Memory tuning
Vendor kernel memory modules take around 5 megabytes of RAM (code with dynamic memory for buffers) and some of them are useless if you don't need specific functions like (OSD, motion detection, audio, H264/265/JPEG codecs)
| Feature | Modules | Size |
|---|---|---|
| Audio output | hi3516ev200_ao hi3516ev200_adec | |
| Audio input | hi3516ev200_ai hi3516ev200_aenc | |
| Audio support (both input and output) | hi3516ev200_acodec hi3516ev200_adec hi3516ev200_aenc hi3516ev200_ao hi3516ev200_ai hi3516ev200_aio | |
| I2C sensor support | hi_sensor_i2c | |
| SPI sensor support | hi_sensor_spi | |
| PWM support | hi_pwm | |
| Motion detection | hi3516ev200_ive | |
| JPEG snapshots | hi3516ev200_jpege | |
| H.264 codec support | hi3516ev200_h264e | |
| H.265 codec support | hi3516ev200_h265e | |
| OSD support | hi3516ev200_rgn |
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