.. meta::
  :description: rocDecode Sample Prerequisites
  :keywords: install, rocDecode, AMD, ROCm, samples, prerequisites, dependencies, requirements

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rocDecode samples
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rocDecode samples are available in the `rocDecode GitHub repository <https://github.com/ROCm/rocm-systems/tree/develop/projects/rocdecode/samples>`_.

To run the samples, you'll need to set the ``ROCM_PATH`` to point to the location of your ROCm installation, and set ``LD_PRELOAD`` and ``LIBVA_DRIVERS_PATH`` to point to the ROCm systems libraries and drivers:

.. code:: shell

  export LD_PRELOAD=$ROCM_PATH/lib/rocm_sysdeps/lib/librocm_sysdeps_va.so.2:$ROCM_PATH/lib/rocm_sysdeps/lib/librocm_sysdeps_va-drm.so.2

  export LIBVA_DRIVERS_PATH=$ROCM_PATH/lib/rocm_sysdeps/lib/
 

FFmpeg development libraries must be installed to build and run samples that use FFmpeg for either demultiplexing or decoding:

.. code:: 

  sudo apt install libavcodec-dev libavformat-dev libavutil-dev


You can find a walkthrough of the ``videodecode.cpp`` sample at :doc:`Understanding the videodecode.cpp sample <../how-to/using-rocDecode-videodecode-sample>`.