add missing ctranslate2 libcublas dep

Author: boxerab

pyproject.toml

@@ -36,6 +36,13 @@ dependencies = [
 [project.optional-dependencies]
 whisper = [
     "whisper-live>=0.9.0",
+    # CTranslate2 (faster-whisper's backend) loads CUDA via the system
+    # dynamic loader and can't find torch's bundled copies under
+    # site-packages/nvidia/. These wheels install the libraries in a
+    # location CTranslate2 actually searches; without them GPU inference
+    # dies with "Library libcublas.so.12 is not found".
+    "nvidia-cublas-cu12; sys_platform == 'linux'",
+    "nvidia-cudnn-cu12; sys_platform == 'linux'",
 ]
 dev = [
     "pytest>=8.0",

requirements/whisper.txt

@@ -10,3 +10,13 @@ torchaudio
 faster-whisper>=1.2
 websockets
 scipy
+
+# CUDA runtime libraries needed by CTranslate2 (faster-whisper's backend).
+# torch bundles its own copies under site-packages/nvidia/, but CTranslate2
+# uses the system dynamic loader and can't find them there. Without these
+# wheels you get at transcription time:
+#   ERROR: Failed to transcribe audio chunk:
+#   Library libcublas.so.12 is not found or cannot be loaded
+# Skip these only if you're forcing CPU inference (compute_type=int8 on CPU).
+nvidia-cublas-cu12
+nvidia-cudnn-cu12