UI: Warn if streaming audio/video bitrate is too high

Allows the user to know that the maximum bitrate limit for a streaming
service is being enforced.

obs/data/locale/en-US.ini

@@ -382,6 +382,8 @@ Basic.Settings.Output.Simple.RecordingQuality.Stream="Same as stream"
 Basic.Settings.Output.Simple.RecordingQuality.Small="High Quality, Medium File Size"
 Basic.Settings.Output.Simple.RecordingQuality.HQ="Indistinguishable Quality, Large File Size"
 Basic.Settings.Output.Simple.RecordingQuality.Lossless="Lossless Quality, Tremendously Large File Size"
+Basic.Settings.Output.Simple.Warn.VideoBitrate="Warning: The video bitrate will be set to %1, which is the upper limit for the current streaming service.  If you're sure you want to go above %1, enable advanced encoder options and uncheck \"Enforce streaming service bitrate limits\"."
+Basic.Settings.Output.Simple.Warn.AudioBitrate="Warning: The audio bitrate will be set to %1, which is the upper limit for the current streaming service.  If you're sure you want to go above %1, enable advanced encoder options and uncheck \"Enforce streaming service bitrate limits\"."
 Basic.Settings.Output.Simple.Warn.Encoder="Warning: Recording with a software encoder at a different quality than the stream will require extra CPU usage if you stream and record at the same time."
 Basic.Settings.Output.Simple.Warn.Lossless="Warning: Lossless quality generates tremendously large file sizes!  Lossless quality can use upward of 7 gigabytes of disk space per minute at high resolutions and framerates.  Lossless is not recommended for long recordings unless you have a very large amount of disk space available."
 Basic.Settings.Output.Simple.Warn.Lossless.Msg="Are you sure you want to use lossless quality?"

obs/window-basic-settings.cpp

@@ -472,6 +472,14 @@ OBSBasicSettings::OBSBasicSettings(QWidget *parent)
 			this, SLOT(SimpleRecordingQualityLosslessWarning(int)));
 	connect(ui->simpleOutRecEncoder, SIGNAL(currentIndexChanged(int)),
 			this, SLOT(SimpleRecordingEncoderChanged()));
+	connect(ui->simpleOutputVBitrate, SIGNAL(valueChanged(int)),
+			this, SLOT(SimpleRecordingEncoderChanged()));
+	connect(ui->simpleOutputABitrate, SIGNAL(currentIndexChanged(int)),
+			this, SLOT(SimpleRecordingEncoderChanged()));
+	connect(ui->simpleOutAdvanced, SIGNAL(toggled(bool)),
+			this, SLOT(SimpleRecordingEncoderChanged()));
+	connect(ui->simpleOutEnforce, SIGNAL(toggled(bool)),
+			this, SLOT(SimpleRecordingEncoderChanged()));
 
 	LoadSettings(false);
 
@@ -3053,26 +3061,60 @@ void OBSBasicSettings::SimpleRecordingEncoderChanged()
 {
 	QString qual = ui->simpleOutRecQuality->currentData().toString();
 	QString warning;
+	bool advanced = ui->simpleOutAdvanced->isChecked();
+	bool enforceBitrate = ui->simpleOutEnforce->isChecked() || !advanced;
+	obs_service_t *service = main->GetService();
 
 	delete simpleOutRecWarning;
 
-	if (qual == "Stream") {
-		return;
+	if (enforceBitrate && service) {
+		obs_data_t *videoSettings = obs_data_create();
+		obs_data_t *audioSettings = obs_data_create();
+		int oldVBitrate = ui->simpleOutputVBitrate->value();
+		int oldABitrate = ui->simpleOutputABitrate->currentText().toInt();
+		obs_data_set_int(videoSettings, "bitrate", oldVBitrate);
+		obs_data_set_int(audioSettings, "bitrate", oldABitrate);
+
+		obs_service_apply_encoder_settings(service, videoSettings,
+				audioSettings);
+
+		int newVBitrate = obs_data_get_int(videoSettings, "bitrate");
+		int newABitrate = obs_data_get_int(audioSettings, "bitrate");
+
+		if (newVBitrate < oldVBitrate)
+			warning = SIMPLE_OUTPUT_WARNING("VideoBitrate")
+				.arg(newVBitrate);
+		if (newABitrate < oldABitrate) {
+			if (!warning.isEmpty())
+				warning += "\n\n";
+			warning += SIMPLE_OUTPUT_WARNING("AudioBitrate")
+				.arg(newABitrate);
+		}
 
-	} else if (qual == "Lossless") {
-		warning  = SIMPLE_OUTPUT_WARNING("Lossless");
+		obs_data_release(videoSettings);
+		obs_data_release(audioSettings);
+	}
+
+	if (qual == "Lossless") {
+		if (!warning.isEmpty())
+			warning += "\n\n";
+		warning += SIMPLE_OUTPUT_WARNING("Lossless");
 		warning += "\n\n";
 		warning += SIMPLE_OUTPUT_WARNING("Encoder");
 
-	} else {
+	} else if (qual != "Stream") {
 		QString enc = ui->simpleOutRecEncoder->currentData().toString();
-		if (enc != SIMPLE_ENCODER_X264 &&
-		    enc != SIMPLE_ENCODER_X264_LOWCPU)
-			return;
-
-		warning = SIMPLE_OUTPUT_WARNING("Encoder");
+		if (enc == SIMPLE_ENCODER_X264 ||
+		    enc == SIMPLE_ENCODER_X264_LOWCPU) {
+			if (!warning.isEmpty())
+				warning += "\n\n";
+			warning += SIMPLE_OUTPUT_WARNING("Encoder");
+		}
 	}
 
+	if (warning.isEmpty())
+		return;
+
 	simpleOutRecWarning = new QLabel(warning, this);
 	simpleOutRecWarning->setObjectName("warningLabel");
 	simpleOutRecWarning->setWordWrap(true);