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hwangjeff authored
Summary: With the introduction of the backend dispatcher, importing torchaudio fails when ffmpeg is not available. This PR adds guards to resolve these failures. Pull Request resolved: https://github.com/pytorch/audio/pull/3073 Reviewed By: NivekT, mthrok Differential Revision: D43372870 Pulled By: hwangjeff fbshipit-source-id: 7f6c2795430d7aeb742c2feb97984d5273f20aac
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