Hi,
I find that H.265 encoder disabled the deblocking_filter when using preset MEDIUM and SLOW on Xavier NX, the pps_deblocking_filter_disabled_flag was set to 1, and there’s a lot of Mosaic on the encoded stream, my test nvidia-l4t-jetson-multimedia-api is 32.5.0-20210115151051.
However, the pps_deblocking_filter_disabled_flag was set to 0 when using preset ULTRAFAST and FAST.
Moreover, all the presets set the pps_deblocking_filter_disabled_flag to 0 on Jetson Nano with the nvidia-l4t-jetson-multimedia-api is 32.5.0-20210115145440.
The preset level is for tradeoff between quality and performance. The setting of filters is different. You may choose the setting fitting your requirement.