Home PC Games Linux Windows Database Network Programming Server Mobile  
  Home \ Linux \ Achieve camera preview by ffplay     - Workaround CentOS error message during compilation PHP5 common (Linux)

- Customize the 404 error page Nginx (Server)

- Linux SVN account password to save your settings (Linux)

- Linux Mint 17 set up the Ruby environment (Linux)

- Scope of variables in C # (Programming)

- MySQL appears data too long for column 'name' at row 1 to solve (Database)

- Help you make Git Bisect (Linux)

- Linux system security configuration (Linux)

- Mutt - an email client that sends messages through the terminal (Linux)

- Large computer network security policy Experience (Linux)

- Graphical interface for the CentOS 6.4 installed and connected by remote VNC (Linux)

- Android in the coordinate system and a method to obtain the coordinates (Programming)

- Linux Beginner Guide: Installing packages on Ubuntu and Fedora (Linux)

- Linux script to copy the folder to all folders with the same name (Linux)

- Why did not Oracle privileges can also log in with sysdba (Database)

- Java NIO in the world (Programming)

- Linux linux system security (Linux)

- Monitoring services are running properly and will email alert (Server)

- CentOS 6.x Basic System Optimization after installation (Linux)

- Python Basics: Search Path (Programming)

  Achieve camera preview by ffplay
  Add Date : 2018-11-21      
  Hardware platform: Jetson TK1 Development Board (NVIDIA Tegra K1 Mobile Processor 32bit), Ningbo Sunny electric SP103A (OV16825) Module
Software platform: Ubuntu / Linaro 4.8.2-16ubuntu4 (Linux version 3.10.40 32bit)

Camera driver has been achieved, support v4l2 interface.

First, install the SDL library for the first time by the SDL-1.2.14 version of the source code for the install, always prompt when using SDL initialization failed. Second to enter the command "sudo apt-get remove libsdl1.2debian", "sudo apt-get install libsdl1.2-dev", and then install the SDL-1.2.15 source code to solve the problem through.

Then install x264, relatively simple steps
$ Git clone git: //git.videolan.org/x264.git
$ Cd x264
$. / Configure
$ Make
$ Sudo make install

Finally install ffmpeg, via git to download the latest version of the official website, the current version is version 2.8, by configure --enable-memalign-hack --enable-static, make, sudo make install to install it.

Our drive output is the raw sensor data for bayer raw10 format, each color occupying 16bit, only the lower 10 bits are valid data, order bggr. ffmpeg original code is not supported raw10, we need to make some modifications. Original code support bayer raw8 and bayer raw16, because bayer raw10 and bayer raw16 occupies two bytes are the same, so we refer bay raw16 modified. First ff_fmt_conversion_table in libavdevice / v4l2-common.c in an increase, where we directly borrowed raw16 format in the application process seems raw10 as raw16 use V4L2_PIX_FMT_SBGGR10 when v4l2 interface calls.


For raw16, currently code libswscale / bayer_template.c in BAYER_SHIFT set to 8, indicating that the lower 8 bits directly discarded because raw10 can only give up two low, so we will BAYER_SHIFT to 2.

To facilitate debugging can libavutil / log.c in av_log_level into AV_LOG_TRACE from AV_LOG_INFO, output for more information.

After finish the above changes recompile, install ffmpeg, then use the command "ffplay -f v4l2 -input_format bayer_bggr16le -video_size 4608x3456 -i / dev / video0" preview can be achieved, or if prompted SDL initialization fails, you can enter the shell DISPLAY =: 0 export DISPLAY command and set about DISPLAY.
- Linux Command Line Art (Linux)
- Ubuntu 14.04 LTS 64-bit installation and activation Sublime Text 3 can not solve the Chinese input method to solve the problem (Linux)
- Linux iptables: combat scenes (Linux)
- Detailed Linux su command to switch users Mistakes (Linux)
- Using monitoring tool dsniff (Linux)
- tespeed - test speed of Python tools (Linux)
- KVM virtualization nested configuration (Server)
- Linux, modify the hostname (Linux)
- How to install and use the Snort in Ubuntu 15.04 (Linux)
- Linux-du and df command (Linux)
- Linux Log Clear (Linux)
- DRBD switchover (Server)
- Docker deployment practices in Ubuntu (Server)
- How do I use Linux development environment (Linux)
- About Samba certification process and permissions (Linux)
- MySQL & NoSQL - Memcached widget (Database)
- How to use SVN to manage our source code (Server)
- VirtualBox installation enhancements let the mouse move and share CentOS 6.4 (Linux)
- Linux vi command list (Linux)
- Linux program analysis tool: ldd and nm (Linux)
  CopyRight 2002-2022 newfreesoft.com, All Rights Reserved.