The DVR is configured with a m clock speed of arm11 and M memory, half of which are allocated to the video decoder. The kernel and other processes also occupy a lot of memory, leaving less memory for Qt to run. Later, we transplanted QT browser and QT WebKit to the DVR for map display. Although some functions have been cropped out, the running is still very card, and the QT interface process is easy to ente
Implement your own RPi. GPIO (1)-Python C Extension, rpi. gpio-python
Raspberry Pi has a Python module of RPi. GPIO. After import, you can directly use Python to operate the GPIO hardware module of the ARM chip. I think this is very interesting, so I want to implement this module on my own DM8148 platform.
DM8148 is a Da Vinci digital image processing chip launched by TI. It has slightly lower performance but lower power consumption than DM8168. In the past, many image processing companies used
The Raspberry Pi has a Rpi.gpio python module, which can then be used to manipulate the GPIO hardware modules of the ARM chip directly with Python. Think this is very interesting, so look for information in their own painting DM8148 platform above also achieve such a module.DM8148 is ti launched a Da Vinci series of Digital image processing chip, slightly worse than DM8168 performance, but lower power consumption. Before the company's many image processing is the use of DM8168, but the thermal a
In this configuration, we used the Intel Z68 motherboard for the first time, it has the solid-state hard disk caching technology, can use the solid-state hard disk as the high speed large capacity cache, effectively enhances the mechanical hard disk speed. It will also use the I5 23,004 nuclear processors that are available in other small cities.
Accessories Name Accessories model Price (yuan)
C P U Intel Core i5 2300 (Loose) 1080
Radiator Kyushu Winds Ice mini flagship version 59
Motherboar
Black more than 70 surveillance cameras are so simple
Recently, a security researcher found that surveillance cameras sold by more than 70 vendors are vulnerable to Remote Code Execution (RCE) attacks.
According to the Rotem Kemer study by security researcher, surveillance cameras sold by more than 70 vendors are vulnerable to Remote Code Execution (RCE) attacks.
The researchers noted that the products being sold by the supplier use the same firmware that is vulnerable to RCE attacks.
In the "
First, the actual use of peanut rods wiring method:1. Connect the peanut wand and the router's LAN port with a network cable first2. Power the peanut wand with an external USB power supplyPeanut Rod-USB power supply (optional):Peanut sticks do not have their own power supply, but we picked out the quality of the better USB power.Note: Be sure to use a stable external USB power supply to ensure proper use of the peanut stickSecond, peanut stick set use method:1. Enter www.oray.cn in the browser t
A few days ago, I saw yuanyouFarmer's uncleThe C # Video Monitoring series has been written to encapsulate hikvision boards. The projects involved in these days have entered the subsequent stages, and performance testing is now underway. test the stability and concurrency of the Streaming Media Server. Let's take a look at the effects of-concurrent video processing. The Department does not have so many computers for testing and simply writes a simulated Client AccessProgramTo test the server pro
The DVR is configured with a m clock speed of arm11 and M memory, half of which are allocated to the video decoder. The kernel and other processes also occupy a lot of memory, leaving less memory for Qt to run. Later, we transplanted QT browser and QT WebKit to the DVR for map display. Although some functions have been cropped out, the running is still very card, and the QT interface process is easy to ente
These days, we have been working on dynamic library testing. H has written a written dynamic library-the library of the preprocessing module. The video processing project must be connected to the actual situation for testing. Requirements: 1. Connect the actual camera, read the real-time data stream, and save it to the dual-loop linked list; 2. Test the functional effects of Background Modeling; 3. Pre-processing the four data (image) display results; 4. Test the real-time processing of mul
Copy dvrrdk to/usr/local/dvrrdk_03.00.00.00/target/rfs_816x and rename it DVR.
For example, after completing the QT environment configuration (refer to the LZ article above), open qtcreator "file"-> "open file or project"
Select the. Pro file to open the project. Click "project" and set it as follows:
"Tools"-> "build and run"
"Linux device"
Compile after setting
Copy the generated executable file to the board
Start Development Board
Go to/
, The process by which the device automatically starts the malware after it restarts.5. Developer Error reading chip maker Debug document leads to new kernel vulnerabilityThe U.S. computer Security Emergency Response Center (hereinafter referred to as CERT) released a recent announcement that Windows, MacOS, Red Hat, Ubuntu, SUSE Linux, FreeBSD, Systems such as VMware and Xen are likely to be affected by a major security vulnerability (CVE-2018-8897), due to the fact that operating system develo
Security Emergency Response Center (hereinafter referred to as CERT) released a recent announcement that Windows, MacOS, Red Hat, Ubuntu, SUSE Linux, FreeBSD, Systems such as VMware and Xen are likely to be affected by a major security vulnerability (CVE-2018-8897), due to the fact that operating system developers misinterpret the debug documentation of both Intel and AMD chip vendors. 6. high-risk vulnerability can be caused to the Sea Conway video camera,
the application. The cache policy is declarative, and its configuration is implemented through the XML configuration descriptor. Therefore, your application will not be affected and maintain compatibility and portability with J2EE specifications. At the same time, you will also get performance optimizations from the cache mechanism of WebSphere servlet and JSP.
The performance improvement from the Dynamic Caching mechanism of servet and JSP is obvious, depending on the characteristics of the a
example below, just like XML, you can generate this format through any dynamic page, or read it through static or even TXT.
[{"Name": "Hans", "age": "32 "},{"Name": "John", "age": "12 "},{"Name": "Zaki", "age": "34 "},{"Name": "Dr. Cox", "age": "88"}]
Package {Import com. adobe. serialization. json. JSON;Import flash. display. Sprite;Import flash. events. Event;Import flash.net. URLLoader;Import flash.net. URLRequest;Public class getjson extends spri
IPhone DevelopmentThe required documents are described in this article.Iphone DevelopmentSeveral Basic concepts are also issues that must be clarified before development. Let's take a look at the details.
About Objective-C
Objective-CIs the official language for developing iPhone applications.
In 1986, Brad Cox wrote Objective-C language on the basis of the first pure object-oriented language Smalltalk. After that, Brad
good as the script written by stackless python.
Although the go compiler has a lot of optimization space, the efficiency of the generated machine code is relatively high. The standard library, including various runtime codes, such as garbage collection and hash tables, is not optimized yet, and some are still in a very preliminary stage. This is one of the reasons why the test results on the network are significantly different. In addition, as a new language, developers are not familiar with i
Document directory
01. Ian James Cox
02. Deda
03. CMYK08
04. Ashfall
05. Itai Inselberg
06. Made By Vadim
07. Jan Ploch
08. Mind Born
09. Mark Lawrence Design
10. Brandon Mercier
11. Buses at the Brewery
12. Francesca Nini
13. Its Pronounced Frits
14. Brock Kenzler
15. Lesly
16. Alex Malyukov
17. Design Embraced
18. Mufeed
19. Arunsfolio
20. Rahult
21. Digital Drop
22. Christopher
23. Colin Roy Grist
24. Werbungrockt
25. Nen
still has a lot of space for optimization, but the resulting machine code efficiency is relatively high. The standard library-which includes various runtime code, such as garbage collection, hash tables, and so on-has not been optimized yet, and some are still in a very rudimentary phase. This is one of the reasons why there are serious differences in test results on the network. In addition, as a new language, developers are unfamiliar with it, writing code may have performance bottlenecks, bu
70 's (and C-age ^_^), making the error handling code lengthy and repetitive (partly because of the previous mentioned: do not ignore any error code), For example, some common error-handling code forms are as follows:
err := doStuff1()if err != nil { //handle error...}err = doStuff2()if err != nil { //handle error...}err = doStuff3()if err != nil { //handle error...}
There's no way to refute these arguments, Russ Cox, one of the go authors,
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.