initial commit, 4.5 stable

servers/movie_writer/SCsub

@@ -0,0 +1,6 @@
+#!/usr/bin/env python
+from misc.utility.scons_hints import *
+
+Import("env")
+
+env.add_source_files(env.servers_sources, "*.cpp")

servers/movie_writer/movie_writer.cpp

@@ -0,0 +1,261 @@
+/**************************************************************************/
+/*  movie_writer.cpp                                                      */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include "movie_writer.h"
+#include "core/config/project_settings.h"
+#include "core/io/dir_access.h"
+#include "core/os/time.h"
+#include "scene/main/window.h"
+#include "servers/audio/audio_driver_dummy.h"
+#include "servers/display_server.h"
+#include "servers/rendering_server.h"
+
+MovieWriter *MovieWriter::writers[MovieWriter::MAX_WRITERS];
+uint32_t MovieWriter::writer_count = 0;
+
+void MovieWriter::add_writer(MovieWriter *p_writer) {
+	ERR_FAIL_COND(writer_count == MAX_WRITERS);
+	writers[writer_count++] = p_writer;
+}
+
+MovieWriter *MovieWriter::find_writer_for_file(const String &p_file) {
+	for (int32_t i = writer_count - 1; i >= 0; i--) { // More recent last, to have override ability.
+		if (writers[i]->handles_file(p_file)) {
+			return writers[i];
+		}
+	}
+	return nullptr;
+}
+
+uint32_t MovieWriter::get_audio_mix_rate() const {
+	uint32_t ret = 48000;
+	GDVIRTUAL_CALL(_get_audio_mix_rate, ret);
+	return ret;
+}
+AudioServer::SpeakerMode MovieWriter::get_audio_speaker_mode() const {
+	AudioServer::SpeakerMode ret = AudioServer::SPEAKER_MODE_STEREO;
+	GDVIRTUAL_CALL(_get_audio_speaker_mode, ret);
+	return ret;
+}
+
+Error MovieWriter::write_begin(const Size2i &p_movie_size, uint32_t p_fps, const String &p_base_path) {
+	Error ret = ERR_UNCONFIGURED;
+	GDVIRTUAL_CALL(_write_begin, p_movie_size, p_fps, p_base_path, ret);
+	return ret;
+}
+
+Error MovieWriter::write_frame(const Ref<Image> &p_image, const int32_t *p_audio_data) {
+	Error ret = ERR_UNCONFIGURED;
+	GDVIRTUAL_CALL(_write_frame, p_image, p_audio_data, ret);
+	return ret;
+}
+
+void MovieWriter::write_end() {
+	GDVIRTUAL_CALL(_write_end);
+}
+
+bool MovieWriter::handles_file(const String &p_path) const {
+	bool ret = false;
+	GDVIRTUAL_CALL(_handles_file, p_path, ret);
+	return ret;
+}
+
+void MovieWriter::get_supported_extensions(List<String> *r_extensions) const {
+	Vector<String> exts;
+	GDVIRTUAL_CALL(_get_supported_extensions, exts);
+	for (int i = 0; i < exts.size(); i++) {
+		r_extensions->push_back(exts[i]);
+	}
+}
+
+void MovieWriter::begin(const Size2i &p_movie_size, uint32_t p_fps, const String &p_base_path) {
+	project_name = GLOBAL_GET("application/config/name");
+
+	print_line(vformat("Movie Maker mode enabled, recording movie at %d FPS...", p_fps));
+
+	// When using Display/Window/Stretch/Mode = Viewport, use the project's
+	// configured viewport size instead of the size of the window in the OS
+	Size2i actual_movie_size = p_movie_size;
+	String stretch_mode = GLOBAL_GET("display/window/stretch/mode");
+	if (stretch_mode == "viewport") {
+		actual_movie_size.width = GLOBAL_GET("display/window/size/viewport_width");
+		actual_movie_size.height = GLOBAL_GET("display/window/size/viewport_height");
+
+		print_line(vformat("Movie Maker mode using project viewport size: %dx%d",
+				actual_movie_size.width, actual_movie_size.height));
+	}
+
+	// Check for available disk space and warn the user if needed.
+	Ref<DirAccess> dir = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+	String path = p_base_path.get_basename();
+	if (path.is_relative_path()) {
+		path = "res://" + path;
+	}
+	dir->open(path);
+	if (dir->get_space_left() < 10 * Math::pow(1024.0, 3.0)) {
+		// Less than 10 GiB available.
+		WARN_PRINT(vformat("Current available space on disk is low (%s). MovieWriter will fail during movie recording if the disk runs out of available space.", String::humanize_size(dir->get_space_left())));
+	}
+
+	cpu_time = 0.0f;
+	gpu_time = 0.0f;
+	encoding_time_usec = 0;
+
+	mix_rate = get_audio_mix_rate();
+	AudioDriverDummy::get_dummy_singleton()->set_mix_rate(mix_rate);
+	AudioDriverDummy::get_dummy_singleton()->set_speaker_mode(AudioDriver::SpeakerMode(get_audio_speaker_mode()));
+	fps = p_fps;
+	if ((mix_rate % fps) != 0) {
+		WARN_PRINT("MovieWriter's audio mix rate (" + itos(mix_rate) + ") can not be divided by the recording FPS (" + itos(fps) + "). Audio may go out of sync over time.");
+	}
+
+	audio_channels = AudioDriverDummy::get_dummy_singleton()->get_channels();
+	audio_mix_buffer.resize(mix_rate * audio_channels / fps);
+
+	write_begin(actual_movie_size, p_fps, p_base_path);
+}
+
+void MovieWriter::_bind_methods() {
+	ClassDB::bind_static_method("MovieWriter", D_METHOD("add_writer", "writer"), &MovieWriter::add_writer);
+
+	GDVIRTUAL_BIND(_get_audio_mix_rate)
+	GDVIRTUAL_BIND(_get_audio_speaker_mode)
+
+	GDVIRTUAL_BIND(_handles_file, "path")
+
+	GDVIRTUAL_BIND(_write_begin, "movie_size", "fps", "base_path")
+	GDVIRTUAL_BIND(_write_frame, "frame_image", "audio_frame_block")
+	GDVIRTUAL_BIND(_write_end)
+
+	GLOBAL_DEF(PropertyInfo(Variant::INT, "editor/movie_writer/mix_rate", PROPERTY_HINT_RANGE, "8000,192000,1,suffix:Hz"), 48000);
+	GLOBAL_DEF(PropertyInfo(Variant::INT, "editor/movie_writer/speaker_mode", PROPERTY_HINT_ENUM, "Stereo,3.1,5.1,7.1"), 0);
+	GLOBAL_DEF(PropertyInfo(Variant::FLOAT, "editor/movie_writer/video_quality", PROPERTY_HINT_RANGE, "0.0,1.0,0.01"), 0.75);
+	GLOBAL_DEF(PropertyInfo(Variant::FLOAT, "editor/movie_writer/ogv/audio_quality", PROPERTY_HINT_RANGE, "-0.1,1.0,0.01"), 0.5);
+	GLOBAL_DEF(PropertyInfo(Variant::INT, "editor/movie_writer/ogv/encoding_speed", PROPERTY_HINT_ENUM, "Fastest (Lowest Efficiency):4,Fast (Low Efficiency):3,Slow (High Efficiency):2,Slowest (Highest Efficiency):1"), 4);
+	GLOBAL_DEF(PropertyInfo(Variant::INT, "editor/movie_writer/ogv/keyframe_interval", PROPERTY_HINT_RANGE, "1,1024,1"), 64);
+
+	// Used by the editor.
+	GLOBAL_DEF_BASIC("editor/movie_writer/movie_file", "");
+	GLOBAL_DEF_BASIC("editor/movie_writer/disable_vsync", false);
+	GLOBAL_DEF_BASIC(PropertyInfo(Variant::INT, "editor/movie_writer/fps", PROPERTY_HINT_RANGE, "1,300,1,suffix:FPS"), 60);
+}
+
+void MovieWriter::set_extensions_hint() {
+	RBSet<String> found;
+	for (uint32_t i = 0; i < writer_count; i++) {
+		List<String> extensions;
+		writers[i]->get_supported_extensions(&extensions);
+		for (const String &ext : extensions) {
+			found.insert(ext);
+		}
+	}
+
+	String ext_hint;
+
+	for (const String &S : found) {
+		if (ext_hint != "") {
+			ext_hint += ",";
+		}
+		ext_hint += "*." + S;
+	}
+	ProjectSettings::get_singleton()->set_custom_property_info(PropertyInfo(Variant::STRING, "editor/movie_writer/movie_file", PROPERTY_HINT_GLOBAL_SAVE_FILE, ext_hint));
+}
+
+void MovieWriter::add_frame() {
+	const int movie_time_seconds = Engine::get_singleton()->get_frames_drawn() / fps;
+	const int frame_remainder = Engine::get_singleton()->get_frames_drawn() % fps;
+	const String movie_time = vformat("%s:%s:%s:%s",
+			String::num(movie_time_seconds / 3600, 0).pad_zeros(2),
+			String::num((movie_time_seconds % 3600) / 60, 0).pad_zeros(2),
+			String::num(movie_time_seconds % 60, 0).pad_zeros(2),
+			String::num(frame_remainder, 0).pad_zeros(2));
+
+	Window *main_window = Window::get_from_id(DisplayServer::MAIN_WINDOW_ID);
+	if (main_window) {
+		main_window->set_title(vformat("MovieWriter: Frame %d (time: %s) - %s", Engine::get_singleton()->get_frames_drawn(), movie_time, project_name));
+	}
+
+	RID main_vp_rid = RenderingServer::get_singleton()->viewport_find_from_screen_attachment(DisplayServer::MAIN_WINDOW_ID);
+	RID main_vp_texture = RenderingServer::get_singleton()->viewport_get_texture(main_vp_rid);
+	Ref<Image> vp_tex = RenderingServer::get_singleton()->texture_2d_get(main_vp_texture);
+	if (RenderingServer::get_singleton()->viewport_is_using_hdr_2d(main_vp_rid)) {
+		vp_tex->convert(Image::FORMAT_RGBA8);
+		vp_tex->linear_to_srgb();
+	}
+
+	RenderingServer::get_singleton()->viewport_set_measure_render_time(main_vp_rid, true);
+	cpu_time += RenderingServer::get_singleton()->viewport_get_measured_render_time_cpu(main_vp_rid);
+	cpu_time += RenderingServer::get_singleton()->get_frame_setup_time_cpu();
+	gpu_time += RenderingServer::get_singleton()->viewport_get_measured_render_time_gpu(main_vp_rid);
+
+	AudioDriverDummy::get_dummy_singleton()->mix_audio(mix_rate / fps, audio_mix_buffer.ptr());
+
+	uint64_t encoding_start_usec = Time::get_singleton()->get_ticks_usec();
+	write_frame(vp_tex, audio_mix_buffer.ptr());
+	uint64_t encoding_end_usec = Time::get_singleton()->get_ticks_usec();
+	encoding_time_usec += encoding_end_usec - encoding_start_usec;
+}
+
+void MovieWriter::end() {
+	uint64_t encoding_start_usec = Time::get_singleton()->get_ticks_usec();
+	write_end();
+	uint64_t encoding_end_usec = Time::get_singleton()->get_ticks_usec();
+	encoding_time_usec += encoding_end_usec - encoding_start_usec;
+
+	// Print a report with various statistics.
+	print_line("--------------------------------------------------------------------------------");
+	String movie_path = Engine::get_singleton()->get_write_movie_path();
+	if (movie_path.is_relative_path()) {
+		// Print absolute path to make finding the file easier,
+		// and to make it clickable in terminal emulators that support this.
+		movie_path = ProjectSettings::get_singleton()->globalize_path("res://").path_join(movie_path);
+	}
+	print_line(vformat("Done recording movie at path: %s", movie_path));
+
+	const int movie_time_seconds = Engine::get_singleton()->get_frames_drawn() / fps;
+	const int frame_remainder = Engine::get_singleton()->get_frames_drawn() % fps;
+	const String movie_time = vformat("%s:%s:%s:%s",
+			String::num(movie_time_seconds / 3600, 0).pad_zeros(2),
+			String::num((movie_time_seconds % 3600) / 60, 0).pad_zeros(2),
+			String::num(movie_time_seconds % 60, 0).pad_zeros(2),
+			String::num(frame_remainder, 0).pad_zeros(2));
+
+	const int real_time_seconds = Time::get_singleton()->get_ticks_msec() / 1000;
+	const String real_time = vformat("%s:%s:%s",
+			String::num(real_time_seconds / 3600, 0).pad_zeros(2),
+			String::num((real_time_seconds % 3600) / 60, 0).pad_zeros(2),
+			String::num(real_time_seconds % 60, 0).pad_zeros(2));
+
+	print_line(vformat("%d frames at %d FPS (movie length: %s), recorded in %s (%d%% of real-time speed).", Engine::get_singleton()->get_frames_drawn(), fps, movie_time, real_time, (float(MAX(1, movie_time_seconds)) / MAX(1, real_time_seconds)) * 100));
+	print_line(vformat("CPU render time: %.2f seconds (average: %.2f ms/frame)", cpu_time / 1000, cpu_time / Engine::get_singleton()->get_frames_drawn()));
+	print_line(vformat("GPU render time: %.2f seconds (average: %.2f ms/frame)", gpu_time / 1000, gpu_time / Engine::get_singleton()->get_frames_drawn()));
+	print_line(vformat("Encoding time: %.2f seconds (average: %.2f ms/frame)", encoding_time_usec / 1000000.f, encoding_time_usec / 1000.f / Engine::get_singleton()->get_frames_drawn()));
+	print_line("--------------------------------------------------------------------------------");
+}

servers/movie_writer/movie_writer.h

@@ -0,0 +1,91 @@
+/**************************************************************************/
+/*  movie_writer.h                                                        */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "core/io/image.h"
+#include "core/templates/local_vector.h"
+#include "servers/audio_server.h"
+
+class MovieWriter : public Object {
+	GDCLASS(MovieWriter, Object);
+
+	uint64_t fps = 0;
+	uint64_t mix_rate = 0;
+	uint32_t audio_channels = 0;
+
+	float cpu_time = 0.0f;
+	float gpu_time = 0.0f;
+	uint64_t encoding_time_usec = 0;
+
+	String project_name;
+
+	LocalVector<int32_t> audio_mix_buffer;
+
+	enum {
+		MAX_WRITERS = 8
+	};
+	static MovieWriter *writers[];
+	static uint32_t writer_count;
+
+protected:
+	virtual uint32_t get_audio_mix_rate() const;
+	virtual AudioServer::SpeakerMode get_audio_speaker_mode() const;
+
+	virtual Error write_begin(const Size2i &p_movie_size, uint32_t p_fps, const String &p_base_path);
+	virtual Error write_frame(const Ref<Image> &p_image, const int32_t *p_audio_data);
+	virtual void write_end();
+
+	GDVIRTUAL0RC_REQUIRED(uint32_t, _get_audio_mix_rate)
+	GDVIRTUAL0RC_REQUIRED(AudioServer::SpeakerMode, _get_audio_speaker_mode)
+
+	GDVIRTUAL1RC_REQUIRED(bool, _handles_file, const String &)
+	GDVIRTUAL0RC_REQUIRED(Vector<String>, _get_supported_extensions)
+
+	GDVIRTUAL3R_REQUIRED(Error, _write_begin, const Size2i &, uint32_t, const String &)
+	GDVIRTUAL2R_REQUIRED(Error, _write_frame, const Ref<Image> &, GDExtensionConstPtr<int32_t>)
+	GDVIRTUAL0_REQUIRED(_write_end)
+
+	static void _bind_methods();
+
+public:
+	virtual bool handles_file(const String &p_path) const;
+	virtual void get_supported_extensions(List<String> *r_extensions) const;
+
+	static void add_writer(MovieWriter *p_writer);
+	static MovieWriter *find_writer_for_file(const String &p_file);
+
+	void begin(const Size2i &p_movie_size, uint32_t p_fps, const String &p_base_path);
+	void add_frame();
+
+	static void set_extensions_hint();
+
+	void end();
+};

servers/movie_writer/movie_writer_pngwav.cpp

@@ -0,0 +1,170 @@
+/**************************************************************************/
+/*  movie_writer_pngwav.cpp                                               */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include "movie_writer_pngwav.h"
+#include "core/config/project_settings.h"
+#include "core/io/dir_access.h"
+
+uint32_t MovieWriterPNGWAV::get_audio_mix_rate() const {
+	return mix_rate;
+}
+AudioServer::SpeakerMode MovieWriterPNGWAV::get_audio_speaker_mode() const {
+	return speaker_mode;
+}
+
+void MovieWriterPNGWAV::get_supported_extensions(List<String> *r_extensions) const {
+	r_extensions->push_back("png");
+}
+
+bool MovieWriterPNGWAV::handles_file(const String &p_path) const {
+	return p_path.get_extension().to_lower() == "png";
+}
+
+String MovieWriterPNGWAV::zeros_str(uint32_t p_index) {
+	char zeros[MAX_TRAILING_ZEROS + 1];
+	for (uint32_t i = 0; i < MAX_TRAILING_ZEROS; i++) {
+		uint32_t idx = MAX_TRAILING_ZEROS - i - 1;
+		uint32_t digit = (p_index / uint32_t(Math::pow(double(10), double(idx)))) % 10;
+		zeros[i] = '0' + digit;
+	}
+	zeros[MAX_TRAILING_ZEROS] = 0;
+	return zeros;
+}
+
+Error MovieWriterPNGWAV::write_begin(const Size2i &p_movie_size, uint32_t p_fps, const String &p_base_path) {
+	// Quick & Dirty PNGWAV Code based on - https://docs.microsoft.com/en-us/windows/win32/directshow/avi-riff-file-reference
+
+	base_path = p_base_path.get_basename();
+	if (base_path.is_relative_path()) {
+		base_path = "res://" + base_path;
+	}
+
+	{
+		//Remove existing files before writing anew
+		uint32_t idx = 0;
+		Ref<DirAccess> d = DirAccess::open(base_path.get_base_dir());
+		ERR_FAIL_COND_V(d.is_null(), FAILED);
+
+		String file = base_path.get_file();
+		while (true) {
+			String path = file + zeros_str(idx) + ".png";
+			if (d->remove(path) != OK) {
+				break;
+			}
+		}
+	}
+
+	f_wav = FileAccess::open(base_path + ".wav", FileAccess::WRITE_READ);
+	ERR_FAIL_COND_V(f_wav.is_null(), ERR_CANT_OPEN);
+
+	fps = p_fps;
+
+	f_wav->store_buffer((const uint8_t *)"RIFF", 4);
+	int total_size = 4 /* WAVE */ + 8 /* fmt+size */ + 16 /* format */ + 8 /* data+size */;
+	f_wav->store_32(total_size); //will store final later
+	f_wav->store_buffer((const uint8_t *)"WAVE", 4);
+
+	/* FORMAT CHUNK */
+
+	f_wav->store_buffer((const uint8_t *)"fmt ", 4);
+
+	uint32_t channels = 2;
+	switch (speaker_mode) {
+		case AudioServer::SPEAKER_MODE_STEREO:
+			channels = 2;
+			break;
+		case AudioServer::SPEAKER_SURROUND_31:
+			channels = 4;
+			break;
+		case AudioServer::SPEAKER_SURROUND_51:
+			channels = 6;
+			break;
+		case AudioServer::SPEAKER_SURROUND_71:
+			channels = 8;
+			break;
+	}
+
+	f_wav->store_32(16); //standard format, no extra fields
+	f_wav->store_16(1); // compression code, standard PCM
+	f_wav->store_16(channels); //CHANNELS: 2
+
+	f_wav->store_32(mix_rate);
+
+	/* useless stuff the format asks for */
+
+	int bits_per_sample = 32;
+	int blockalign = bits_per_sample / 8 * channels;
+	int bytes_per_sec = mix_rate * blockalign;
+
+	audio_block_size = (mix_rate / fps) * blockalign;
+
+	f_wav->store_32(bytes_per_sec);
+	f_wav->store_16(blockalign); // block align (unused)
+	f_wav->store_16(bits_per_sample);
+
+	/* DATA CHUNK */
+
+	f_wav->store_buffer((const uint8_t *)"data", 4);
+
+	f_wav->store_32(0); //data size... wooh
+	wav_data_size_pos = f_wav->get_position();
+
+	return OK;
+}
+
+Error MovieWriterPNGWAV::write_frame(const Ref<Image> &p_image, const int32_t *p_audio_data) {
+	ERR_FAIL_COND_V(f_wav.is_null(), ERR_UNCONFIGURED);
+
+	Vector<uint8_t> png_buffer = p_image->save_png_to_buffer();
+
+	Ref<FileAccess> fi = FileAccess::open(base_path + zeros_str(frame_count) + ".png", FileAccess::WRITE);
+	fi->store_buffer(png_buffer.ptr(), png_buffer.size());
+	f_wav->store_buffer((const uint8_t *)p_audio_data, audio_block_size);
+
+	frame_count++;
+
+	return OK;
+}
+
+void MovieWriterPNGWAV::write_end() {
+	if (f_wav.is_valid()) {
+		uint32_t total_size = 4 /* WAVE */ + 8 /* fmt+size */ + 16 /* format */ + 8 /* data+size */;
+		uint32_t datasize = f_wav->get_position() - wav_data_size_pos;
+		f_wav->seek(4);
+		f_wav->store_32(total_size + datasize);
+		f_wav->seek(0x28);
+		f_wav->store_32(datasize);
+	}
+}
+
+MovieWriterPNGWAV::MovieWriterPNGWAV() {
+	mix_rate = GLOBAL_GET("editor/movie_writer/mix_rate");
+	speaker_mode = AudioServer::SpeakerMode(int(GLOBAL_GET("editor/movie_writer/speaker_mode")));
+}

servers/movie_writer/movie_writer_pngwav.h

@@ -0,0 +1,68 @@
+/**************************************************************************/
+/*  movie_writer_pngwav.h                                                 */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "servers/movie_writer/movie_writer.h"
+
+class MovieWriterPNGWAV : public MovieWriter {
+	GDCLASS(MovieWriterPNGWAV, MovieWriter)
+
+	enum {
+		MAX_TRAILING_ZEROS = 8 // more than 10 days at 60fps, no hard drive can put up with this anyway :)
+	};
+
+	uint32_t mix_rate = 48000;
+	AudioServer::SpeakerMode speaker_mode = AudioServer::SPEAKER_MODE_STEREO;
+	String base_path;
+	uint32_t frame_count = 0;
+	uint32_t fps = 0;
+
+	uint32_t audio_block_size = 0;
+
+	Ref<FileAccess> f_wav;
+	uint32_t wav_data_size_pos = 0;
+
+	String zeros_str(uint32_t p_index);
+
+protected:
+	virtual uint32_t get_audio_mix_rate() const override;
+	virtual AudioServer::SpeakerMode get_audio_speaker_mode() const override;
+	virtual void get_supported_extensions(List<String> *r_extensions) const override;
+
+	virtual Error write_begin(const Size2i &p_movie_size, uint32_t p_fps, const String &p_base_path) override;
+	virtual Error write_frame(const Ref<Image> &p_image, const int32_t *p_audio_data) override;
+	virtual void write_end() override;
+
+	virtual bool handles_file(const String &p_path) const override;
+
+public:
+	MovieWriterPNGWAV();
+};