..  _demo_video_generation:

Video Generation
=====================

To generate video files, the shell script ``generate_video.sh`` can be utilized. It is is located in

.. code-block:: bash

    $prefix/bin


Certain environment variables have to be set before the script can be used: ``source-env.sh``

.. code-block:: bash
    
    source $prefix/bin/source-env.sh


``generate-videos.sh -h`` shows how to use the script.

.. code-block:: bash

    usage: generate-videos.sh [-h] [-i infolder] [-o outfolder] [-a audiocam] [-v videocams] [-p prefix]

    where:
        -h  show this help text
        -i  input folder for video (h264) and audio (flac) files          (default: /tmp/)
        -o  output folder for combined video (mp4) and intermediate files (default: /tmp/)
        -a  one camera that recorded the audio track                      (default: 2)
        -v  video-only cameras                                            (default: 134)
        -p  file globbing prefix                                          (default: VP)


Set the path for ``LD_LIBRARY`` and start the shell script ``generate_video.sh``.

Example
--------

.. code-block:: bash

    LD_LIBRARY_PATH=$prefix/lib/ generate-videos.sh -i recordings/ -o gen/ -a 1 -v 1234 -p c

Please use for the output folder a separate folder, e.g. `gen/`.