camera_h264avc_parameters

The list of supported video encoder parameters for H.264/AVC

Synopsis:

typedef enum {
    CAMERA_H264AVC_BITRATE = 0,
    CAMERA_H264AVC_KEYFRAMEINTERVAL,
    CAMERA_H264AVC_SLICETYPE,
    CAMERA_H264AVC_SLICESIZE,
    CAMERA_H264AVC_PROFILE,
    CAMERA_H264AVC_LEVEL,
    CAMERA_H264AVC_ENTROPYCODING,
    CAMERA_H264AVC_RATECONTROL,
    CAMERA_H264AVC_QPI,
    CAMERA_H264AVC_QPP,
    CAMERA_H264AVC_NUMPARAMETERS
} camera_h264avc_parameters_t;

Data:

CAMERA_H264AVC_BITRATE

The target bitrate or target average bitrate.

When the CAMERA_H264AVC_RATECONTROL parameter is set to CAMERA_H264AVC_RATECONTROL_CBR, this parameter represents the target bitrate of the encoded video.
When CAMERA_H264AVC_RATECONTROL parameter is set to CAMERA_H264AVC_RATECONTROL_VBR, this parameter represents the target average bitrate of the encoded video
When CAMERA_H264AVC_RATECONTROL parameter is set to CAMERA_H264AVC_RATECONTROL_NONE, this parameter is ignored.The units are in bits per second as an unsigned int value.

CAMERA_H264AVC_KEYFRAMEINTERVAL

The interval (in frames) between the generation of each keyframe as an unsigned int value.

CAMERA_H264AVC_SLICETYPE

The algorithm used to generate NAL slices.

The value must be set to a value from the camera_h264avc_slicetype_t enumerated type. This parameter can only be modified before you start to encode video.

CAMERA_H264AVC_SLICESIZE

The slice size as an unsigned int value.

Depending on the value you configured for CAMERA_H264AVC_SLICETYPE, the slice size is interpreted as follows:

CAMERA_H264AVC_SLICE_FRAME: The slice size is ignored.
CAMERA_H264AVC_SLICE_BYTES: The slice size represents the size of the slice in bytes.
CAMERA_H264AVC_SLICE_MACROBLOCKS: The slice size represents the size as a number of macroblocks. On some devices, this parameter can only be modified before you start encoding video.

CAMERA_H264AVC_PROFILE

The profile used to encode the video.

The value must be set to a value from camera_h264avc_profile_t. You can only modify this parameter before you start encoding video.

CAMERA_H264AVC_LEVEL

The level used to encode the video.

The value must be set to a value from camera_h264avc_level_t. You can only modify this parameter before you start encoding video.

CAMERA_H264AVC_ENTROPYCODING

The entropy coding method to use.

The value must be set to a value from camera_h264avc_entropycoding_t. You can only modify this parameter before you start encoding video.

CAMERA_H264AVC_RATECONTROL

The rate control method used for the encoding.

The value must be set to a value from camera_h264avc_ratecontrol_t. You can only modify this parameter before you start encoding video.

CAMERA_H264AVC_QPI

The Quantization Parameter (QP) that is used to encode key (I) frames when the CAMERA_H264AVC_RATECONTROL parameter is set to CAMERA_H264AVC_RATECONTROL_NONE.

For other rate control methods, this parameter has no impact. The value being set is an unsigned int value.

CAMERA_H264AVC_QPP

The Quantization Parameter (QP) that is used to encode inter (P) frames when the CAMERA_H264AVC_RATECONTROL parameter is set to CAMERA_H264AVC_RATECONTROL_NONE.

For other rate control methods, this parameter has no impact. The value being set is an unsigned int value.

CAMERA_H264AVC_NUMPARAMETERS

An end-of-list identifier, which indicates the list of supported video encoder parameters supported by this library.

Library:

libcamapi

Description:

Use these as parameters in parameter-value pairs that you pass as an argument list to video encoder configuration functions.