[imx6ull] video monitoring project (USB camera +ffmepeg)

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Preface

Reference video :
Mr. weidongshan takes you from 0 Start to build a video surveillance system

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1、 Introduction to the overall scheme

This article is well written , It's easy to understand , No more wheels
The punctual atoms imx6ull Development board video monitoring project practice series 1: Introduction to the overall scheme

2、 To configure v4l2 Driving and UVC drive

1. Because the kernel source code of punctual atom is not enabled by default ,UVC Device driver , You need to configure and compile it yourself
   

2. Insert usb camera , The console outputs device information , prove UVC The driver has been compiled successfully

   usb 1-1.3: New USB device found, idVendor=0c45, idProduct=64ab usb
   1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb
   1-1.3: Product: Integrated_Webcam_HD usb 1-1.3: Manufacturer: 170428-
   uvcvideo: Found UVC 1.00 device Integrated_Webcam_HD (0c45:64ab)
   input: Integrated_Webcam_HD as
   /devices/platform/soc/2100000.aips-bus/2184200.usb/ci_hdrc.1/usb1/1-1/1-1.3/1-1.3:1.0/input/input3 usb 1-1.4: new high-speed USB device number 4 using ci_hdrc usb 1-1.4:
   New USB device found, idVendor=0bda, idProduct=8179 usb 1-1.4: New USB
   device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1.4: Product:
   802.11n WLAN NIC usb 1-1.4: Manufacturer: Realtek

3. see /dev/video*, There are video device files , prove UVC The driver has been compiled successfully

3、v4l2 Application programming test camera

1. Test plan

   Project the image obtained from the camera onto RGB566 display

2. transplant libjpeg

   Because my camera only supports image format :MJPEG,YUV422, The display only supports RGB565, So you need to use tools to MJPEG Transcode as RGB565.

3. v4l2+framebuf Application Programming

   Hereby libjpeg+v4l2+frambuff+ The migration process is shared

4、ffmepg transplant

1. brief introduction

   The punctual atoms imx6ull Development board video monitoring project practice series 3:
   ffmpeg
   This article introduces ffmepeg The purpose of the camera and the way of streaming the camera

2. transplant
   Because the documentation of punctual atoms is not correct ffmpeg Detailed migration steps , I found several transplant descriptions on the Internet , But it's not true , Only this is suitable for my board .
   The following is my running script , It can be directly copied away for use , Bear in mind 16,17 The content of a bank cannot be run by a branch , Return error
   FFmpeg transplant - Xunwei IMX6ULL Development board

     1 #!/bin/bash
     2 ./configure \
     3 --cross-prefix=arm-linux-gnueabihf- \
     4 --enable-cross-compile \
     5 --target-os=linux \
     6 --cc=arm-linux-gnueabihf-gcc \
     7 --arch=arm \
     8 --prefix=/home/sheldon/linux/tool/ffmpeg-install \
     9 --enable-shared \
    10 --disable-static \
    11 --enable-gpl \
    12 --enable-nonfree \
    13 --disable-ffplay \
    14 --enable-swscale \
    15 --enable-pthreads \
    16 --disable-armv5te --disable-armv6 --disable-armv6t2 --disable-x86asm \
    17 --disable-stripping --enable-libx264 \
    18 --extra-cflags=-I/home/sheldon/linux/tool/x264_install/include/ \
    19 --extra-ldflags=-L/home/sheldon/linux/tool/x264_install/lib/ --extra-libs=-ldl
   
   

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summary