The batch and metadata info will clean after tiler plugin, so when you want to get some info from the osd plugin, it maybe get wrong values.
About your needs, we suggest you run one stream at a time. Or you can try to use nvstreamdemux to separate the stream.
https://docs.nvidia.com/metropolis/deepstream/dev-guide/text/DS_plugin_gst-nvstreamdemux.html
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