frontend: Support preferred video format/space/range in GoLiveApi

Also sets Rec. 709/limited defaults for multitrack output.

frontend/utility/MultitrackVideoOutput.cpp

@@ -158,9 +158,6 @@ static void adjust_video_encoder_scaling(const obs_video_info &ovi, obs_encoder_
 	auto requested_width = encoder_config.width;
 	auto requested_height = encoder_config.height;
 
-	if (ovi.output_width == requested_width || ovi.output_height == requested_height)
-		return;
-
 	if (ovi.base_width < requested_width || ovi.base_height < requested_height) {
 		blog(LOG_WARNING,
 		     "Requested resolution exceeds canvas/available resolution for encoder %zu: %" PRIu32 "x%" PRIu32
@@ -170,7 +167,9 @@ static void adjust_video_encoder_scaling(const obs_video_info &ovi, obs_encoder_
 
 	obs_encoder_set_scaled_size(video_encoder, requested_width, requested_height);
 	obs_encoder_set_gpu_scale_type(video_encoder, encoder_config.gpu_scale_type.value_or(OBS_SCALE_BICUBIC));
-	obs_encoder_set_preferred_video_format(video_encoder, VIDEO_FORMAT_NV12);
+	obs_encoder_set_preferred_video_format(video_encoder, encoder_config.format.value_or(VIDEO_FORMAT_NV12));
+	obs_encoder_set_preferred_color_space(video_encoder, encoder_config.colorspace.value_or(VIDEO_CS_709));
+	obs_encoder_set_preferred_range(video_encoder, encoder_config.range.value_or(VIDEO_RANGE_PARTIAL));
 }
 
 static uint32_t closest_divisor(const obs_video_info &ovi, const media_frames_per_second &target_fps)

frontend/utility/models/multitrack-video.hpp

@@ -56,6 +56,34 @@ NLOHMANN_JSON_SERIALIZE_ENUM(obs_scale_type, {
 						     {OBS_SCALE_AREA, "OBS_SCALE_AREA"},
 					     })
 
+NLOHMANN_JSON_SERIALIZE_ENUM(video_colorspace, {
+						       {VIDEO_CS_DEFAULT, "VIDEO_CS_DEFAULT"},
+						       {VIDEO_CS_601, "VIDEO_CS_601"},
+						       {VIDEO_CS_709, "VIDEO_CS_709"},
+						       {VIDEO_CS_SRGB, "VIDEO_CS_SRGB"},
+						       {VIDEO_CS_2100_PQ, "VIDEO_CS_2100_PQ"},
+						       {VIDEO_CS_2100_HLG, "VIDEO_CS_2100_HLG"},
+					       })
+
+/* This only includes output formats selectable in advanced settings. */
+NLOHMANN_JSON_SERIALIZE_ENUM(video_format, {
+						   {VIDEO_FORMAT_NONE, "VIDEO_FORMAT_NONE"},
+						   {VIDEO_FORMAT_I420, "VIDEO_FORMAT_I420"},
+						   {VIDEO_FORMAT_NV12, "VIDEO_FORMAT_NV12"},
+						   {VIDEO_FORMAT_BGRA, "VIDEO_FORMAT_BGRA"},
+						   {VIDEO_FORMAT_I444, "VIDEO_FORMAT_I444"},
+						   {VIDEO_FORMAT_I010, "VIDEO_FORMAT_I010"},
+						   {VIDEO_FORMAT_P010, "VIDEO_FORMAT_P010"},
+						   {VIDEO_FORMAT_P216, "VIDEO_FORMAT_P216"},
+						   {VIDEO_FORMAT_P416, "VIDEO_FORMAT_P416"},
+					   })
+
+NLOHMANN_JSON_SERIALIZE_ENUM(video_range_type, {
+						       {VIDEO_RANGE_DEFAULT, "VIDEO_RANGE_DEFAULT"},
+						       {VIDEO_RANGE_PARTIAL, "VIDEO_RANGE_PARTIAL"},
+						       {VIDEO_RANGE_FULL, "VIDEO_RANGE_FULL"},
+					       })
+
 NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(media_frames_per_second, numerator, denominator)
 
 namespace GoLiveApi {
@@ -212,10 +240,13 @@ struct VideoEncoderConfiguration {
 	uint32_t height;
 	optional<media_frames_per_second> framerate;
 	optional<obs_scale_type> gpu_scale_type;
+	optional<video_colorspace> colorspace;
+	optional<video_range_type> range;
+	optional<video_format> format;
 	json settings;
 
 	NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT(VideoEncoderConfiguration, type, width, height, framerate,
-						    gpu_scale_type, settings)
+						    gpu_scale_type, colorspace, range, format, settings)
 };
 
 struct AudioEncoderConfiguration {