===== Application Startup at 2026-04-30 20:39:02 =====
INFO: Started server process [1] INFO: Waiting for application startup. INFO: Application startup complete. INFO: Uvicorn running on http://0.0.0.0:7860 (Press CTRL+C to quit) INFO: 10.16.29.229:48249 - "GET / HTTP/1.1" 200 OK INFO: 10.16.29.229:48249 - "GET /style.css HTTP/1.1" 200 OK INFO: 10.16.27.106:43311 - "GET /app.js HTTP/1.1" 200 OK INFO: 10.16.1.210:19952 - "GET / HTTP/1.1" 200 OK INFO: 10.16.27.106:32925 - "GET / HTTP/1.1" 200 OK INFO: 10.16.1.210:19952 - "GET /app.js HTTP/1.1" 200 OK INFO: 10.16.12.5:48186 - "GET /style.css HTTP/1.1" 200 OK INFO: 10.16.29.229:21750 - "GET / HTTP/1.1" 304 Not Modified INFO: 10.16.12.5:9327 - "GET /style.css HTTP/1.1" 304 Not Modified INFO: 10.16.42.153:28833 - "GET /app.js HTTP/1.1" 304 Not Modified Selected model is a bag of 4 models. You will see that many progress bars per track. Separated tracks will be stored in /app/separated/mdx_extra Separating track backend/uploads/95de5fce-3cb8-4cc9-b15b-66625179b0ac.mp3 Could not load file backend/uploads/95de5fce-3cb8-4cc9-b15b-66625179b0ac.mp3. Maybe it is not a supported file format? When trying to load using ffmpeg, got the following error: FFmpeg is not installed. When trying to load using torchaudio, got the following error: Could not load libtorchcodec. Likely causes: 1. FFmpeg is not properly installed in your environment. We support versions 4, 5, 6, 7, and 8, and we attempt to load libtorchcodec for each of those versions. Errors for versions not installed on your system are expected; only the error for your installed FFmpeg version is relevant. On Windows, ensure you've installed the "full-shared" version which ships DLLs. 2. The PyTorch version (2.11.0+cu130) is not compatible with this version of TorchCodec. Refer to the version compatibility table: https://github.com/pytorch/torchcodec?tab=readme-ov-file#installing-torchcodec. 3. Another runtime dependency; see exceptions below.
The following exceptions were raised as we tried to load libtorchcodec:
[start of libtorchcodec loading traceback] FFmpeg version 8: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.60: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core8.so
FFmpeg version 7: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.59: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core7.so
FFmpeg version 6: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.58: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core6.so
FFmpeg version 5: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.57: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core5.so
FFmpeg version 4: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.56: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core4.so [end of libtorchcodec loading traceback]. INFO: 10.16.1.210:41571 - "POST /upload HTTP/1.1" 500 Internal Server Error ERROR: Exception in ASGI application Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/uvicorn/protocols/http/h11_impl.py", line 415, in run_asgi result = await app( # type: ignore[func-returns-value] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/uvicorn/middleware/proxy_headers.py", line 56, in call return await self.app(scope, receive, send) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/fastapi/applications.py", line 1159, in call await super().call(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/applications.py", line 90, in call await self.middleware_stack(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/middleware/errors.py", line 186, in call raise exc File "/usr/local/lib/python3.11/site-packages/starlette/middleware/errors.py", line 164, in call await self.app(scope, receive, _send) File "/usr/local/lib/python3.11/site-packages/starlette/middleware/cors.py", line 96, in call await self.simple_response(scope, receive, send, request_headers=headers) File "/usr/local/lib/python3.11/site-packages/starlette/middleware/cors.py", line 154, in simple_response await self.app(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/middleware/exceptions.py", line 63, in call await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app raise exc File "/usr/local/lib/python3.11/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app await app(scope, receive, sender) File "/usr/local/lib/python3.11/site-packages/fastapi/middleware/asyncexitstack.py", line 18, in call await self.app(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/routing.py", line 660, in call await self.middleware_stack(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/routing.py", line 680, in app await route.handle(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/routing.py", line 276, in handle await self.app(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/fastapi/routing.py", line 134, in app await wrap_app_handling_exceptions(app, request)(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app raise exc File "/usr/local/lib/python3.11/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app await app(scope, receive, sender) File "/usr/local/lib/python3.11/site-packages/fastapi/routing.py", line 120, in app response = await f(request) ^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/fastapi/routing.py", line 674, in app raw_response = await run_endpoint_function( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/fastapi/routing.py", line 328, in run_endpoint_function return await dependant.call(**values) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/app/backend/main.py", line 33, in upload_audio output_path = run_demucs(save_path) ^^^^^^^^^^^^^^^^^^^^^ File "/app/backend/demucs_runner.py", line 6, in run_demucs subprocess.run( File "/usr/local/lib/python3.11/subprocess.py", line 571, in run raise CalledProcessError(retcode, process.args, subprocess.CalledProcessError: Command '['demucs', '--two-stems=vocals', '-n', 'mdx_extra', 'backend/uploads/95de5fce-3cb8-4cc9-b15b-66625179b0ac.mp3']' returned non-zero exit status 1. Selected model is a bag of 4 models. You will see that many progress bars per track. Separated tracks will be stored in /app/separated/mdx_extra Separating track backend/uploads/1790a01f-024d-49ec-be3a-8ce76c16601a.mp3 Could not load file backend/uploads/1790a01f-024d-49ec-be3a-8ce76c16601a.mp3. Maybe it is not a supported file format? When trying to load using ffmpeg, got the following error: FFmpeg is not installed. When trying to load using torchaudio, got the following error: Could not load libtorchcodec. Likely causes: 1. FFmpeg is not properly installed in your environment. We support versions 4, 5, 6, 7, and 8, and we attempt to load libtorchcodec for each of those versions. Errors for versions not installed on your system are expected; only the error for your installed FFmpeg version is relevant. On Windows, ensure you've installed the "full-shared" version which ships DLLs. 2. The PyTorch version (2.11.0+cu130) is not compatible with this version of TorchCodec. Refer to the version compatibility table: https://github.com/pytorch/torchcodec?tab=readme-ov-file#installing-torchcodec. 3. Another runtime dependency; see exceptions below.
The following exceptions were raised as we tried to load libtorchcodec:
[start of libtorchcodec loading traceback] FFmpeg version 8: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.60: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core8.so
FFmpeg version 7: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.59: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core7.so
FFmpeg version 6: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.58: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core6.so
FFmpeg version 5: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.57: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core5.so
FFmpeg version 4: Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1503, in load_library ctypes.CDLL(path) File "/usr/local/lib/python3.11/ctypes/init.py", line 376, in init self._handle = _dlopen(self._name, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: libavutil.so.56: cannot open shared object file: No such file or directory
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torchcodec/_internally_replaced_utils.py", line 93, in load_torchcodec_shared_libraries torch.ops.load_library(core_library_path) File "/usr/local/lib/python3.11/site-packages/torch/_ops.py", line 1505, in load_library raise OSError(f"Could not load this library: {path}") from e OSError: Could not load this library: /usr/local/lib/python3.11/site-packages/torchcodec/libtorchcodec_core4.so [end of libtorchcodec loading traceback]. INFO: 10.16.12.5:6739 - "POST /upload HTTP/1.1" 500 Internal Server Error ERROR: Exception in ASGI application Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/uvicorn/protocols/http/h11_impl.py", line 415, in run_asgi result = await app( # type: ignore[func-returns-value] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/uvicorn/middleware/proxy_headers.py", line 56, in call return await self.app(scope, receive, send) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/fastapi/applications.py", line 1159, in call await super().call(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/applications.py", line 90, in call await self.middleware_stack(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/middleware/errors.py", line 186, in call raise exc File "/usr/local/lib/python3.11/site-packages/starlette/middleware/errors.py", line 164, in call await self.app(scope, receive, _send) File "/usr/local/lib/python3.11/site-packages/starlette/middleware/cors.py", line 96, in call await self.simple_response(scope, receive, send, request_headers=headers) File "/usr/local/lib/python3.11/site-packages/starlette/middleware/cors.py", line 154, in simple_response await self.app(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/middleware/exceptions.py", line 63, in call await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app raise exc File "/usr/local/lib/python3.11/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app await app(scope, receive, sender) File "/usr/local/lib/python3.11/site-packages/fastapi/middleware/asyncexitstack.py", line 18, in call await self.app(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/routing.py", line 660, in call await self.middleware_stack(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/routing.py", line 680, in app await route.handle(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/routing.py", line 276, in handle await self.app(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/fastapi/routing.py", line 134, in app await wrap_app_handling_exceptions(app, request)(scope, receive, send) File "/usr/local/lib/python3.11/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app raise exc File "/usr/local/lib/python3.11/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app await app(scope, receive, sender) File "/usr/local/lib/python3.11/site-packages/fastapi/routing.py", line 120, in app response = await f(request) ^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/fastapi/routing.py", line 674, in app raw_response = await run_endpoint_function( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/fastapi/routing.py", line 328, in run_endpoint_function return await dependant.call(**values) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/app/backend/main.py", line 33, in upload_audio output_path = run_demucs(save_path) ^^^^^^^^^^^^^^^^^^^^^ File "/app/backend/demucs_runner.py", line 6, in run_demucs subprocess.run( File "/usr/local/lib/python3.11/subprocess.py", line 571, in run raise CalledProcessError(retcode, process.args, subprocess.CalledProcessError: Command '['demucs', '--two-stems=vocals', '-n', 'mdx_extra', 'backend/uploads/1790a01f-024d-49ec-be3a-8ce76c16601a.mp3']' returned non-zero exit status 1. INFO: 10.16.29.229:14043 - "GET / HTTP/1.1" 304 Not Modified INFO: 10.16.27.106:61337 - "GET / HTTP/1.1" 200 OK INFO: 10.16.12.5:29961 - "GET /app.js HTTP/1.1" 304 Not Modified INFO: 10.16.42.153:39129 - "GET /style.css HTTP/1.1" 304 Not Modified