UI: Add Hybrid MP4 to format selection

UI/data/locale/en-US.ini

@@ -966,6 +966,7 @@ Basic.Settings.Output.Format.MP4="MPEG-4 (.mp4)"
 Basic.Settings.Output.Format.MOV="QuickTime (.mov)"
 Basic.Settings.Output.Format.TS="MPEG-TS (.ts)"
 Basic.Settings.Output.Format.HLS="HLS (.m3u8 + .ts)"
+Basic.Settings.Output.Format.hMP4="Hybrid MP4 [BETA] (.mp4)"
 Basic.Settings.Output.Format.fMP4="Fragmented MP4 (.mp4)"
 Basic.Settings.Output.Format.fMOV="Fragmented MOV (.mov)"
 Basic.Settings.Output.Format.TT.fragmented_mov="Fragmented MOV writes the recording in chunks and does not require the same finalization as traditional MOV files.\nThis ensures the file remains playable even if writing to disk is interrupted, for example, as a result of a BSOD or power loss.\n\nThis may not be compatible with all players and editors. Use File → Remux Recordings to convert the file into a more compatible format if necessary."

UI/ffmpeg-utils.cpp

@@ -185,6 +185,20 @@ static const unordered_map<string, unordered_set<string>> codec_compat = {
 		 "pcm_f32le",
 #endif
 	 }},
+	// Not part of FFmpeg, see obs-outputs module
+	{"hybrid_mp4",
+	 {
+		 "h264",
+		 "hevc",
+		 "av1",
+		 "aac",
+		 "opus",
+		 "alac",
+		 "flac",
+		 "pcm_s16le",
+		 "pcm_s24le",
+		 "pcm_f32le",
+	 }},
 	{"mov",
 	 {
 		 "h264",

UI/obs-app.cpp

@@ -1783,6 +1783,8 @@ string GetFormatExt(const char *container)
 	string ext = container;
 	if (ext == "fragmented_mp4")
 		ext = "mp4";
+	if (ext == "hybrid_mp4")
+		ext = "mp4";
 	else if (ext == "fragmented_mov")
 		ext = "mov";
 	else if (ext == "hls")

UI/window-basic-main-outputs.cpp

@@ -697,6 +697,9 @@ SimpleOutput::SimpleOutput(OBSBasic *main_) : BasicOutputHandler(main_)
 	if (!ffmpegOutput) {
 		bool useReplayBuffer = config_get_bool(main->Config(),
 						       "SimpleOutput", "RecRB");
+		const char *recFormat = config_get_string(
+			main->Config(), "SimpleOutput", "RecFormat2");
+
 		if (useReplayBuffer) {
 			OBSDataAutoRelease hotkey;
 			const char *str = config_get_string(
@@ -728,8 +731,10 @@ SimpleOutput::SimpleOutput(OBSBasic *main_) : BasicOutputHandler(main_)
 						  OBSReplayBufferSaved, this);
 		}
 
+		bool use_native = strcmp(recFormat, "hybrid_mp4") == 0;
 		fileOutput = obs_output_create(
-			"ffmpeg_muxer", "simple_file_output", nullptr, nullptr);
+			use_native ? "mp4_output" : "ffmpeg_muxer",
+			"simple_file_output", nullptr, nullptr);
 		if (!fileOutput)
 			throw "Failed to create recording output "
 			      "(simple output)";
@@ -1568,6 +1573,8 @@ AdvancedOutput::AdvancedOutput(OBSBasic *main_) : BasicOutputHandler(main_)
 		config_get_string(main->Config(), "AdvOut", "RecEncoder");
 	const char *recAudioEncoder =
 		config_get_string(main->Config(), "AdvOut", "RecAudioEncoder");
+	const char *recFormat =
+		config_get_string(main->Config(), "AdvOut", "RecFormat2");
 #ifdef __APPLE__
 	translate_macvth264_encoder(streamEncoder);
 	translate_macvth264_encoder(recordEncoder);
@@ -1623,8 +1630,10 @@ AdvancedOutput::AdvancedOutput(OBSBasic *main_) : BasicOutputHandler(main_)
 						  OBSReplayBufferSaved, this);
 		}
 
+		bool native_muxer = strcmp(recFormat, "hybrid_mp4") == 0;
 		fileOutput = obs_output_create(
-			"ffmpeg_muxer", "adv_file_output", nullptr, nullptr);
+			native_muxer ? "mp4_output" : "ffmpeg_muxer",
+			"adv_file_output", nullptr, nullptr);
 		if (!fileOutput)
 			throw "Failed to create recording output "
 			      "(advanced output)";

UI/window-basic-settings.cpp

@@ -1152,6 +1152,7 @@ void OBSBasicSettings::LoadFormats()
 	ui->simpleOutRecFormat->addItem(FORMAT_STR("MKV"), "mkv");
 	ui->simpleOutRecFormat->addItem(FORMAT_STR("MP4"), "mp4");
 	ui->simpleOutRecFormat->addItem(FORMAT_STR("MOV"), "mov");
+	ui->simpleOutRecFormat->addItem(FORMAT_STR("hMP4"), "hybrid_mp4");
 	ui->simpleOutRecFormat->addItem(FORMAT_STR("fMP4"), "fragmented_mp4");
 	ui->simpleOutRecFormat->addItem(FORMAT_STR("fMOV"), "fragmented_mov");
 	ui->simpleOutRecFormat->addItem(FORMAT_STR("TS"), "mpegts");
@@ -1160,6 +1161,7 @@ void OBSBasicSettings::LoadFormats()
 	ui->advOutRecFormat->addItem(FORMAT_STR("MKV"), "mkv");
 	ui->advOutRecFormat->addItem(FORMAT_STR("MP4"), "mp4");
 	ui->advOutRecFormat->addItem(FORMAT_STR("MOV"), "mov");
+	ui->advOutRecFormat->addItem(FORMAT_STR("hMP4"), "hybrid_mp4");
 	ui->advOutRecFormat->addItem(FORMAT_STR("fMP4"), "fragmented_mp4");
 	ui->advOutRecFormat->addItem(FORMAT_STR("fMOV"), "fragmented_mov");
 	ui->advOutRecFormat->addItem(FORMAT_STR("TS"), "mpegts");