NVIDIA V4L2 H.265 Encoder plugin Gstreamer interface

  name                : The name of the object
                        flags: readable, writable
                        String. Default: "nvv4l2h265enc0"
  parent              : The parent of the object
                        flags: readable, writable
                        Object of type "GstObject"
  qos                 : Handle Quality-of-Service events from downstream
                        flags: readable, writable
                        Boolean. Default: false
  device              : Device location
                        flags: readable
                        String. Default: "/dev/nvhost-msenc"
  device-name         : Name of the device
                        flags: Opening in BLOCKING MODE 
readable
                        String. Default: ""
  device-fd           : File descriptor of the device
                        flags: readable
                        Integer. Range: -1 - 2147483647 Default: -1 
  output-io-mode      : Output side I/O mode (matches sink pad)
                        flags: readable, writable
                        Enum "GstNvV4l2EncOutputIOMode" Default: 0, "auto"
                           (0): auto             - GST_V4L2_IO_AUTO
                           (2): mmap             - GST_V4L2_IO_MMAP
                           (5): dmabuf-import    - GST_V4L2_IO_DMABUF_IMPORT
  capture-io-mode     : Capture I/O mode (matches src pad)
                        flags: readable, writable
                        Enum "GstNvV4l2EncCaptureIOMode" Default: 0, "auto"
                           (0): auto             - GST_V4L2_IO_AUTO
                           (2): mmap             - GST_V4L2_IO_MMAP
  extra-controls      : Extra v4l2 controls (CIDs) for the device
                        flags: readable, writable
                        Boxed pointer of type "GstStructure"
  bitrate             : Set bitrate for v4l2 encode
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 4000000 
  control-rate        : Set control rate for v4l2 encode
                        flags: readable, writable, changeable only in NULL or READY state
                        Enum "GstV4l2VideoEncRateControlType" Default: 1, "constant_bitrate"
                           (0): variable_bitrate - GST_V4L2_VIDENC_VARIABLE_BITRATE
                           (1): constant_bitrate - GST_V4L2_VIDENC_CONSTANT_BITRATE
  iframeinterval      : Encoding Intra Frame occurance frequency
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 30 
  bufapi-version      : Set to use new buf API
                        flags: readable, writable
                        Boolean. Default: false
  peak-bitrate        : Peak bitrate in variable control-rate
			 The value must be >= bitrate
			 (1.2*bitrate) is set by default(Default: 0)
                        flags: readable, writable, changeable in NULL, READY, PAUSED or PLAYING state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 0 
  quant-i-frames      : Quantization parameter for I-frames (0xffffffff=component default),
			 use with ratecontrol-enable = 0
			 and preset-level = 0
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295 
  quant-p-frames      : Quantization parameter for P-frames (0xffffffff=component default),
			 use with ratecontrol-enable = 0
			 and preset-level = 0
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295 
  quant-b-frames      : Quantization parameter for B-frames (0xffffffff=component default),
			 use with ratecontrol-enable = 0
			 and preset-level = 0
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295 
  preset-level        : HW preset level for encoder
                        flags: readable, writable, changeable only in NULL or READY state
                        Enum "GstV4L2VideoEncHwPreset" Default: 1, "UltraFastPreset"
                           (0): DisablePreset    - Disable HW-Preset
                           (1): UltraFastPreset  - UltraFastPreset for high perf
                           (2): FastPreset       - FastPreset
                           (3): MediumPreset     - MediumPreset
                           (4): SlowPreset       - SlowPreset
  qp-range            : Qunatization range for P, I and B frame,
			 Use string with values of Qunatization Range 
			 in MinQpP-MaxQpP:MinQpI-MaxQpI:MinQpB-MaxQpB order, to set the property.
                        flags: readable, writable
                        String. Default: null
  vbv-size            : virtual buffer size 
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 4000000 
  MeasureEncoderLatency: Enable Measure Encoder latency Per Frame
                        flags: readable, writable, changeable only in NULL or READY state
                        Boolean. Default: false
  ratecontrol-enable  : Enable or Disable rate control mode
                        flags: readable, writable, changeable only in NULL or READY state
                        Boolean. Default: true
  maxperf-enable      : Enable or Disable Max Performance mode
                        flags: readable, writable, changeable only in NULL or READY state
                        Boolean. Default: false
  idrinterval         : Encoding IDR Frame occurance frequency
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 256 
  insert-sps-pps      : Insert H.265 SPS, PPS at every IDR frame
                        flags: readable, writable
                        Boolean. Default: false
  profile             : Set profile for v4l2 encode
                        flags: readable, writable, changeable only in NULL or READY state
                        Enum "GstV4L2VideoEncProfileType" Default: 0, "Main"
                           (0): Main             - GST_V4L2_H265_VIDENC_MAIN_PROFILE
                           (1): Main10           - GST_V4L2_H265_VIDENC_MAIN10_PROFILE
  insert-vui          : Insert H.265 VUI(Video Usability Information) in SPS
                        flags: readable, writable
                        Boolean. Default: false
  insert-aud          : Insert H.265 Access Unit Delimiter(AUD)
                        flags: readable, writable
                        Boolean. Default: false
  bit-packetization   : Whether or not Packet size is based upon Number Of bits
                        flags: readable, writable, changeable only in NULL or READY state
                        Boolean. Default: false
  slice-header-spacing: Slice Header Spacing number of macroblocks/bits in one packet
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0 
  SliceIntraRefreshInterval: Set SliceIntraRefreshInterval
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 0 
  EnableTwopassCBR    : Enable two pass CBR while encoding
                        flags: readable, writable, changeable only in NULL or READY state
                        Boolean. Default: false
  EnableMVBufferMeta  : Enable Motion Vector Meta data for encoding
                        flags: readable, writable, changeable only in NULL or READY state
                        Boolean. Default: false
  num-B-Frames        : Number of B Frames between two reference frames (not recommended)(Supported only on Xavier)
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 2 Default: 0 
  num-Ref-Frames      : Number of Reference Frames for encoder
                        flags: readable, writable, changeable only in NULL or READY state
                        Unsigned Integer. Range: 0 - 8 Default: 1 
  enable-lossless     : Enable lossless encoding for YUV444
                        flags: readable, writable, changeable only in NULL or READY state
                        Boolean. Default: false