diff --git a/src/libcamera/pipeline/simple/converter.cpp b/src/libcamera/pipeline/simple/converter.cpp
index 87d15c781ed8..8f54caaca983 100644
--- a/src/libcamera/pipeline/simple/converter.cpp
+++ b/src/libcamera/pipeline/simple/converter.cpp
@@ -133,6 +133,21 @@ SizeRange SimpleConverter::sizes(const Size &input)
 	return sizes;
 }
 
+std::tuple<unsigned int, unsigned int>
+SimpleConverter::strideAndFrameSize(const PixelFormat &pixelFormat,
+				    const Size &size)
+{
+	V4L2DeviceFormat format;
+	format.fourcc = m2m_->capture()->toV4L2PixelFormat(pixelFormat);
+	format.size = size;
+
+	int ret = m2m_->capture()->tryFormat(&format);
+	if (ret < 0)
+		return std::make_tuple(0, 0);
+
+	return std::make_tuple(format.planes[0].bpl, format.planes[0].size);
+}
+
 int SimpleConverter::configure(PixelFormat inputFormat, const Size &inputSize,
 			       const StreamConfiguration &outputCfg)
 {
@@ -254,19 +269,4 @@ void SimpleConverter::outputBufferReady(FrameBuffer *buffer)
 	}
 }
 
-std::tuple<unsigned int, unsigned int>
-SimpleConverter::strideAndFrameSize(const Size &size,
-				    const PixelFormat &pixelFormat)
-{
-	V4L2DeviceFormat format;
-	format.fourcc = m2m_->capture()->toV4L2PixelFormat(pixelFormat);
-	format.size = size;
-
-	int ret = m2m_->capture()->tryFormat(&format);
-	if (ret < 0)
-		return std::make_tuple(0, 0);
-
-	return std::make_tuple(format.planes[0].bpl, format.planes[0].size);
-}
-
 } /* namespace libcamera */
diff --git a/src/libcamera/pipeline/simple/converter.h b/src/libcamera/pipeline/simple/converter.h
index 06d66f8caba7..07a632abd8f6 100644
--- a/src/libcamera/pipeline/simple/converter.h
+++ b/src/libcamera/pipeline/simple/converter.h
@@ -35,6 +35,8 @@ public:
 
 	std::vector<PixelFormat> formats(PixelFormat input);
 	SizeRange sizes(const Size &input);
+	std::tuple<unsigned int, unsigned int>
+	strideAndFrameSize(const PixelFormat &pixelFormat, const Size &size);
 
 	int configure(PixelFormat inputFormat, const Size &inputSize,
 		      const StreamConfiguration &outputCfg);
@@ -46,9 +48,6 @@ public:
 
 	int queueBuffers(FrameBuffer *input, FrameBuffer *output);
 
-	std::tuple<unsigned int, unsigned int>
-	strideAndFrameSize(const Size &size, const PixelFormat &pixelFormat);
-
 	Signal<FrameBuffer *, FrameBuffer *> bufferReady;
 
 private:
diff --git a/src/libcamera/pipeline/simple/simple.cpp b/src/libcamera/pipeline/simple/simple.cpp
index a97b8442d9a4..4e3127814b89 100644
--- a/src/libcamera/pipeline/simple/simple.cpp
+++ b/src/libcamera/pipeline/simple/simple.cpp
@@ -494,7 +494,7 @@ CameraConfiguration::Status SimpleCameraConfiguration::validate()
 	SimpleConverter *converter = pipe->converter();
 
 	std::tie(cfg.stride, cfg.frameSize) =
-		converter->strideAndFrameSize(cfg.size, cfg.pixelFormat);
+		converter->strideAndFrameSize(cfg.pixelFormat, cfg.size);
 	if (cfg.stride == 0)
 		return Invalid;