Introduction

This page dedicated to understanding of High level design for Normal Thumbnail in R-Pi Zero.

• Supported WiFi connection.
• v4l2 Driver is used to capture YUV data from RPI-0 camera Device.
• /dev/video0 is the RPI-0 camera device to capture data.
• Supported Soc level Gstreamer plugins to capture data from camera device.
• Supported openCV to convert YUV data into JPEG Image.
• Stored generated JPEG image in local /tmp directory.

Architecture

Design Considerations

• Gstreamer Soc Implementation for RPI-0 Camera
  

• Enabled V4l2 driver in part of RPI-0 to capture data from /dev/video0  device.
• Implemented soc level gstreamer pipeline with v4l2src plugin and appsink plugin.
• V4l2src plugin is used to capture yuv data from camera through v4l2 driver based on capsfilter( format : NV12 )and transmitted captured yuv data into appsink plugin to write yuv data into 8080 port of mongoose server.
• Registered 8080 port in Mongoose server to listen data.

• Gstreamer Implementation in Normal Thumbnail
  

• Implemented gstreamer pipeline in Normal Thumbnail side with souphttpsrc plugin and appsink plugin.
• Souphttpsrc plugin will get yuv data from Mongoose server from 8080 port and transmitted yuv data into appsink plugin.
• From appsink plugin normal thumbnail will get yuv data and converting it into JPEG image with the help of OpenCV.
• Stored generated JPEG image in local /tmp directory of RPI device.