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moto authored
Summary: This commit changes the way FFmpeg extension is built and used. Instead of linking (LGPL) FFmpeg libraries to torchaudio at build time, It uses dlopen to search and link them at run time. For dlopen-ing, we use PyTorch's `at::DynamicLibrary` class, which provides portable wrapper. Pull Request resolved: https://github.com/pytorch/audio/pull/3353 Differential Revision: D46059199 Pulled By: mthrok fbshipit-source-id: 4493a5fd8a4c802178d20276522f5334d637307d
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