project: Version 0.3.0

* Updated the libOBS dependency to 24.0.0. You will need to use OBS Studio 24.0.0 or newer in order to run the plugin.
* Implemented full hardware encoding for all GPU capable encoders (NVENC H264, NVENC H265). This should be perform identical to the OBS included full hardware encoders.
* Reduced the latency for some encoders to be as low as 1 frame, if settings allow. For NVENC, latency is tied to (B-Frames + 1) and Lookahead Frames, whichever is bigger.
* Further improved performance by throwing even less memory away every frame. Almost all memory is now re-used if possible and only released when the encoding is stopped by any means.
* Apple ProRes encoded files should now be remuxable when stored in Matroska (MKV) and survive at least one remuxing. This bug was already fixed in current master FFmpeg, and thanks for discovering this bug go to FRANKIEonPC.
* All color metadata is now set for encoders that support this, such as NVENC. Video players and editors that support this kind of metadata should see an improvement in color quality, especially with 10-bit or higher output.
* Framerate is now set to be fixed, further improving compatibility with players. It was previously left to be guessed by the video player through the timing information.
* Settings are now output to the log file for easier debugging. Please remember to send a log file with any issue you have with the plugin.

CMakeLists.txt

@@ -25,7 +25,7 @@ Include("cmake/util.cmake")
 
 # Automatic Versioning
 set(VERSION_MAJOR 0)
-set(VERSION_MINOR 2)
+set(VERSION_MINOR 3)
 set(VERSION_PATCH 0)
 set(VERSION_TWEAK 0)
 set(PROJECT_COMMIT "N/A")
@@ -325,6 +325,7 @@ add_library(${PROJECT_NAME} MODULE
 	${PROJECT_GENERATED}
 	${PROJECT_PRIVATE}
 	${PROJECT_DATA}
+	${PROJECT_TEMPLATES}
 )
 
 # Include Directories

source/encoder.cpp

@@ -600,8 +600,7 @@ void obsffmpeg::encoder::initialize_sw(obs_data_t* settings)
 		    static_cast<AVPixelFormat>(obs_data_get_int(settings, ST_FFMPEG_COLORFORMAT));
 		if (_pixfmt_target == AV_PIX_FMT_NONE) {
 			// Find the best conversion format.
-			std::vector<AVPixelFormat> fmts = ffmpeg::tools::get_software_formats(_codec->pix_fmts);
-			_pixfmt_target = ffmpeg::tools::get_best_compatible_format(fmts.data(), _pixfmt_source);
+			_pixfmt_target = ffmpeg::tools::get_least_lossy_format(_codec->pix_fmts, _pixfmt_source);
 
 			if (_handler) // Allow Handler to override the automatic color format for sanity reasons.
 				_handler->override_colorformat(_pixfmt_target, settings, _codec, _context);

source/ffmpeg/tools.cpp

@@ -279,106 +279,6 @@ std::vector<AVPixelFormat> ffmpeg::tools::get_software_formats(const AVPixelForm
 	return std::move(fmts);
 }
 
-static std::map<std::pair<AVPixelFormat, AVPixelFormat>, double_t> format_compatibility = {
-    {{AV_PIX_FMT_NV12, AV_PIX_FMT_NV12}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_NV12, AV_PIX_FMT_NV21}, 65535.0},
-
-    {{AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P}, 65535.0},
-    {{AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P9}, 58981.5},
-    {{AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10}, 53083.35},
-    {{AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P12}, 47775.015},
-    {{AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P14}, 42997.5135},
-    {{AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16}, 38697.76215},
-
-    {{AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA420P}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA420P9}, 65535.0},
-    {{AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA420P10}, 58981.5},
-    {{AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA420P16}, 53083.35},
-    {{AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P}, 32767.0},
-
-    {{AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P}, 65535.0},
-    {{AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P9}, 58981.5},
-    {{AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P10}, 53083.35},
-    {{AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P12}, 47775.015},
-    {{AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P14}, 42997.5135},
-    {{AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P16}, 38697.76215},
-
-    {{AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA422P}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P9}, 65535.0},
-    {{AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P10}, 58981.5},
-    {{AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P16}, 53083.35},
-    {{AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P}, 32767.0},
-
-    {{AV_PIX_FMT_YVYU422, AV_PIX_FMT_YVYU422}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_YVYU422, AV_PIX_FMT_YUYV422}, 65535.0},
-
-    {{AV_PIX_FMT_UYVY422, AV_PIX_FMT_UYVY422}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_UYVY422, AV_PIX_FMT_YVYU422}, 65535.0},
-
-    {{AV_PIX_FMT_YUYV422, AV_PIX_FMT_YUYV422}, std::numeric_limits<double_t>::max()},
-
-    {{AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P}, 65535.0},
-    {{AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P9}, 58981.5},
-    {{AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P10}, 53083.35},
-    {{AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P12}, 47775.015},
-    {{AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P14}, 42997.5135},
-    {{AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P16}, 38697.76215},
-
-    {{AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P9}, 65535.0},
-    {{AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P10}, 58981.5},
-    {{AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P16}, 53083.35},
-    {{AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P}, 32767.0},
-
-    {{AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBA}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB0}, 65535.0},
-    {{AV_PIX_FMT_RGBA, AV_PIX_FMT_0RGB}, 32767.0},
-    {{AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB24}, 16384.0},
-
-    {{AV_PIX_FMT_BGRA, AV_PIX_FMT_BGRA}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR0}, 65535.0},
-    {{AV_PIX_FMT_BGRA, AV_PIX_FMT_0BGR}, 32767.0},
-    {{AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR24}, 16384.0},
-
-    {{AV_PIX_FMT_BGR0, AV_PIX_FMT_BGR0}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_BGR0, AV_PIX_FMT_BGRA}, 65535.0},
-    {{AV_PIX_FMT_BGR0, AV_PIX_FMT_BGR24}, 32767.0},
-
-    {{AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9}, 65535.0},
-    {{AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY10}, 58981.5},
-    {{AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY12}, 53083.35},
-    {{AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY14}, 47775.015},
-    {{AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16}, 42997.5135},
-
-    {{AV_PIX_FMT_BGR24, AV_PIX_FMT_BGR24}, std::numeric_limits<double_t>::max()},
-    {{AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB24}, 32767.0},
-};
-
-AVPixelFormat ffmpeg::tools::get_best_compatible_format(const AVPixelFormat* list, AVPixelFormat source)
-{
-	double_t      score = std::numeric_limits<double_t>::min();
-	AVPixelFormat best  = source;
-
-	for (auto fmt = list; fmt && (*fmt != AV_PIX_FMT_NONE); fmt++) {
-		auto found = format_compatibility.find(std::pair{source, *fmt});
-		if (found != format_compatibility.end() && (score < found->second)) {
-			score = found->second;
-			best  = *fmt;
-		}
-	}
-
-	if (score <= 0) {
-		int data_loss = 0;
-		return avcodec_find_best_pix_fmt_of_list(list, source, 0, &data_loss);
-	}
-
-	return best;
-}
-
 void ffmpeg::tools::setup_obs_color(video_colorspace colorspace, video_range_type range, AVCodecContext* context)
 {
 	std::map<video_colorspace, std::tuple<AVColorSpace, AVColorPrimaries, AVColorTransferCharacteristic>>

source/ffmpeg/tools.hpp

@@ -56,8 +56,6 @@ namespace ffmpeg {
 
 		std::vector<AVPixelFormat> get_software_formats(const AVPixelFormat* list);
 
-		AVPixelFormat get_best_compatible_format(const AVPixelFormat* list, AVPixelFormat source);
-
 		void setup_obs_color(video_colorspace colorspace, video_range_type range, AVCodecContext* context);
 	} // namespace tools
 } // namespace ffmpeg

source/ui/nvenc_shared.cpp

@@ -20,6 +20,7 @@
 // SOFTWARE.
 
 #include "nvenc_shared.hpp"
+#include <algorithm>
 #include "codecs/hevc.hpp"
 #include "plugin.hpp"
 #include "strings.hpp"
@@ -131,15 +132,17 @@ std::map<b_ref_mode, std::string> obsffmpeg::nvenc::b_ref_mode_to_opt{
     {b_ref_mode::MIDDLE, "middle"},
 };
 
-void obsffmpeg::nvenc::override_lag_in_frames(size_t& lag, obs_data_t*, const AVCodec*,
-                                              AVCodecContext* context)
+void obsffmpeg::nvenc::override_lag_in_frames(size_t& lag, obs_data_t*, const AVCodec*, AVCodecContext* context)
 {
 	// With NVENC, the number of frames lagged before we get our first
 	// packet is determined by the number of b-frames. Threads, lookahead
 	// frames and various other settings are ignored.
 	// The minimum number of lagged frames is 1.
 
-	lag = 1ull + static_cast<size_t>(context->max_b_frames);
+	int64_t rcla = 0;
+	av_opt_get_int(context, "rc-lookahead", AV_OPT_SEARCH_CHILDREN, &rcla);
+
+	lag = static_cast<size_t>(std::max(1ll + static_cast<int64_t>(context->max_b_frames), rcla));
 }
 
 void obsffmpeg::nvenc::get_defaults(obs_data_t* settings, const AVCodec*, AVCodecContext*)