hi_venc_h264_attr

rcn_ref_share_buf_en

Buffer sharing enable for the reference frame and write-back frame. Reserved.

Value range: [0, 1]. 1: enabled; 0: disabled.

This is a static attribute.

frame_buf_ratio

Frame buffer ratio. After being set, the system compresses the frame buffer based on the ratio.

Value range: [70, 100] For example, if frame_buf_ratio is set to 80, the frame buffer size is 80% of the original size.

• The default value is 100, indicating that the frame buffer is not compressed.
• If the value is not within the value range, the frame buffer is not compressed.
• If the value is within the range of [70, 100), the frame buffer is compressed proportionally, which may affect the encoding quality. You are advised to set this parameter to a value within the range of [70, 100) when the image texture is not complex, the resolution is greater than 640 x 480, and there is a requirement on the memory bandwidth.