vacompositor#

Using the GStreamer framework vacompositor element for merging many video displays into a single view#

The GStreamer framework vacompositor element allows for merging multiple displays into one.

Add the vacompositor element along with its name e.g. name=comp and the sink pad x,y coordinates, e.g. sink_0::xpos=0 sink_0::ypos=0 to GStreamer framework pipeline. Each output display requires a separate sink pad definition. The last component is autovideosink sync=false.

vacompositor name=comp sink_0::xpos=0 sink_0::ypos=0 sink_1::xpos=645 sink_1::ypos=0 ... ! autovideosink sync=false

The example below presents usage of the GStreamer framework vacompositor element for merging 4 output videos into a single display.

gst-launch-1.0 vacompositor name=comp  sink_0::xpos=0 sink_0::ypos=0 sink_1::xpos=645 sink_1::ypos=0 sink_2::xpos=0 sink_2::ypos=365 sink_3::xpos=645 sink_3::ypos=365 ! autovideosink sync=false \
filesrc location=${VIDEO_FILE_1} ! decodebin3 ! \
    gvadetect model=${MODEL_FILE} device=GPU pre-process-backend=va model-instance-id=inf0 batch-size=4 ! queue ! gvawatermark ! gvafpscounter ! comp.sink_0  \
filesrc location=${VIDEO_FILE_2} ! decodebin3 ! \
    gvadetect model=${MODEL_FILE} device=GPU pre-process-backend=va model-instance-id=inf0 batch-size=4 ! queue ! gvawatermark ! gvafpscounter ! comp.sink_1 \
filesrc location=${VIDEO_FILE_3} ! decodebin3 ! \
    gvadetect model=${MODEL_FILE} device=GPU pre-process-backend=va model-instance-id=inf0 batch-size=4 ! queue ! gvawatermark ! gvafpscounter ! comp.sink_2 \
filesrc location=${VIDEO_FILE_4} ! decodebin3 ! \
    gvadetect model=${MODEL_FILE} device=GPU pre-process-backend=va model-instance-id=inf0 batch-size=4 ! queue ! gvawatermark ! gvafpscounter ! comp.sink_3

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