diff --git a/plugins/decklink/decklink-device-mode.cpp b/plugins/decklink/decklink-device-mode.cpp
index b2f210713..805284e4d 100644
--- a/plugins/decklink/decklink-device-mode.cpp
+++ b/plugins/decklink/decklink-device-mode.cpp
@@ -66,6 +66,24 @@ const std::string &DeckLinkDeviceMode::GetName(void) const
 	return name;
 }
 
+bool DeckLinkDeviceMode::IsEqualFrameRate(int64_t num, int64_t den)
+{
+	if (!mode)
+		return false;
+
+	BMDTimeValue timeValue;
+	BMDTimeScale timeScale;
+	if (mode->GetFrameRate(&timeValue, &timeScale) != S_OK)
+		return false;
+
+	// Calculate greatest common divisor of both values to properly compare framerates
+	int decklinkGcd = std::gcd(timeScale, timeValue);
+	int inputGcd = std::gcd(num, den);
+
+	return ((timeScale / decklinkGcd) == (num / inputGcd) &&
+		(timeValue / decklinkGcd) == (den / inputGcd));
+}
+
 void DeckLinkDeviceMode::SetMode(IDeckLinkDisplayMode *mode_)
 {
 	IDeckLinkDisplayMode *old = mode;
diff --git a/plugins/decklink/decklink-device-mode.hpp b/plugins/decklink/decklink-device-mode.hpp
index 51e1f8bb6..8e796d5d8 100644
--- a/plugins/decklink/decklink-device-mode.hpp
+++ b/plugins/decklink/decklink-device-mode.hpp
@@ -3,6 +3,7 @@
 #include "platform.hpp"
 
 #include <string>
+#include <numeric>
 
 #define MODE_ID_AUTO -1
 
@@ -21,6 +22,7 @@ public:
 	BMDDisplayModeFlags GetDisplayModeFlags(void) const;
 	long long GetId(void) const;
 	const std::string &GetName(void) const;
+	bool IsEqualFrameRate(int64_t num, int64_t den);
 
 	void SetMode(IDeckLinkDisplayMode *mode);
 
diff --git a/plugins/decklink/decklink-output.cpp b/plugins/decklink/decklink-output.cpp
index 46b42da4b..4f3f81dd2 100644
--- a/plugins/decklink/decklink-output.cpp
+++ b/plugins/decklink/decklink-output.cpp
@@ -66,6 +66,18 @@ static bool decklink_output_start(void *data)
 
 	DeckLinkDeviceMode *mode = device->FindOutputMode(decklink->modeID);
 
+	struct obs_video_info ovi;
+	if (!obs_get_video_info(&ovi)) {
+		LOG(LOG_ERROR,
+		    "Start failed: could not retrieve obs_video_info!");
+		return false;
+	}
+
+	if (!mode->IsEqualFrameRate(ovi.fps_num, ovi.fps_den)) {
+		LOG(LOG_ERROR, "Start failed: FPS mismatch!");
+		return false;
+	}
+
 	decklink->SetSize(mode->GetWidth(), mode->GetHeight());
 
 	struct video_scale_info to = {};
@@ -204,10 +216,17 @@ static bool decklink_output_device_changed(obs_properties_t *props,
 		const std::vector<DeckLinkDeviceMode *> &modes =
 			device->GetOutputModes();
 
-		for (DeckLinkDeviceMode *mode : modes) {
-			obs_property_list_add_int(modeList,
-						  mode->GetName().c_str(),
-						  mode->GetId());
+		struct obs_video_info ovi;
+		if (obs_get_video_info(&ovi)) {
+			for (DeckLinkDeviceMode *mode : modes) {
+				if (mode->IsEqualFrameRate(ovi.fps_num,
+							   ovi.fps_den)) {
+					obs_property_list_add_int(
+						modeList,
+						mode->GetName().c_str(),
+						mode->GetId());
+				}
+			}
 		}
 
 		obs_property_list_add_int(keyerList, "Disabled", 0);