Hi Hiro, There is an existing API called vaQueryProcessingRate(), which returns the number of macroblocks per second for a given configuration (which can then be used to map to levels). You can take a look to see if it works for you. Jonathan -----Original Message----- From: intel-vaapi-media <intel-vaapi-media-bounces(a)lists.01.org&gt; On Behalf Of Hirokazu Honda Sent: Sunday, December 16, 2018 5:28 PM To: intel-vaapi-media(a)lists.01.org Subject: [intel-vaapi-media] The way of Querying level for video encoding Hi, I am wondering how to query which level a libva based driver supports on video encoding. For example, when I want to know a driver supports H264 level 4.2, how do I know whether or not the driver does. Ideally, there should be the vaQuery... API for it. However, as far as look VA-API document and gstreamer-vaapi, seems like there is no API like that. Is there any API for it? If no, I think we should add an API for the purpose. Thanks, -Hiro _______________________________________________ intel-vaapi-media mailing list intel-vaapi-media(a)lists.01.org https://lists.01.org/mailman/listinfo/intel-vaapi-media