MASTER THESIS Video Watermarking - Computer Graphics Group ...

Appendix B
The plugin usage
The watermarking plugin can be used as an element queued in a GStreamer
pipeline. The construction of the pipelines is described in the documentation on
the project's website [12]. The name of the plugin is h264watermark.
The plugin behaviour is controlled by several parameters. The list of the
parameters follows:
mode specifies the working mode of the plugin. Three values may be assigned:
prepare (everything except parameter set NAL units and intra coded slices is
dropped), embed (activates the embedding process) and detect (activates the
detection process).
method selects the watermarking method: block, coeff (stands for coefficient)
and noise.
weight sets the weight factor.
content-id stands for the identifier of the video content.
copy-id is the identifier of the content copy.
It is possible to obtain the parameter list by using one of GStreamer utilities
as well – type:
gst-inspect h264watermark
There are three scripts, containing complete GStreamer pipelines, provided
on the enclosed CD – embed, detect and prepare – using the plugin in the
corresponding mode. The required arguments are listed if the scripts are
executed without any arguments. The first two arguments stand for the input
and the output files. Only Matroska muxed video sequences are accepted. The
other arguments represent the plugin parameters.
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