Technical

All technical archives.

I installed a new virtual machine(Ubuntu 12.04 LTS) for test purpose, everyting went OK during the installation. However, when I tried to launch my virtual machine after done with the installation, found it always stuck at the startup screen showing "Installing VMWare Tools, Please wait…".

Solution for virtual machine stuck at “Installing VMWare Tools, Please ...

2014/02/22 in Technical tagged vmware by Jacky Wei

One of my VS2008 Project can not run debug, however the output windows will trace out a message like this, “Binary was not build with debug information”, when I try run this project in debug mode. The problem is, as the error message suggests, you have not built your project […]

VS 2008 debug error: Binary was not build with debug ...

2014/02/06 in Technical tagged compile / debug by Jacky Wei

Issue: #ping xxxx connect: No buffer space available #dmesg Neighbour table overflow messages.

Connect to xxx failed: No buffer space available

2014/01/23 in Technical tagged arp / ping / troubleshooting by Jacky Wei

Issue description: One of my program(A) got binded with an UDP port (20500) which should be assigned to another program(B), here are the steps for trace down where A binded this port: 1. start the process with strace log: strace -f -s 128 -o proxy.strace ./pxyserverapp_redhat 2. Find out the […]

Using strace for troubleshoot an UDP port issue

2013/12/20 in Technical / TechTip中文 tagged strace / systemcall by Jacky Wei

About Phabricator, just like what said in Phabricator.org: Phabricator is a collection of open source web applications that help software companies build better software. My task here is setup Phabricator on a brand new PC. Target OS: Ubuntu 12.04 32 bit Target PC: Dell Opmix 380 Here we go.

Installation phabricator on Ubuntu 12.04

2013/09/29 in Technical by Jacky Wei

This is a guide for analysis H.245 terminalCapabilitySet and figure out does the terminal supports AAC LC or AAC LD? First capture the call and it's communication packages, KDV1000-HUAWEI.pcap. Open KDV1000-HUAWEI.pcap with wireshark. Filter the KDV1000-HUAWEI.pcap with H225||H245 Locate & expand the terminalCapabilitySet Find the items from capabilityTable which capabilityIdentifier […]

Does your H323 terminal support AAC LC or AAC LD?

2013/09/02 in Technical tagged AAC / H245 / H323 by Jacky Wei

This thread is direct forward from Microsoft MSDN website: http://technet.microsoft.com/zh-cn/aa965245 Easlier in this month, I was researching hardware video encoding/decoding supports for Linux base environments, which involves Intel Media SDK & VA-API(libva). Happen to see this DXVA related post in MSDN, so I decided to copy it to my blog. […]

Supporting DXVA 2.0 in DirectShow

2013/08/31 in Technical tagged DXVA / GPU / 硬编 / 硬解 by Jacky Wei

I’m new to H323, so if there something went wrong, please let me know it. I’ll be very apprieciated. The information in H.245 terminalCapabilitySet is really sucked. As a newbie, I have no idea what it is whatever represented in the collapsing & nonCollapsing.

Get AAC sampleRate/channels setting from H.245 terminalCapabilitySet

2013/08/31 in Technical tagged H245 / H323 / VoIP by Jacky Wei

Make your VLC player connecting RTSP streams default with RTP ...

2013/08/24 in Technical tagged RTSP / VLC by Jacky Wei

I bought myself a new notebook last Saturday, and installed a lot develop softwares on it. But when I tried to install Visual Studio 2010, I got a error like this: [code] [08/06/13,23:08:05] Microsoft .NET Framework 4: [2] Error code -939523550 for this component is not recognized. [08/06/13,23:08:05] Microsoft .NET […]

Failed to install Visual Studio 2010 on Win7

2013/08/06 in Technical tagged Visual Studio by Jacky Wei

I installed ia32-libs, but got an error like this while compiling my program(already added -m32 option to CPPFLAG arguments in the Makefile) [code] jacky@ubuntu-msdk:/opt/workspace/msdk/src/msdk_client32$ make /usr/include/features.h:324:26: fatal error: bits/predefs.h: No such file or directory compilation terminated. /usr/include/features.h:324:26: fatal error: bits/predefs.h: No such file or directory compilation terminated. g++ -m32 -I./../base_shm […]

How to compile 32 bit programs on 64 bit Ubuntu ...

2013/07/30 in Technical tagged 32bit / 64bit / compile / gcc / Makefile by Jacky Wei

720P H.264 video decoding performance Yesterday I got two test H.264 ES stream files from one of my colleague. One was encoded by Main Profile, the other was encoded by Baseline Profile. Weired thing is decoding the Main Profiled file seems much more fast than the Baseline Profiled file. To […]

Performance tests of Intel Media SDK(4.0.026-HSW): Efficiency comparision between different ...

2013/07/26 in Technical tagged GPU / MSDK by Jacky Wei

After finished my first phase of GPU – Intel Media SDK research, now it’s time to get into libva, my goal is to get a set of performance test report for both MSDK and libva, so that we can finally choose one of them, or both of them for product […]

Step by step: build libva 1.2.0 on Ubuntu 12.04 LTS

2013/07/22 in Technical tagged GPU / libva / VA / va-api by Jacky Wei

Performance test – multithread decode Media SDK version Intel Media SDK (4.0.024-HSW) Test environments CPU: Core ivy bridge i7-3770 OS: Ubuntu server 12.04 LTS, kernel version 3.2.0-23 x86_64 x86_64 x86_64 GNU/Linux Test program kdvcodec_msdkdec_mt (svn: 10) Working mode a. Decode with simulated block mode b. Return with NV12 buffer. c. […]

Performance tests of Intel Media SDK (4.0.024-HSW) – Multithread decode

2013/07/17 in Technical tagged GPU / Intel / MSDK / 硬编 / 硬解 by Jacky Wei

It’s a test report of current/latest version of kdvcodec_msdkdec which based on the latest version of Intel Media SDK(4.0.024-HSW). There is a known issue, NV12 to YV12 (or YUV420P) conversion, which is very low in efficiency. Here are the details.

Performance tests of Intel Media SDK (4.0.024-HSW) – Decode

2013/07/12 in Technical tagged GPU / Intel / MSDK / Tests by Jacky Wei