I think I have answered my own question.<br><br>I found this code in aravis/gst/gstaravis.c<br><br>    gs = gst_structure_empty_new (&quot;video&quot;);<br>    gst_structure_set_name (gs, &quot;video/x-raw-gray&quot;);<br>
    gst_structure_set (gs,<br>               &quot;bpp&quot;, G_TYPE_INT, 8,<br>               &quot;depth&quot;, G_TYPE_INT, 8,<br>               &quot;width&quot;, G_TYPE_INT, width,<br>               &quot;height&quot;, G_TYPE_INT, height,<br>
               NULL);<br><br>I looked elsewhere for subsequent modifications, but did not find any.<br><br>From this I concluded that aravis only supports 8-bit gray.<br><br>Thanks,<br>Bert Douglas<br>