L4T Multimedia API Reference

27.1 Release

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V4L2 Video Encoder

Detailed Description

NVIDIA Tegra V4L2 Video Encoder Description and Extensions.

The video encoder device node is "/dev/nvhost-msenc".

Supported Pixelformats

OUTPUT PLANE CAPTURE PLANE
V4L2_PIX_FMT_YUV420M V4L2_PIX_FMT_H264
- V4L2_PIX_FMT_H265

Supported Memory Types

MEMORY OUTPUT PLANE CAPTURE PLANE
V4L2_MEMORY_MMAP Y Y
V4L2_MEMORY_DMABUF Y N
V4L2_MEMORY_USERPTR N N
Attention
For the video encoder, it is necessary that the capture plane format be set before the output plane format and only then request buffers on any of the planes.

Supported Controls

The following sections describe the supported controls.

Controls From the Open Source V4L2-Controls Header

Control ID Purpose Runtime Configurable
V4L2_CID_MPEG_VIDEO_BITRATE Bitrate Y
V4L2_CID_MPEG_VIDEO_H264_PROFILE H.264 Encode Profile N
V4L2_CID_MPEG_VIDEO_BITRATE_MODE Rate Control Mode N
V4L2_CID_MPEG_VIDEO_GOP_SIZE I-frame Interval N
V4L2_CID_MPEG_VIDEO_H264_LEVEL Encode Level N
V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE Force I-frame on one of queued output plane buffer Y

All non-runtime configurable options must be set after setting formats on both the planes and before requesting buffers on either plane.

The runtime configurable parameters can be called anytime after setting formats on both the planes.

NVIDIA-Specific Controls

Setting Framerate

The encoder framerate can be set with VIDIOC_S_PARM IOCTL by setting the numerator and denominator in v4l2_streamparm.parm.output.timeperframe.

Supported Encoder Profiles

H.264

H.265

Encoder Output Metadata

The encoder supports reporting frame related metadata, including motion vectors for that frame. See V4L2_CID_MPEG_VIDEOENC_METADATA, V4L2_CID_MPEG_VIDEOENC_METADATA_MV and V4L2_CID_MPEG_VIDEOENC_ENABLE_METADATA_MV for more information.

EOS Handling

The following sequence must be followed for sending EOS and recieving EOS from the encoder.

  1. Send EOS to encoder by queueing on the output plane a buffer with bytesused = 0 for the 0th plane (v4l2_buffer.m.planes[0].bytesused = 0).
  2. Dequeues buffers on the capture plane until it gets a buffer with bytesused = 0 for the 0th plane.
Note
Currently, V4L2 plugins do not support odd resolution.

Data Structures

struct  v4l2_enc_hw_preset_type_param_
 Holds encoder HW Preset type parameters. More...
 
struct  v4l2_enc_slice_length_param_
 Holds encoder slice length parameters, to be used with V4L2_CID_MPEG_VIDEOENC_SLICE_LENGTH_PARAM IOCTL. More...
 
struct  v4l2_enc_virtual_buffer_size_
 Holds encoder virtual buffer size parameters, to be used with V4L2_CID_MPEG_VIDEOENC_VIRTUALBUFFER_SIZE IOCTL. More...
 
struct  v4l2_enc_num_ref_frames_
 Holds encoder number of reference frame parameters, to be used with V4L2_CID_MPEG_VIDEOENC_NUM_REFERENCE_FRAMES IOCTL. More...
 
struct  v4l2_enc_slice_intrarefresh_param_
 Holds encoder slice intrareferesh parameters, to be used with V4L2_CID_MPEG_VIDEOENC_SLICE_INTRAREFRESH_PARAM IOCTL. More...
 
struct  v4l2_enc_ROI_param_
 Holds the encoder quality parameters for a single ROI region. More...
 
struct  v4l2_enc_frame_ROI_params_
 Holds the encoder frame ROI parameters. More...
 
struct  MVInfo_
 Holds the motion vector parameters for a single macro block. More...
 
struct  v4l2_ctrl_videoenc_outputbuf_metadata_MV_
 Holds the motion vector parameters for one complete frame. More...
 
struct  v4l2_enc_frame_full_prop_
 Holds the RPS List parameters of encoded frame. More...
 
struct  v4l2_ctrl_videoenc_outputbuf_metadata_
 Holds the encoder output metadata for a frame, to be used with V4L2_CID_MPEG_VIDEOENC_METADATA IOCTL. More...
 
struct  _v4l2_ctrl_video_metadata
 Holds the metadata parameters for video encoder and decoder. More...
 
struct  v4l2_enc_gdr_params_
 Holds the encoder GDR parameters. More...
 
struct  v4l2_enc_enable_ext_rps_ctrl_
 Holds the params to configure encoder for external rps control. More...
 
struct  _v4l2_enc_frame_prop
 Holds the encoder frame property. More...
 
struct  v4l2_enc_frame_ext_rps_ctrl_params_
 Holds the encoder frame external rps control parameters. More...
 
struct  v4l2_enc_enable_ext_rate_ctrl_
 Holds the params to configure encoder for external rate control mode. More...
 
struct  v4l2_enc_frame_ext_rate_ctrl_params_
 Holds the encoder frame external rate control parameters. More...
 
struct  v4l2_enc_enable_roi_param_
 Holds the params to configure encoder for ROI parameters encoding. More...
 
struct  v4l2_enc_enable_reconcrc_param_
 Holds the params to configure encoder for Reconstructed CRC encoding. More...
 
struct  v4l2_enc_frame_ReconCRC_params_
 Holds the encoder frame Reconstructed CRC parameters. More...
 
struct  v4l2_ctrl_videoenc_input_metadata_
 Holds the encoder frame input metadata parameters. More...
 
struct  _v4l2_ctrl_video_qp_range
 Holds the encoder frame min/max QP parameters. More...
 

Macros

#define V4L2_CID_MPEG_VIDEOENC_TEMPORAL_TRADEOFF_LEVEL   (V4L2_CID_MPEG_BASE+525)
 Control ID to configure encoder to drop frames while encoding. More...
 
#define V4L2_CID_MPEG_VIDEOENC_SLICE_LENGTH_PARAM   (V4L2_CID_MPEG_BASE+526)
 Control ID to configure encoder slice length either in terms of MBs or bits. More...
 
#define V4L2_CID_MPEG_VIDEOENC_ROI_PARAMS   (V4L2_CID_MPEG_BASE+527)
 Control ID to configure encoder to encode particular region of frame in high quality. More...
 
#define V4L2_CID_MPEG_VIDEOENC_VIRTUALBUFFER_SIZE   (V4L2_CID_MPEG_BASE+528)
 Control ID to specify virtual buffer size in bits for encoder. More...
 
#define V4L2_CID_MPEG_VIDEOENC_NUM_REFERENCE_FRAMES   (V4L2_CID_MPEG_BASE+529)
 Control ID to specify maximum number of reference frames that can be used. More...
 
#define V4L2_CID_MPEG_VIDEOENC_SLICE_INTRAREFRESH_PARAM   (V4L2_CID_MPEG_BASE+530)
 Control ID to specify the encoder slice intra refresh interval. More...
 
#define V4L2_CID_MPEG_VIDEOENC_NUM_BFRAMES   (V4L2_CID_MPEG_BASE+531)
 Control ID to set number of B frames to be encoded between two P frames. More...
 
#define V4L2_CID_MPEG_VIDEOENC_INSERT_SPS_PPS_AT_IDR   (V4L2_CID_MPEG_BASE+532)
 Control ID to enable/disable inserting SPS and PPS explicitly at IDR interval. More...
 
#define V4L2_CID_MPEG_VIDEOENC_METADATA   (V4L2_CID_MPEG_BASE+533)
 Control ID to get encoder output metadata. More...
 
#define V4L2_CID_MPEG_VIDEOENC_ENABLE_METADATA_MV   (V4L2_CID_MPEG_BASE+534)
 Control ID to enable/disable encoder motion vector reporting. More...
 
#define V4L2_CID_MPEG_VIDEOENC_METADATA_MV   (V4L2_CID_MPEG_BASE+535)
 Control ID to get encoder output motion vector metadata. More...
 
#define V4L2_CID_MPEG_VIDEOENC_QP_RANGE   (V4L2_CID_MPEG_BASE+536)
 Control ID to set QP range for I/P/B frames. More...
 
#define V4L2_CID_MPEG_VIDEOENC_HW_PRESET_TYPE_PARAM   (V4L2_CID_MPEG_BASE+537)
 Control ID to set encoder HW Preset type. More...
 
#define V4L2_CID_MPEG_VIDEOENC_INPUT_METADATA   (V4L2_CID_MPEG_BASE+538)
 Control ID to provide input metadata for encoder buffer. More...
 
#define V4L2_CID_MPEG_VIDEOENC_ENABLE_EXTERNAL_RPS_CONTROL   (V4L2_CID_MPEG_BASE+539)
 Control ID to configure encoder for external RPS control. More...
 
#define V4L2_CID_MPEG_VIDEOENC_ENABLE_EXTERNAL_RATE_CONTROL   (V4L2_CID_MPEG_BASE+540)
 Control ID to configure encoder for external rate control. More...
 
#define V4L2_CID_MPEG_VIDEOENC_ENABLE_ROI_PARAM   (V4L2_CID_MPEG_BASE+541)
 Control ID to configure ROI encoding for a session. More...
 
#define V4L2_CID_MPEG_VIDEOENC_ENABLE_RECONCRC_PARAM   (V4L2_CID_MPEG_BASE+542)
 Control ID to configure Reconstructed CRC for a session. More...
 
#define V4L2_MAX_ROI_REGIONS   8
 Maximum number of ROI regions supported by the encoder. More...
 
#define V4L2_MAX_REF_FRAMES   8
 Maximum number of reference frames supported by the encoder. More...
 
#define QP_RETAIN_VAL   -1
 Setting Qp values in v4l2_ctrl_video_qp_range to QP_RETAIN_VAL retains default or previously set QP values. More...
 

Typedefs

typedef struct
v4l2_enc_hw_preset_type_param_ 
v4l2_enc_hw_preset_type_param
 Holds encoder HW Preset type parameters. More...
 
typedef struct
v4l2_enc_slice_length_param_ 
v4l2_enc_slice_length_param
 Holds encoder slice length parameters, to be used with V4L2_CID_MPEG_VIDEOENC_SLICE_LENGTH_PARAM IOCTL. More...
 
typedef struct
v4l2_enc_virtual_buffer_size_ 
v4l2_enc_virtual_buffer_size
 Holds encoder virtual buffer size parameters, to be used with V4L2_CID_MPEG_VIDEOENC_VIRTUALBUFFER_SIZE IOCTL. More...
 
typedef struct
v4l2_enc_num_ref_frames_ 
v4l2_enc_num_ref_frames
 Holds encoder number of reference frame parameters, to be used with V4L2_CID_MPEG_VIDEOENC_NUM_REFERENCE_FRAMES IOCTL. More...
 
typedef struct
v4l2_enc_slice_intrarefresh_param_ 
v4l2_enc_slice_intrarefresh_param
 Holds encoder slice intrareferesh parameters, to be used with V4L2_CID_MPEG_VIDEOENC_SLICE_INTRAREFRESH_PARAM IOCTL. More...
 
typedef struct v4l2_enc_ROI_param_ v4l2_enc_ROI_param
 Holds the encoder quality parameters for a single ROI region. More...
 
typedef struct
v4l2_enc_frame_ROI_params_ 
v4l2_enc_frame_ROI_params
 Holds the encoder frame ROI parameters. More...
 
typedef struct MVInfo_ MVInfo
 Holds the motion vector parameters for a single macro block. More...
 
typedef struct
v4l2_ctrl_videoenc_outputbuf_metadata_MV_ 
v4l2_ctrl_videoenc_outputbuf_metadata_MV
 Holds the motion vector parameters for one complete frame. More...
 
typedef struct
v4l2_enc_frame_full_prop_ 
v4l2_enc_frame_full_prop
 Holds the RPS List parameters of encoded frame. More...
 
typedef struct
v4l2_ctrl_videoenc_outputbuf_metadata_ 
v4l2_ctrl_videoenc_outputbuf_metadata
 Holds the encoder output metadata for a frame, to be used with V4L2_CID_MPEG_VIDEOENC_METADATA IOCTL. More...
 
typedef struct
_v4l2_ctrl_video_metadata 
v4l2_ctrl_video_metadata
 Holds the metadata parameters for video encoder and decoder. More...
 
typedef struct v4l2_enc_gdr_params_ v4l2_enc_gdr_params
 Holds the encoder GDR parameters. More...
 
typedef struct
v4l2_enc_enable_ext_rps_ctrl_ 
v4l2_enc_enable_ext_rps_ctr
 Holds the params to configure encoder for external rps control. More...
 
typedef struct _v4l2_enc_frame_prop v4l2_enc_frame_prop
 Holds the encoder frame property. More...
 
typedef struct
v4l2_enc_frame_ext_rps_ctrl_params_ 
v4l2_enc_frame_ext_rps_ctrl_params
 Holds the encoder frame external rps control parameters. More...
 
typedef struct
v4l2_enc_enable_ext_rate_ctrl_ 
v4l2_enc_enable_ext_rate_ctr
 Holds the params to configure encoder for external rate control mode. More...
 
typedef struct
v4l2_enc_frame_ext_rate_ctrl_params_ 
v4l2_enc_frame_ext_rate_ctrl_params
 Holds the encoder frame external rate control parameters. More...
 
typedef struct
v4l2_enc_enable_roi_param_ 
v4l2_enc_enable_roi_param
 Holds the params to configure encoder for ROI parameters encoding. More...
 
typedef struct
v4l2_enc_enable_reconcrc_param_ 
v4l2_enc_enable_reconcrc_param
 Holds the params to configure encoder for Reconstructed CRC encoding. More...
 
typedef struct
v4l2_enc_frame_ReconCRC_params_ 
v4l2_enc_frame_ReconCRC_params
 Holds the encoder frame Reconstructed CRC parameters. More...
 
typedef struct
v4l2_ctrl_videoenc_input_metadata_ 
v4l2_ctrl_videoenc_input_metadata
 Holds the encoder frame input metadata parameters. More...
 
typedef struct
_v4l2_ctrl_video_qp_range 
v4l2_ctrl_video_qp_range
 Holds the encoder frame min/max QP parameters. More...
 

Enumerations

enum  v4l2_enc_temporal_tradeoff_level_type {
  V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROPNONE = 0,
  V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROP1IN5,
  V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROP1IN3,
  V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROP1IN2,
  V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROP2IN3
}
 Enum specifying the types of encoder temporal tradeoff levels. More...
 
enum  v4l2_enc_hw_preset_type {
  V4L2_ENC_HW_PRESET_ULTRAFAST = 1,
  V4L2_ENC_HW_PRESET_FAST,
  V4L2_ENC_HW_PRESET_MEDIUM,
  V4L2_ENC_HW_PRESET_SLOW
}
 Specifies the encoder HW Preset type. More...
 
enum  v4l2_enc_slice_length_type {
  V4L2_ENC_SLICE_LENGTH_TYPE_BITS = 0,
  V4L2_ENC_SLICE_LENGTH_TYPE_MBLK
}
 Enum specifying the type of slice length. More...
 
enum  v4l2_enc_input_metadata_param {
  V4L2_ENC_INPUT_ROI_PARAM_FLAG = 1,
  V4L2_ENC_INPUT_GDR_PARAM_FLAG = 1 << 1,
  V4L2_ENC_INPUT_RPS_PARAM_FLAG = 1 << 2,
  V4L2_ENC_INPUT_RC_PARAM_FLAG = 1 << 3,
  V4L2_ENC_INPUT_RECONCRC_PARAM_FLAG = 1 << 4
}
 Specifies the input buffer metadata flag. More...
 

Macro Definition Documentation

#define QP_RETAIN_VAL   -1

Setting Qp values in v4l2_ctrl_video_qp_range to QP_RETAIN_VAL retains default or previously set QP values.

Definition at line 1462 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_ENABLE_EXTERNAL_RATE_CONTROL   (V4L2_CID_MPEG_BASE+540)

Control ID to configure encoder for external rate control.

A pointer to a valid v4l2_enc_enable_ext_rate_ctr structure must be supplied with this control.

Attention
This control must be set after requesting buffers on both the planes.

Definition at line 870 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_ENABLE_EXTERNAL_RPS_CONTROL   (V4L2_CID_MPEG_BASE+539)

Control ID to configure encoder for external RPS control.

A pointer to a valid v4l2_enc_enable_ext_rps_ctr structure must be supplied with this control.

Attention
This control must be set after requesting buffers on both the planes.

Definition at line 859 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_ENABLE_METADATA_MV   (V4L2_CID_MPEG_BASE+534)

Control ID to enable/disable encoder motion vector reporting.

A boolean value must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 801 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_ENABLE_RECONCRC_PARAM   (V4L2_CID_MPEG_BASE+542)

Control ID to configure Reconstructed CRC for a session.

A pointer to a valid v4l2_enc_enable_reconcrc_param structure must be supplied with this control.

Attention
This control must be set after requesting buffers on both the planes.

Definition at line 892 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_ENABLE_ROI_PARAM   (V4L2_CID_MPEG_BASE+541)

Control ID to configure ROI encoding for a session.

A pointer to a valid v4l2_enc_enable_roi_param structure must be supplied with this control.

Attention
This control must be set after requesting buffers on both the planes.

Definition at line 881 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_HW_PRESET_TYPE_PARAM   (V4L2_CID_MPEG_BASE+537)

Control ID to set encoder HW Preset type.

A pointer to valid v4l2_enc_hw_preset_type_param structure must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 835 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_INPUT_METADATA   (V4L2_CID_MPEG_BASE+538)

Control ID to provide input metadata for encoder buffer.

A pointer to valid v4l2_ctrl_videoenc_input_metadata structure must be supplied with this control.

Attention
This control must be called before queueing a buffer on the output plane. Use the bitwise OR of v4l2_enc_input_metadata_param in the v4l2_ctrl_videoenc_input_metadata.metadata_flag to provide different input metadata parameters in one s_ctrl call.

Definition at line 848 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_INSERT_SPS_PPS_AT_IDR   (V4L2_CID_MPEG_BASE+532)

Control ID to enable/disable inserting SPS and PPS explicitly at IDR interval.

A boolean value must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 779 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_METADATA   (V4L2_CID_MPEG_BASE+533)

Control ID to get encoder output metadata.

A pointer to valid v4l2_ctrl_video_metadata structure must be supplied with this control.

Attention
This control must be read after dequeueing a buffer successfully from the capture plane. The values in the structure are valid until the buffer is queued again.

Definition at line 791 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_METADATA_MV   (V4L2_CID_MPEG_BASE+535)

Control ID to get encoder output motion vector metadata.

A pointer to valid v4l2_ctrl_videoenc_outputbuf_metadata_MV structure must be supplied with this control.

Attention
This control must be read after dequeueing a buffer successfully from the capture plane. The values in the structure are valid until the buffer is queued again.

Definition at line 813 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_NUM_BFRAMES   (V4L2_CID_MPEG_BASE+531)

Control ID to set number of B frames to be encoded between two P frames.

This works only with H.264 encoder. An integer value must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 769 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_NUM_REFERENCE_FRAMES   (V4L2_CID_MPEG_BASE+529)

Control ID to specify maximum number of reference frames that can be used.

An integer value must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 747 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_QP_RANGE   (V4L2_CID_MPEG_BASE+536)

Control ID to set QP range for I/P/B frames.

A pointer to a valid v4l2_ctrl_video_qp_range structure must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 824 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_ROI_PARAMS   (V4L2_CID_MPEG_BASE+527)

Control ID to configure encoder to encode particular region of frame in high quality.

A pointer to a valid v4l2_enc_frame_ROI_params structure must be supplied with this control.

Attention
This control must be set after requesting buffers on both the planes.

Definition at line 726 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_SLICE_INTRAREFRESH_PARAM   (V4L2_CID_MPEG_BASE+530)

Control ID to specify the encoder slice intra refresh interval.

A pointer to a valid v4l2_enc_slice_intrarefresh_param structure must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 758 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_SLICE_LENGTH_PARAM   (V4L2_CID_MPEG_BASE+526)

Control ID to configure encoder slice length either in terms of MBs or bits.

A pointer to a valid v4l2_enc_slice_length_param structure must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 714 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_TEMPORAL_TRADEOFF_LEVEL   (V4L2_CID_MPEG_BASE+525)

Control ID to configure encoder to drop frames while encoding.

A value of type v4l2_enc_temporal_tradeoff_level_type must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 703 of file v4l2_nv_extensions.h.

#define V4L2_CID_MPEG_VIDEOENC_VIRTUALBUFFER_SIZE   (V4L2_CID_MPEG_BASE+528)

Control ID to specify virtual buffer size in bits for encoder.

A pointer to a valid v4l2_enc_virtual_buffer_size structure must be supplied with this control.

Attention
This control must be set after setting formats on both the planes and before requesting buffers on either plane.

Definition at line 737 of file v4l2_nv_extensions.h.

#define V4L2_MAX_REF_FRAMES   8

Maximum number of reference frames supported by the encoder.

Definition at line 1215 of file v4l2_nv_extensions.h.

#define V4L2_MAX_ROI_REGIONS   8

Maximum number of ROI regions supported by the encoder.

Definition at line 1160 of file v4l2_nv_extensions.h.

Typedef Documentation

typedef struct MVInfo_ MVInfo

Holds the motion vector parameters for a single macro block.

Holds the metadata parameters for video encoder and decoder.

The metadata is valid for the buffer with index buffer_index after the buffer is dequeued until it is queued again.

Holds the encoder frame min/max QP parameters.

Must be used with V4L2_CID_MPEG_VIDEOENC_QP_RANGE IOCTL.

Holds the encoder frame input metadata parameters.

Must be used with V4L2_CID_MPEG_VIDEOENC_INPUT_METADATA IOCTL.

Holds the encoder output metadata for a frame, to be used with V4L2_CID_MPEG_VIDEOENC_METADATA IOCTL.

Holds the motion vector parameters for one complete frame.

Holds the params to configure encoder for external rate control mode.

Must be used with V4L2_CID_MPEG_VIDEOENC_ENABLE_EXTERNAL_RATE_CONTROL IOCTL.

Holds the params to configure encoder for external rps control.

Must be used with V4L2_CID_MPEG_VIDEOENC_ENABLE_EXTERNAL_RPS_CONTROL IOCTL.

Holds the params to configure encoder for Reconstructed CRC encoding.

Must be used with V4L2_CID_MPEG_VIDEOENC_ENABLE_RECONCRC_PARAM IOCTL.

Holds the params to configure encoder for ROI parameters encoding.

Must be used with V4L2_CID_MPEG_VIDEOENC_ENABLE_ROI_PARAM IOCTL.

Holds the encoder frame external rate control parameters.

Must be used with V4L2_CID_MPEG_VIDEOENC_INPUT_METADATA IOCTL.

Holds the encoder frame external rps control parameters.

Must be used with V4L2_CID_MPEG_VIDEOENC_INPUT_METADATA IOCTL.

Holds the RPS List parameters of encoded frame.

Holds the encoder frame property.

Holds the encoder frame Reconstructed CRC parameters.

Must be used with V4L2_CID_MPEG_VIDEOENC_INPUT_METADATA IOCTL.

Holds the encoder frame ROI parameters.

Must be used with V4L2_CID_MPEG_VIDEOENC_ROI_PARAMS IOCTL.

Holds the encoder GDR parameters.

Must be used with V4L2_CID_MPEG_VIDEOENC_INPUT_METADATA IOCTL.

Holds encoder HW Preset type parameters.

To be used with V4L2_CID_MPEG_VIDEOENC_HW_PRESET_TYPE_PARAM IOCTL.

Holds encoder number of reference frame parameters, to be used with V4L2_CID_MPEG_VIDEOENC_NUM_REFERENCE_FRAMES IOCTL.

This is not supported for H.265.

Holds the encoder quality parameters for a single ROI region.

Holds encoder slice intrareferesh parameters, to be used with V4L2_CID_MPEG_VIDEOENC_SLICE_INTRAREFRESH_PARAM IOCTL.

Holds encoder slice length parameters, to be used with V4L2_CID_MPEG_VIDEOENC_SLICE_LENGTH_PARAM IOCTL.

Holds encoder virtual buffer size parameters, to be used with V4L2_CID_MPEG_VIDEOENC_VIRTUALBUFFER_SIZE IOCTL.

Enumeration Type Documentation

Specifies the encoder HW Preset type.

Enumerator
V4L2_ENC_HW_PRESET_ULTRAFAST 

Encoder HWPreset with per frame encode time UltraFast.

V4L2_ENC_HW_PRESET_FAST 

Encoder HWPreset with per frame encode time Fast.

V4L2_ENC_HW_PRESET_MEDIUM 

Encoder HWPreset with per frame encode time Medium.

V4L2_ENC_HW_PRESET_SLOW 

Encoder HWPreset with per frame encode time Slow.

Definition at line 1063 of file v4l2_nv_extensions.h.

Specifies the input buffer metadata flag.

Enumerator
V4L2_ENC_INPUT_ROI_PARAM_FLAG 

Input metadata structure contains ROI parameters.

V4L2_ENC_INPUT_GDR_PARAM_FLAG 

Input metadata structure contains GDR parameters.

V4L2_ENC_INPUT_RPS_PARAM_FLAG 

Input metadata structure contains External RPS parameters.

V4L2_ENC_INPUT_RC_PARAM_FLAG 

Input metadata structure contains External RC parameters.

V4L2_ENC_INPUT_RECONCRC_PARAM_FLAG 

Input metadata structure contains ReconCRC parameters.

Definition at line 1100 of file v4l2_nv_extensions.h.

Enum specifying the type of slice length.

Enumerator
V4L2_ENC_SLICE_LENGTH_TYPE_BITS 

Slice size is specified in terms of number of bytes.

V4L2_ENC_SLICE_LENGTH_TYPE_MBLK 

Slice size is specified in terms of number of macroblocks.

Definition at line 1090 of file v4l2_nv_extensions.h.

Enum specifying the types of encoder temporal tradeoff levels.

Enumerator
V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROPNONE 

Do not drop any buffers.

V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROP1IN5 

Drop 1 in every 5 buffers.

V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROP1IN3 

Drop 1 in every 3 buffers.

V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROP1IN2 

Drop 1 in every 2 buffers.

V4L2_ENC_TEMPORAL_TRADEOFF_LEVEL_DROP2IN3 

Drop 2 in every 3 buffers.

Definition at line 1047 of file v4l2_nv_extensions.h.