids it
+				// -> Kick user
+				MumbleProto::UserRemove mpur;
+				mpur.set_session(uSource->uiSession);
+				mpur.set_reason("Recording is not allowed on this server");
+				sendMessage(uSource, mpur);
+				uSource->forceFlush();
+				uSource->disconnectSocket(true);
+
+				// We just kicked this user, so there is no point in further processing his/her message
+				return;
+			} else {
+				mptm.set_message(u8(QString(QLatin1String("User '%1' started recording")).arg(pDstServerUser->qsName)));
+			}
+		} else {
 			mptm.set_message(u8(QString(QLatin1String("User '%1' stopped recording")).arg(pDstServerUser->qsName)));
+		}
 
 		sendAll(mptm, ~0x010203);
 
diff --git a/src/murmur/Meta.cpp b/src/murmur/Meta.cpp
index 6ed11cdb1..22eab3733 100644
--- a/src/murmur/Meta.cpp
+++ b/src/murmur/Meta.cpp
@@ -111,6 +111,8 @@ MetaParams::MetaParams() {
 	bLogGroupChanges = false;
 	bLogACLChanges   = false;
 
+	allowRecording = true;
+
 	qsSettings = nullptr;
 }
 
@@ -320,6 +322,8 @@ void MetaParams::read(QString fname) {
 	bLogGroupChanges = typeCheckedFromSettings("loggroupchanges", bLogGroupChanges);
 	bLogACLChanges   = typeCheckedFromSettings("logaclchanges", bLogACLChanges);
 
+	allowRecording = typeCheckedFromSettings("allowRecording", allowRecording);
+
 	iOpusThreshold = typeCheckedFromSettings("opusthreshold", iOpusThreshold);
 
 	iChannelNestingLimit = typeCheckedFromSettings("channelnestinglimit", iChannelNestingLimit);
diff --git a/src/murmur/Meta.h b/src/murmur/Meta.h
index 91b48f535..db36a8d70 100644
--- a/src/murmur/Meta.h
+++ b/src/murmur/Meta.h
@@ -150,6 +150,9 @@ public:
 	/// A flag indicating whether changes in ACLs should be logged
 	bool bLogACLChanges;
 
+	/// A flag indicating whether recording is allowed on this server
+	bool allowRecording;
+
 	/// qsAbsSettingsFilePath is the absolute path to
 	/// the murmur.ini used by this Meta instance.
 	QString qsAbsSettingsFilePath;
diff --git a/src/murmur/Server.cpp b/src/murmur/Server.cpp
index 28f7cf1f7..7f3751c63 100644
--- a/src/murmur/Server.cpp
+++ b/src/murmur/Server.cpp
@@ -373,6 +373,7 @@ void Server::readParams() {
 	qurlRegWeb             = Meta::mp.qurlRegWeb;
 	bBonjour               = Meta::mp.bBonjour;
 	bAllowPing             = Meta::mp.bAllowPing;
+	allowRecording         = Meta::mp.allowRecording;
 	bCertRequired          = Meta::mp.bCertRequired;
 	bForceExternalAuth     = Meta::mp.bForceExternalAuth;
 	qrUserName             = Meta::mp.qrUserName;
@@ -603,6 +604,8 @@ void Server::setLiveConf(const QString &key, const QString &value) {
 #endif
 	} else if (key == "allowping")
 		bAllowPing = !v.isNull() ? QVariant(v).toBool() : Meta::mp.bAllowPing;
+	else if (key == "allowrecording")
+		allowRecording = !v.isNull() ? QVariant(v).toBool() : Meta::mp.allowRecording;
 	else if (key == "username")
 		qrUserName = !v.isNull() ? QRegExp(v) : Meta::mp.qrUserName;
 	else if (key == "channelname")
diff --git a/src/murmur/Server.h b/src/murmur/Server.h
index ee927adc4..2cb057cbb 100644
--- a/src/murmur/Server.h
+++ b/src/murmur/Server.h
@@ -131,6 +131,7 @@ public:
 	QUrl qurlRegWeb;
 	bool bBonjour;
 	bool bAllowPing;
+	bool allowRecording;
 
 	QRegExp qrUserName;
 	QRegExp qrChannelName;