Downloadable engines (#34)

* Add blender_downloader.py

* Add engine_manager.py

* Add additional methods to engine_manager.py

* Refactor file layout to make engines on par with workers

* Add system platform info to status response

* Default to using system platform / cpu if none are provided

* Add API to download an engine and some general cleanup

* Add method to delete downloaded engine

* Add API calls to download engines and delete downloads

* Misc fixes

requirements.txt

@@ -9,4 +9,6 @@ json2html~=1.3.0
 SQLAlchemy~=2.0.15
 Pillow==9.5.0
 zeroconf==0.64.1
-Pypubsub~=4.0.3
+Pypubsub~=4.0.3
+tqdm==4.66.1
+dmglib

src/api_server.py

@@ -21,11 +21,12 @@ from flask import Flask, request, render_template, send_file, after_this_request
 from werkzeug.utils import secure_filename
 
 from src.distributed_job_manager import DistributedJobManager
+from src.engines.engine_manager import EngineManager
 from src.render_queue import RenderQueue, JobNotFoundError
 from src.server_proxy import RenderServerProxy
 from src.utilities.server_helper import generate_thumbnail_for_job
 from src.utilities.zeroconf_server import ZeroconfServer
-from src.worker_factory import RenderWorkerFactory
+from src.workers.worker_factory import RenderWorkerFactory
 from src.workers.base_worker import string_to_status, RenderStatus
 
 logger = logging.getLogger()
@@ -499,14 +500,21 @@ def clear_history():
 def status():
     renderer_data = {}
     for render_class in RenderWorkerFactory.supported_classes():
-        if render_class.engine.renderer_path():  # only return renderers installed on host
+        if render_class.engine.default_renderer_path():  # only return renderers installed on host
             renderer_data[render_class.engine.name()] = \
-                {'version': render_class.engine.version(),
+                {'versions': EngineManager.all_versions_for_engine(render_class.engine.name()),
                  'is_available': RenderQueue.is_available_for_job(render_class.engine.name())
                  }
 
+    # Get system info
+    system_platform = platform.system().lower().replace('darwin', 'macos')
+    system_platform_version = platform.mac_ver()[0] if system_platform == 'macos' else platform.release().lower()
+    system_cpu = platform.machine().lower().replace('amd64', 'x64')
+
     return {"timestamp": datetime.now().isoformat(),
-            "platform": platform.platform(),
+            "system_platform": system_platform,
+            "system_platform_version": system_platform_version,
+            "system_cpu": system_cpu,
             "cpu_percent": psutil.cpu_percent(percpu=False),
             "cpu_percent_per_cpu": psutil.cpu_percent(percpu=True),
             "cpu_count": psutil.cpu_count(logical=False),
@@ -523,17 +531,36 @@ def status():
 @server.get('/api/renderer_info')
 def renderer_info():
     renderer_data = {}
-    for r in RenderWorkerFactory.supported_renderers():
+    for engine_name in RenderWorkerFactory.supported_renderers():
-        engine = RenderWorkerFactory.class_for_name(r).engine
+        engine = RenderWorkerFactory.class_for_name(engine_name).engine
-        if engine.renderer_path():
+        if engine.default_renderer_path():
-            renderer_data[r] = {'is_available': RenderQueue.is_available_for_job(engine.name()),
+
-                                'version': engine.version(),
+            # Get all installed versions of engine
+            renderer_data[engine_name] = {'is_available': RenderQueue.is_available_for_job(engine.name()),
+                                'versions': EngineManager.all_versions_for_engine(engine_name),
                                 'supported_extensions': engine.supported_extensions,
-                                'supported_export_formats': engine.get_output_formats(),
+                                'supported_export_formats': engine().get_output_formats()}
-                                'path': engine.renderer_path()}
     return renderer_data
 
 
+@server.post('/api/download_engine')
+def download_engine():
+    download_result = EngineManager.download_engine(request.args.get('engine'),
+                                                    request.args.get('version'),
+                                                    request.args.get('system_os'),
+                                                    request.args.get('cpu'))
+    return download_result if download_result else ("Error downloading requested engine", 500)
+
+
+@server.post('/api/delete_engine')
+def delete_engine_download():
+    delete_result = EngineManager.delete_engine_download(request.args.get('engine'),
+                                                         request.args.get('version'),
+                                                         request.args.get('system_os'),
+                                                         request.args.get('cpu'))
+    return "Success" if delete_result else ("Error deleting requested engine", 500)
+
+
 @server.route('/upload')
 def upload_file_page():
     return render_template('upload.html', supported_renderers=RenderWorkerFactory.supported_renderers())
@@ -563,6 +590,10 @@ def start_server(background_thread=False):
     server.config['MAX_CONTENT_PATH'] = config['max_content_path']
     server.config['enable_split_jobs'] = config.get('enable_split_jobs', False)
 
+    # Setup directory for saving engines to
+    EngineManager.engines_path = os.path.join(os.path.join(os.path.expanduser(config['upload_folder']), 'engines'))
+    os.makedirs(EngineManager.engines_path, exist_ok=True)
+
     # disable most Flask logging
     flask_log = logging.getLogger('werkzeug')
     flask_log.setLevel(config.get('flask_log_level', 'ERROR').upper())

src/client/new_job_window.py

@@ -224,7 +224,7 @@ class NewJobWindow(Frame):
             return
 
         if renderer == 'blender':
-            self.project_info = Blender.get_scene_info(self.chosen_file)
+            self.project_info = Blender().get_scene_info(self.chosen_file)
             self.draw_blender_settings()
         elif renderer == 'ffmpeg':
             f = FFMPEG.get_frame_count(self.chosen_file)
@@ -371,7 +371,7 @@ class NewJobWindow(Frame):
             if renderer == 'blender':
                 if self.blender_pack_textures.get():
                     self.progress_label.configure(text="Packing Blender file...")
-                    new_path = Blender.pack_project_file(project_path=input_path, timeout=300)
+                    new_path = Blender().pack_project_file(project_path=input_path, timeout=300)
                     if new_path:
                         logger.info(f"New Path is now {new_path}")
                         input_path = new_path

src/engines/aerender_engine.py

@@ -8,16 +8,15 @@ class AERender(BaseRenderEngine):
 
     supported_extensions = ['.aep']
 
-    @classmethod
+    def version(self):
-    def version(cls):
         version = None
         try:
-            render_path = cls.renderer_path()
+            render_path = self.renderer_path()
             if render_path:
                 ver_out = subprocess.check_output([render_path, '-version'], timeout=SUBPROCESS_TIMEOUT)
                 version = ver_out.decode('utf-8').split(" ")[-1].strip()
         except Exception as e:
-            logger.error(f'Failed to get {cls.name()} version: {e}')
+            logger.error(f'Failed to get {self.name()} version: {e}')
         return version
 
     @classmethod

src/engines/base_engine.py

@@ -11,12 +11,18 @@ class BaseRenderEngine(object):
     install_paths = []
     supported_extensions = []
 
+    def __init__(self, custom_path=None):
+        self.custom_renderer_path = custom_path
+
+    def renderer_path(self):
+        return self.custom_renderer_path or self.default_renderer_path()
+
     @classmethod
     def name(cls):
         return cls.__name__.lower()
 
     @classmethod
-    def renderer_path(cls):
+    def default_renderer_path(cls):
         path = None
         try:
             path = subprocess.check_output(['which', cls.name()], timeout=SUBPROCESS_TIMEOUT).decode('utf-8').strip()
@@ -28,13 +34,11 @@ class BaseRenderEngine(object):
             logger.exception(e)
         return path
 
-    @classmethod
+    def version(self):
-    def version(cls):
         raise NotImplementedError("version not implemented")
 
-    @classmethod
+    def get_help(self):
-    def get_help(cls):
+        path = self.renderer_path()
-        path = cls.renderer_path()
         if not path:
             raise FileNotFoundError("renderer path not found")
         help_doc = subprocess.check_output([path, '-h'], stderr=subprocess.STDOUT,

src/engines/blender_engine.py

@@ -14,11 +14,10 @@ class Blender(BaseRenderEngine):
     install_paths = ['/Applications/Blender.app/Contents/MacOS/Blender']
     supported_extensions = ['.blend']
 
-    @classmethod
+    def version(self):
-    def version(cls):
         version = None
         try:
-            render_path = cls.renderer_path()
+            render_path = self.renderer_path()
             if render_path:
                 ver_out = subprocess.check_output([render_path, '-v'], timeout=SUBPROCESS_TIMEOUT)
                 version = ver_out.decode('utf-8').splitlines()[0].replace('Blender', '').strip()
@@ -26,17 +25,15 @@ class Blender(BaseRenderEngine):
             logger.error(f'Failed to get Blender version: {e}')
         return version
 
-    @classmethod
+    def get_output_formats(self):
-    def get_output_formats(cls):
+        format_string = self.get_help().split('Format Options')[-1].split('Animation Playback Options')[0]
-        format_string = cls.get_help().split('Format Options')[-1].split('Animation Playback Options')[0]
         formats = re.findall(r"'([A-Z_0-9]+)'", format_string)
         return formats
 
-    @classmethod
+    def run_python_expression(self, project_path, python_expression, timeout=None):
-    def run_python_expression(cls, project_path, python_expression, timeout=None):
         if os.path.exists(project_path):
             try:
-                return subprocess.run([cls.renderer_path(), '-b', project_path, '--python-expr', python_expression],
+                return subprocess.run([self.renderer_path(), '-b', project_path, '--python-expr', python_expression],
                                       capture_output=True, timeout=timeout)
             except Exception as e:
                 logger.warning(f"Error running python expression in blender: {e}")
@@ -44,11 +41,10 @@ class Blender(BaseRenderEngine):
         else:
             raise FileNotFoundError(f'Project file not found: {project_path}')
 
-    @classmethod
+    def run_python_script(self, project_path, script_path, timeout=None):
-    def run_python_script(cls, project_path, script_path, timeout=None):
         if os.path.exists(project_path) and os.path.exists(script_path):
             try:
-                return subprocess.run([cls.renderer_path(), '-b', project_path, '--python', script_path],
+                return subprocess.run([self.default_renderer_path(), '-b', project_path, '--python', script_path],
                                       capture_output=True, timeout=timeout)
             except Exception as e:
                 logger.warning(f"Error running python expression in blender: {e}")
@@ -59,12 +55,11 @@ class Blender(BaseRenderEngine):
             raise FileNotFoundError(f'Python script not found: {script_path}')
         raise Exception("Uncaught exception")
 
-    @classmethod
+    def get_scene_info(self, project_path, timeout=10):
-    def get_scene_info(cls, project_path, timeout=10):
         scene_info = {}
         try:
-            results = cls.run_python_script(project_path, os.path.join(os.path.dirname(os.path.realpath(__file__)),
+            results = self.run_python_script(project_path, os.path.join(os.path.dirname(os.path.realpath(__file__)),
-                                            'scripts', 'blender', 'get_file_info.py'), timeout=timeout)
+                                                                        'scripts', 'blender', 'get_file_info.py'), timeout=timeout)
             result_text = results.stdout.decode()
             for line in result_text.splitlines():
                 if line.startswith('SCENE_DATA:'):
@@ -77,13 +72,12 @@ class Blender(BaseRenderEngine):
             logger.error(f'Error getting file details for .blend file: {e}')
         return scene_info
 
-    @classmethod
+    def pack_project_file(self, project_path, timeout=30):
-    def pack_project_file(cls, project_path, timeout=30):
         # Credit to L0Lock for pack script - https://blender.stackexchange.com/a/243935
         try:
             logger.info(f"Starting to pack Blender file: {project_path}")
-            results = cls.run_python_script(project_path, os.path.join(os.path.dirname(os.path.realpath(__file__)),
+            results = self.run_python_script(project_path, os.path.join(os.path.dirname(os.path.realpath(__file__)),
-                                            'scripts', 'blender', 'pack_project.py'), timeout=timeout)
+                                                                       'scripts', 'blender', 'pack_project.py'), timeout=timeout)
 
             result_text = results.stdout.decode()
             dir_name = os.path.dirname(project_path)

src/engines/engine_manager.py

@@ -0,0 +1,128 @@
+import os
+import logging
+import platform
+import shutil
+
+try:
+    from .blender_engine import Blender
+except ImportError:
+    from blender_engine import Blender
+try:
+    from .ffmpeg_engine import FFMPEG
+except ImportError:
+    from ffmpeg_engine import FFMPEG
+
+logger = logging.getLogger()
+
+
+class EngineManager:
+
+    engines_path = "~/zordon-uploads/engines"
+
+    @classmethod
+    def supported_engines(cls):
+        return [Blender, FFMPEG]
+
+    @classmethod
+    def all_engines(cls):
+        results = []
+        # Parse downloaded engine directory
+        try:
+            all_items = os.listdir(cls.engines_path)
+            all_directories = [item for item in all_items if os.path.isdir(os.path.join(cls.engines_path, item))]
+
+            for directory in all_directories:
+                # Split the input string by dashes to get segments
+                segments = directory.split('-')
+
+                # Define the keys for each word
+                keys = ["engine", "version", "system_os", "cpu"]
+
+                # Create a dictionary with named keys
+                executable_names = {'linux': 'blender', 'windows': 'blender.exe', 'macos': 'Blender.app'}
+                result_dict = {keys[i]: segments[i] for i in range(min(len(keys), len(segments)))}
+                result_dict['path'] = os.path.join(cls.engines_path, directory, executable_names[result_dict['system_os']])
+                result_dict['type'] = 'managed'
+                results.append(result_dict)
+        except FileNotFoundError:
+            logger.warning("Cannot find local engines download directory")
+
+        # add system installs to this list
+        for eng in cls.supported_engines():
+            if eng.default_renderer_path():
+                results.append({'engine': eng.name(), 'version': eng().version(),
+                                'system_os': cls.system_os(),
+                                'cpu': cls.system_cpu(),
+                                'path': eng.default_renderer_path(), 'type': 'system'})
+
+        return results
+
+    @classmethod
+    def all_versions_for_engine(cls, engine):
+        return [x for x in cls.all_engines() if x['engine'] == engine]
+
+    @classmethod
+    def newest_engine_version(cls, engine, system_os=None, cpu=None):
+        system_os = system_os or cls.system_os()
+        cpu = cpu or cls.system_cpu()
+
+        try:
+            filtered = [x for x in cls.all_engines() if x['engine'] == engine and x['system_os'] == system_os and x['cpu'] == cpu]
+            versions = sorted(filtered, key=lambda x: x['version'], reverse=True)
+            return versions[0]
+        except IndexError:
+            logger.error(f"Cannot find newest engine version for {engine}-{system_os}-{cpu}")
+            return None
+
+    @classmethod
+    def has_engine_version(cls, engine, version, system_os=None, cpu=None):
+        system_os = system_os or cls.system_os()
+        cpu = cpu or cls.system_cpu()
+
+        filtered = [x for x in cls.all_engines() if
+                    x['engine'] == engine and x['system_os'] == system_os and x['cpu'] == cpu and x['version'] == version]
+        return filtered[0] if filtered else False
+
+    @staticmethod
+    def system_os():
+        return platform.system().lower().replace('darwin', 'macos')
+
+    @staticmethod
+    def system_cpu():
+        return platform.machine().lower().replace('amd64', 'x64')
+
+    @classmethod
+    def download_engine(cls, engine, version, system_os=None, cpu=None):
+        existing_download = cls.has_engine_version(engine, version, system_os, cpu)
+        if existing_download:
+            logger.info(f"Requested download of {engine} {version}, but local copy already exists")
+            return existing_download
+
+        if engine == "blender":
+            from .scripts.blender.blender_downloader import BlenderDownloader
+            logger.info(f"Requesting download of {engine} {version}")
+            if BlenderDownloader.download_engine(version, download_location=cls.engines_path, system_os=system_os, cpu=cpu):
+                return cls.has_engine_version(engine, version, system_os, cpu)
+            else:
+                logger.error("Error downloading Engine")
+
+        return None  # Return None to indicate an error
+
+    @classmethod
+    def delete_engine_download(cls, engine, version, system_os=None, cpu=None):
+        logger.info(f"Requested deletion of engine: {engine}-{version}")
+        found = cls.has_engine_version(engine, version, system_os, cpu)
+        if found:
+            dir_path = os.path.dirname(found['path'])
+            shutil.rmtree(dir_path, ignore_errors=True)
+            logger.info(f"Engine {engine}-{version}-{found['system_os']}-{found['cpu']} successfully deleted")
+            return True
+        else:
+            logger.error(f"Cannot find engine: {engine}-{version}")
+
+
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+
+    # print(EngineManager.newest_engine_version('blender', 'macos', 'arm64'))
+    EngineManager.delete_engine_download('blender', '3.2.1', 'windows', 'x64')

src/engines/ffmpeg_engine.py

@@ -7,11 +7,10 @@ import re
 
 class FFMPEG(BaseRenderEngine):
 
-    @classmethod
+    def version(self):
-    def version(cls):
         version = None
         try:
-            ver_out = subprocess.check_output([cls.renderer_path(), '-version'],
+            ver_out = subprocess.check_output([self.renderer_path(), '-version'],
                                               timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
             match = re.match(".*version\s*(\S+)\s*Copyright", ver_out)
             if match:
@@ -20,29 +19,25 @@ class FFMPEG(BaseRenderEngine):
             logger.error("Failed to get FFMPEG version: {}".format(e))
         return version
 
-    @classmethod
+    def get_encoders(self):
-    def get_encoders(cls):
+        raw_stdout = subprocess.check_output([self.renderer_path(), '-encoders'], stderr=subprocess.DEVNULL,
-        raw_stdout = subprocess.check_output([cls.renderer_path(), '-encoders'], stderr=subprocess.DEVNULL,
+                                             timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
-                                               timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
         pattern = '(?P<type>[VASFXBD.]{6})\s+(?P<name>\S{2,})\s+(?P<description>.*)'
         encoders = [m.groupdict() for m in re.finditer(pattern, raw_stdout)]
         return encoders
 
-    @classmethod
+    def get_all_formats(self):
-    def get_all_formats(cls):
+        raw_stdout = subprocess.check_output([self.renderer_path(), '-formats'], stderr=subprocess.DEVNULL,
-        raw_stdout = subprocess.check_output([cls.renderer_path(), '-formats'], stderr=subprocess.DEVNULL,
+                                             timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
-                                              timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
         pattern = '(?P<type>[DE]{1,2})\s+(?P<name>\S{2,})\s+(?P<description>.*)'
         formats = [m.groupdict() for m in re.finditer(pattern, raw_stdout)]
         return formats
 
-    @classmethod
+    def get_output_formats(self):
-    def get_output_formats(cls):
+        return [x for x in self.get_all_formats() if 'E' in x['type'].upper()]
-        return [x for x in cls.get_all_formats() if 'E' in x['type'].upper()]
 
-    @classmethod
+    def get_frame_count(self, path_to_file):
-    def get_frame_count(cls, path_to_file):
+        raw_stdout = subprocess.check_output([self.default_renderer_path(), '-i', path_to_file, '-map', '0:v:0', '-c', 'copy',
-        raw_stdout = subprocess.check_output([cls.renderer_path(), '-i', path_to_file, '-map', '0:v:0', '-c', 'copy',
                                                '-f', 'null', '-'], stderr=subprocess.STDOUT,
                                               timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
         match = re.findall(r'frame=\s*(\d+)', raw_stdout)

src/engines/scripts/blender/blender_downloader.py

@@ -0,0 +1,206 @@
+import logging
+import os
+import re
+import platform
+import shutil
+import tarfile
+import tempfile
+import zipfile
+
+import requests
+from tqdm import tqdm
+
+# url = "https://download.blender.org/release/"
+url = "https://ftp.nluug.nl/pub/graphics/blender/release/"  # much faster mirror for testing
+
+logger = logging.getLogger()
+supported_formats = ['.zip', '.tar.xz', '.dmg']
+
+
+class BlenderDownloader:
+
+    @staticmethod
+    def get_major_versions():
+        try:
+            response = requests.get(url)
+            response.raise_for_status()
+
+            # Use regex to find all the <a> tags and extract the href attribute
+            link_pattern = r'<a href="([^"]+)">Blender(\d+[^<]+)</a>'
+            link_matches = re.findall(link_pattern, response.text)
+
+            major_versions = [link[-1].strip('/') for link in link_matches]
+            major_versions.sort(reverse=True)
+            return major_versions
+        except requests.exceptions.RequestException as e:
+            logger.error(f"Error: {e}")
+        return None
+
+    @staticmethod
+    def get_minor_versions(major_version, system_os=None, cpu=None):
+
+        base_url = url + 'Blender' + major_version
+
+        response = requests.get(base_url)
+        response.raise_for_status()
+
+        versions_pattern = r'<a href="(?P<file>[^"]+)">blender-(?P<version>[\d\.]+)-(?P<system_os>\w+)-(?P<cpu>\w+).*</a>'
+        versions_data = [match.groupdict() for match in re.finditer(versions_pattern, response.text)]
+
+        # Filter to just the supported formats
+        versions_data = [item for item in versions_data if any(item["file"].endswith(ext) for ext in supported_formats)]
+
+        if system_os:
+            versions_data = [x for x in versions_data if x['system_os'] == system_os]
+        if cpu:
+            versions_data = [x for x in versions_data if x['cpu'] == cpu]
+
+        for v in versions_data:
+            v['url'] = os.path.join(base_url, v['file'])
+
+        versions_data = sorted(versions_data, key=lambda x: x['version'], reverse=True)
+        return versions_data
+
+    @staticmethod
+    def find_LTS_versions():
+        response = requests.get('https://www.blender.org/download/lts/')
+        response.raise_for_status()
+
+        lts_pattern = r'https://www.blender.org/download/lts/(\d+-\d+)/'
+        lts_matches = re.findall(lts_pattern, response.text)
+        lts_versions = [ver.replace('-', '.') for ver in list(set(lts_matches))]
+        lts_versions.sort(reverse=True)
+
+        return lts_versions
+
+    @classmethod
+    def find_most_recent_version(cls, system_os, cpu, lts_only=False):
+        try:
+            major_version = cls.find_LTS_versions()[0] if lts_only else cls.get_major_versions()[0]
+            most_recent = cls.get_minor_versions(major_version, system_os, cpu)[0]
+            return most_recent
+        except IndexError:
+            logger.error("Cannot find a most recent version")
+
+    @classmethod
+    def download_engine(cls, version, download_location, system_os=None, cpu=None):
+        system_os = system_os or platform.system().lower().replace('darwin', 'macos')
+        cpu = cpu or platform.machine().lower().replace('amd64', 'x64')
+
+        try:
+            logger.info(f"Requesting download of blender-{version}-{system_os}-{cpu}")
+            major_version = '.'.join(version.split('.')[:2])
+            minor_versions = [x for x in cls.get_minor_versions(major_version, system_os, cpu) if x['version'] == version]
+            # we get the URL instead of calculating it ourselves. May change this
+
+            cls.download_and_extract_app(remote_url=minor_versions[0]['url'], download_location=download_location)
+        except IndexError:
+            logger.error("Cannot find requested engine")
+
+    @classmethod
+    def download_and_extract_app(cls, remote_url, download_location):
+
+        binary_path = None
+
+        # Create a temp download directory
+        temp_download_dir = tempfile.mkdtemp()
+        downloaded_file_path = os.path.join(temp_download_dir, os.path.basename(remote_url))
+
+        try:
+            output_dir_name = os.path.basename(remote_url)
+            for fmt in supported_formats:
+                output_dir_name = output_dir_name.split(fmt)[0]
+
+            if os.path.exists(os.path.join(download_location, output_dir_name)):
+                logger.error(f"Engine download for {output_dir_name} already exists")
+                return
+
+            if not os.path.exists(downloaded_file_path):
+                # Make a GET request to the URL with stream=True to enable streaming
+                logger.info(f"Downloading {output_dir_name} from {remote_url}")
+                response = requests.get(remote_url, stream=True)
+
+                # Check if the request was successful
+                if response.status_code == 200:
+                    # Get the total file size from the "Content-Length" header
+                    file_size = int(response.headers.get("Content-Length", 0))
+
+                    # Create a progress bar using tqdm
+                    progress_bar = tqdm(total=file_size, unit="B", unit_scale=True)
+
+                    # Open a file for writing in binary mode
+                    with open(downloaded_file_path, "wb") as file:
+                        for chunk in response.iter_content(chunk_size=1024):
+                            if chunk:
+                                # Write the chunk to the file
+                                file.write(chunk)
+                                # Update the progress bar
+                                progress_bar.update(len(chunk))
+
+                    # Close the progress bar
+                    progress_bar.close()
+                    logger.info(f"Successfully downloaded {os.path.basename(downloaded_file_path)}")
+                else:
+                    logger.error(f"Failed to download the file. Status code: {response.status_code}")
+
+            os.makedirs(download_location, exist_ok=True)
+
+            # Extract the downloaded Blender file
+            # Linux - Process .tar.xz files
+            if downloaded_file_path.lower().endswith('.tar.xz'):
+                try:
+                    with tarfile.open(downloaded_file_path, 'r:xz') as tar:
+                        tar.extractall(path=download_location)
+                    os.path.join(download_location, output_dir_name, 'blender')
+                    logger.info(f'Successfully extracted {os.path.basename(downloaded_file_path)} to {download_location}')
+                except tarfile.TarError as e:
+                    logger.error(f'Error extracting {downloaded_file_path}: {e}')
+                except FileNotFoundError:
+                    logger.error(f'File not found: {downloaded_file_path}')
+
+            # Windows - Process .zip files
+            elif downloaded_file_path.lower().endswith('.zip'):
+                try:
+                    with zipfile.ZipFile(downloaded_file_path, 'r') as zip_ref:
+                        zip_ref.extractall(download_location)
+                    logger.info(f'Successfully extracted {os.path.basename(downloaded_file_path)} to {download_location}')
+                except zipfile.BadZipFile as e:
+                    logger.error(f'Error: {downloaded_file_path} is not a valid ZIP file.')
+                except FileNotFoundError:
+                    logger.error(f'File not found: {downloaded_file_path}')
+
+            # macOS - Process .dmg files
+            elif downloaded_file_path.lower().endswith('.dmg'):
+                import dmglib
+                dmg = dmglib.DiskImage(downloaded_file_path)
+                for mount_point in dmg.attach():
+                    try:
+                        # Copy the entire .app bundle to the destination directory
+                        shutil.copytree(os.path.join(mount_point, 'Blender.app'),
+                                        os.path.join(download_location, output_dir_name, 'Blender.app'))
+                        binary_path = os.path.join(download_location, output_dir_name, 'Blender.app')
+                        logger.info(f'Successfully copied {os.path.basename(downloaded_file_path)} to {download_location}')
+                    except FileNotFoundError:
+                        logger.error(f'Error: The source .app bundle does not exist.')
+                    except PermissionError:
+                        logger.error(f'Error: Permission denied to copy {download_location}.')
+                    except Exception as e:
+                        logger.error(f'An error occurred: {e}')
+                dmg.detach()
+
+            else:
+                logger.error("Unknown file. Unable to extract binary.")
+
+        except Exception as e:
+            logger.exception(e)
+
+        # remove downloaded file on completion
+        shutil.rmtree(temp_download_dir)
+        return binary_path
+
+
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+
+    BlenderDownloader.download_engine('3.3.1', download_location="/Users/brett/Desktop/test/releases", system_os='linux', cpu='x64')
+

src/render_queue.py

@@ -5,7 +5,7 @@ from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
 
 from src.utilities.status_utils import RenderStatus
-from src.worker_factory import RenderWorkerFactory
+from src.workers.worker_factory import RenderWorkerFactory
 from src.workers.base_worker import Base
 
 logger = logging.getLogger()
@@ -100,7 +100,7 @@ class RenderQueue:
 
     @classmethod
     def is_available_for_job(cls, renderer, priority=2):
-        if not RenderWorkerFactory.class_for_name(renderer).engine.renderer_path():
+        if not RenderWorkerFactory.class_for_name(renderer).engine.default_renderer_path():
             return False
 
         instances = cls.renderer_instances()

src/utilities/ffmpeg_helper.py

@@ -1,20 +1,20 @@
 import subprocess
-from src.workers.engines.ffmpeg_engine import FFMPEG
+from src.engines.ffmpeg_engine import FFMPEG
 
 
 def image_sequence_to_video(source_glob_pattern, output_path, framerate=24, encoder="prores_ks", profile=4,
                             start_frame=1):
-    subprocess.run([FFMPEG.renderer_path(), "-framerate", str(framerate), "-start_number", str(start_frame), "-i",
+    subprocess.run([FFMPEG.default_renderer_path(), "-framerate", str(framerate), "-start_number", str(start_frame), "-i",
                     f"{source_glob_pattern}", "-c:v", encoder, "-profile:v", str(profile), '-pix_fmt', 'yuva444p10le',
                     output_path], check=True)
 
 
 def save_first_frame(source_path, dest_path, max_width=1280):
-    subprocess.run([FFMPEG.renderer_path(), '-i', source_path, '-vf', f'scale={max_width}:-1',
+    subprocess.run([FFMPEG.default_renderer_path(), '-i', source_path, '-vf', f'scale={max_width}:-1',
                     '-vframes', '1', dest_path], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=True)
 
 
 def generate_thumbnail(source_path, dest_path, max_width=240, fps=12):
-    subprocess.run([FFMPEG.renderer_path(), '-i', source_path, '-vf',
+    subprocess.run([FFMPEG.default_renderer_path(), '-i', source_path, '-vf',
                     f"scale={max_width}:trunc(ow/a/2)*2,format=yuv420p", '-r', str(fps), '-c:v', 'libx264', '-preset',
                     'ultrafast', '-an', dest_path], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=True)

src/workers/aerender_worker.py

@@ -7,7 +7,7 @@ import re
 import time
 
 from src.workers.base_worker import BaseRenderWorker, timecode_to_frames
-from src.workers.engines.aerender_engine import AERender
+from src.engines.aerender_engine import AERender
 
 
 def aerender_path():

src/workers/base_worker.py

@@ -64,7 +64,8 @@ class BaseRenderWorker(Base):
         self.args = args or {}
         self.date_created = datetime.now()
         self.renderer = self.engine.name()
-        self.renderer_version = self.engine.version()
+        self.renderer_version = self.engine().version()
+        self.custom_renderer_path = None
         self.priority = priority
         self.parent = parent
         self.children = {}
@@ -158,7 +159,7 @@ class BaseRenderWorker(Base):
             self.errors.append(msg)
             return
 
-        if not self.engine.renderer_path():
+        if not self.engine.default_renderer_path() and not self.custom_renderer_path:
             self.status = RenderStatus.ERROR
             msg = 'Cannot find render engine path for {}'.format(self.engine.name())
             logger.error(msg)
@@ -167,7 +168,7 @@ class BaseRenderWorker(Base):
 
         self.status = RenderStatus.RUNNING
         self.start_time = datetime.now()
-        logger.info(f'Starting {self.engine.name()} {self.engine.version()} Render for {self.input_path} | '
+        logger.info(f'Starting {self.engine.name()} {self.engine().version()} Render for {self.input_path} | '
                     f'Frame Count: {self.total_frames}')
         self.__thread.start()
 
@@ -182,7 +183,7 @@ class BaseRenderWorker(Base):
 
         with open(self.log_path(), "a") as f:
 
-            f.write(f"{self.start_time.isoformat()} - Starting {self.engine.name()} {self.engine.version()} "
+            f.write(f"{self.start_time.isoformat()} - Starting {self.engine.name()} {self.engine().version()} "
                     f"render for {self.input_path}\n\n")
             f.write(f"Running command: {subprocess_cmds}\n")
             f.write('=' * 80 + '\n\n')

src/workers/blender_worker.py

@@ -2,7 +2,7 @@
 import re
 from collections import Counter
 
-from src.workers.engines.blender_engine import Blender
+from src.engines.blender_engine import Blender
 from src.utilities.ffmpeg_helper import image_sequence_to_video
 from src.workers.base_worker import *
 
@@ -24,7 +24,7 @@ class BlenderRenderWorker(BaseRenderWorker):
         self.__frame_percent_complete = 0.0
 
         # Scene Info
-        self.scene_info = Blender.get_scene_info(input_path)
+        self.scene_info = Blender().get_scene_info(input_path)
         self.start_frame = int(self.scene_info.get('start_frame', 1))
         self.end_frame = int(self.scene_info.get('end_frame', self.start_frame))
         self.project_length = (self.end_frame - self.start_frame) + 1
@@ -32,7 +32,7 @@ class BlenderRenderWorker(BaseRenderWorker):
 
     def generate_worker_subprocess(self):
 
-        cmd = [self.engine.renderer_path()]
+        cmd = [self.engine.default_renderer_path()]
         if self.args.get('background', True):  # optionally run render not in background
             cmd.append('-b')
         cmd.append(self.input_path)

src/workers/ffmpeg_worker.py

@@ -3,7 +3,7 @@ import re
 import subprocess
 
 from src.workers.base_worker import BaseRenderWorker
-from src.workers.engines.ffmpeg_engine import FFMPEG
+from src.engines.ffmpeg_engine import FFMPEG
 
 
 class FFMPEGRenderWorker(BaseRenderWorker):
@@ -14,8 +14,8 @@ class FFMPEGRenderWorker(BaseRenderWorker):
         super(FFMPEGRenderWorker, self).__init__(input_path=input_path, output_path=output_path, args=args,
                                                  parent=parent, name=name)
 
-        stream_info = subprocess.check_output([self.engine.renderer_path(), "-i",  # https://stackoverflow.com/a/61604105
+        stream_info = subprocess.check_output([self.engine.default_renderer_path(), "-i",  # https://stackoverflow.com/a/61604105
-                                                     input_path, "-map", "0:v:0", "-c", "copy", "-f", "null", "-y",
+                                               input_path, "-map", "0:v:0", "-c", "copy", "-f", "null", "-y",
                                                      "/dev/null"], stderr=subprocess.STDOUT).decode('utf-8')
         found_frames = re.findall('frame=\s*(\d+)', stream_info)
         self.project_length = found_frames[-1] if found_frames else '-1'
@@ -23,7 +23,7 @@ class FFMPEGRenderWorker(BaseRenderWorker):
 
     def generate_worker_subprocess(self):
 
-        cmd = [self.engine.renderer_path(), '-y', '-stats', '-i', self.input_path]
+        cmd = [self.engine.default_renderer_path(), '-y', '-stats', '-i', self.input_path]
 
         # Resize frame
         if self.args.get('x_resolution', None) and self.args.get('y_resolution', None):