Reorder arguments in setVideoOptions overload

- The new ordering (with the frame rate AFTER width and height) doesn't
  match the other signature, but it *is* consistent with the Timeline
  constructor, and it just feels more natural
- Added overloaded-function notes to doxygen strings in FFmpegWriter.h
- Also added a warning about the argument order mismatch above

include/FFmpegWriter.h

@@ -285,6 +285,8 @@ namespace openshot {
 		/// @param channels The number of audio channels needed in this file
 		/// @param channel_layout The 'layout' of audio channels (i.e. mono, stereo, surround, etc...)
 		/// @param bit_rate The audio bit rate used during encoding
+		///
+		/// \note This is an overloaded function.
 		void SetAudioOptions(bool has_audio, std::string codec, int sample_rate, int channels, openshot::ChannelLayout channel_layout, int bit_rate);
 
 		/// @brief Set audio export options.
@@ -294,6 +296,8 @@ namespace openshot {
 		/// @param codec The codec used to encode the audio for this file
 		/// @param sample_rate The number of audio samples needed in this file
 		/// @param bit_rate The audio bit rate used during encoding
+		///
+		/// \note This is an overloaded function.
 		void SetAudioOptions(std::string codec, int sample_rate, int bit_rate);
 
 		/// @brief Set the cache size
@@ -310,18 +314,23 @@ namespace openshot {
 		/// @param interlaced Does this video need to be interlaced?
 		/// @param top_field_first Which frame should be used as the top field?
 		/// @param bit_rate The video bit rate used during encoding
+		///
+		/// \note This is an overloaded function.
 		void SetVideoOptions(bool has_video, std::string codec, openshot::Fraction fps, int width, int height, openshot::Fraction pixel_ratio, bool interlaced, bool top_field_first, int bit_rate);
 
 		/// @brief Set video export options.
 		///
 		/// Enables the stream and configures non-interlaced video with a 1:1 pixel aspect ratio.
 		///
 		/// @param codec The codec used to encode the images in this video
-		/// @param fps The number of frames per second
 		/// @param width The width in pixels of this video
 		/// @param height The height in pixels of this video
+		/// @param fps The number of frames per second
 		/// @param bit_rate The video bit rate used during encoding
-		void SetVideoOptions(std::string codec, openshot::Fraction fps, int width, int height, int bit_rate);
+		///
+		/// \note This is an overloaded function.
+		/// \warning Observe the argument order, which is consistent with the openshot::Timeline constructor, but differs from the other signature.
+		void SetVideoOptions(std::string codec, int width, int height,  openshot::Fraction fps, int bit_rate);
 
 		/// @brief Set custom options (some codecs accept additional params). This must be called after the
 		/// PrepareStreams() method, otherwise the streams have not been initialized yet.
@@ -337,12 +346,16 @@ namespace openshot {
 
 		/// @brief Add a frame to the stack waiting to be encoded.
 		/// @param frame The openshot::Frame object to write to this image
+		///
+		/// \note This is an overloaded function.
 		void WriteFrame(std::shared_ptr<openshot::Frame> frame);
 
 		/// @brief Write a block of frames from a reader
 		/// @param reader A openshot::ReaderBase object which will provide frames to be written
 		/// @param start The starting frame number of the reader
 		/// @param length The number of frames to write
+		///
+		/// \note This is an overloaded function.
 		void WriteFrame(openshot::ReaderBase *reader, int64_t start, int64_t length);
 
 		/// @brief Write the file trailer (after all frames are written). This is called automatically

src/FFmpegWriter.cpp

@@ -278,7 +278,7 @@ void FFmpegWriter::SetVideoOptions(bool has_video, std::string codec, Fraction f
 }
 
 // Set video export options (overloaded function)
-void FFmpegWriter::SetVideoOptions(std::string codec, Fraction fps, int width, int height, int bit_rate) {
+void FFmpegWriter::SetVideoOptions(std::string codec, int width, int height,  Fraction fps, int bit_rate) {
 	// Call full signature with some default parameters
 	FFmpegWriter::SetVideoOptions(true, codec, fps, width, height,
 	                              openshot::Fraction(1, 1), false, true, bit_rate);
@@ -324,7 +324,8 @@ void FFmpegWriter::SetAudioOptions(bool has_audio, std::string codec, int sample
 // Set audio export options (overloaded function)
 void FFmpegWriter::SetAudioOptions(std::string codec, int sample_rate, int bit_rate) {
 	// Call full signature with some default parameters
-	FFmpegWriter::SetAudioOptions(true, codec, sample_rate, 2, openshot::LAYOUT_STEREO, bit_rate);
+	FFmpegWriter::SetAudioOptions(true, codec, sample_rate, 2,
+	                              openshot::LAYOUT_STEREO, bit_rate);
 }
 
 

tests/FFmpegWriter_Tests.cpp

@@ -97,7 +97,7 @@ TEST(Options_Overloads)
 
 	// Set options
 	w.SetAudioOptions("aac", 48000, 192000);
-	w.SetVideoOptions("libx264", Fraction(30,1), 1280, 720, 5000000);
+	w.SetVideoOptions("libx264", 1280, 720, Fraction(30,1), 5000000);
 
 	// Open writer
 	w.Open();