fix: disable MPS device selection for ctranslate2 compatibility#3
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randroid88 wants to merge 2 commits into
Open
fix: disable MPS device selection for ctranslate2 compatibility#3randroid88 wants to merge 2 commits into
randroid88 wants to merge 2 commits into
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ctranslate2 and faster-whisper only support CUDA and CPU backends. On Apple Silicon Macs, selecting MPS causes a runtime crash during transcription. Skip MPS and fall back to CPU instead.
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Summary
get_optimal_device()— ctranslate2 and faster-whisper only support CUDA and CPU backendsDetails
ctranslate2(used byfaster-whisper, which powers WhisperX) does not support Apple's Metal Performance Shaders backend. Whenget_optimal_device()returnstorch.device("mps"), the transcription pipeline crashes with an unsupported device error.This removes the MPS branch and adds a comment explaining why it's intentionally skipped.
Files changed
backend/utils/gpu_utils.py— Remove MPS device selection inget_optimal_device()Test plan