EzDevInfo.com

State-of-the-art GPU volume rendering

what is the current technique for implementing a GPU based volume renderer in the medical context, i.e. reasonable amounts of image data (512x512x1500 or more at 16bit) and interactive/real-time performance with optimal image quality? Is it still the raycasting approach introduced by Krüger and Westermann (color cube etc.)? Or have CUDA/OpenCL changed the traditional Cg/GLSL game?

Thanks for any hints, paper references etc.! Matthias

Enabling DVR Functionality in Android Media Player

I am streaming a m3u8 video using android Media Player. Now our requirement have changed so we need to enable the DVR functionality in Our video player.

we have enabled the DVR functionality for the streaming and it works fine in iOS. we can scroll back in iPhone. but in android its seems like android media player dosen't support DVR.

can anyone help me to do this. Is there any Opensource library or SDK available for this.

Thanks

Streaming video from a DVR with ethernet/serial port

I have a DVR camera with a serial port and also an ethernet port. 4 cameras are connected to this DVR. I can connect this ethernet or serial port to my controller. From my controller board (running on ubuntu ) which also has GSM, would I be able to stream the video to a server ?

DVR software for Ubuntu

Can someone suggest a free and good DVR software for Ubuntu 12.0.4 LTS ? I have a network camera (ethernet) and a hard disk. I want to be able to record video from camera and also do live streaming to a browser occasionally. I was thinking of using motion software, but with that I believe you cannot prevent it from live streaming all the time to a browser and also it supports only serial and USB cameras and not Ethernet/WiFi camera. But in my case I want live streaming only when I Send a message to my Ubuntu based system to enable live stream, but keep recording all the time.

Do DVR's use a standard protocol for streaming?

I'm not sure exactly where this question needs to be placed but seeing that its programming related I think for now stackoverflow can work.

I am investigating consuming the video feeds of various network enabled DVR's. What I want to do is to "slap down" a network enabled DVR and consume its video channels/stream over a network without having to custom develop specifically for that DVR via their manufacturer SDK.

To achieve this I understand that each DVR system would need to implement a protocol standard (which i suspect they do not). So my question is; Do DVR's use a standard protocol for streaming video over a network or are they all proprietary requiring custom development for pulling their video streams?

Update:

According to this question/answer DVR client software SDK tools? DVR's do not use a standard protocol but they can support a standard. I've investigating this currently and will post back when I know more.

dvr surveillance systems development in iphone

I have one question. May be it is a very generic question, please forgive me.

In our office we have installed a Samsung DVR-1670. We are planning to develop mobile surveillance software for that. That is somebody should be able to monitor and manage the installed cameras from mobile device. We are planning to do in the iOS, Iphone. I know lots of readymade software’s are available in the market. But we are doing this as part of the study we are doing here.

When I checked the catalog of svr-1670 it says that it supports HTTP, RTP, RTSP, SOAP protocols. So I think we can do what we are planning to do. I will definitely contact the technical forums of Samsung, but before that I want to ask in this forum.

My questions are, 1. RTSP Streaming is supported in SVR 1670, How can we get a streamed data from the DVR using this protocol. 2. Availability of DVR APIs for PTZ functionality 3. Have any one worked in the similar projects?

IS there any open sources are available for the same?

Use MFC library without MFC

I'm using pure C with Windows SDK in my projects, but now I need to deal with DVR's camera, which the driver was made in MFC 6.0.

I can switch to C++ at any time (I'm already using it in some modules), but in this camera SDK I need CWnd's object.

//Initialize is a function, which initializes the related SDK instance.
Void Initialize(CWnd* pParent)

Can I create a fake CWnd, without loading the MFC stuff into MFC project, but just using my plain CreateWindowEx() ?

Thank you.

DllImport a file with drv extension

I found this statement saying :

[ DllImport( "winspool.drv",CharSet=CharSet.Unicode,ExactSpelling=false, CallingConvention=CallingConvention.StdCall )]
public static extern long OpenPrinter (string pPrinterName,ref IntPtr phPrinter, int pDefault);

I want to know why it didn't import winspool.dll since it is a DLLImport command and what is the difference between winspool.dll and winspool.drv

Super Mini NVR Configuration issue

I have Super Mini NVR Configuration I got problem with configuration to access nvr via internet

currently the nvr I can access it via local address but I can't access using my Ip address

I configured the port forwarding in my dlink router (set it 5050) this is screenshot from my router http://i.minus.com/i5X1sGG0M78dn.png

i.minus.com /ibkOFH4t9aowfO.png

I test it using canyouseeme show me I can see you 5050 my nvr configuration screenshot http://i.minus.com/ibhLwRpvAkYaQj.png

when I fill my 42.54.65.76:5050 in internet explorer not respond at all

please tell me where I'm wrong

Login to DVR using TCP socket

I want to create a client for myself to connect and show my DVR stream.

I have sniffed the traffic on an android device when a working client app makes a TCP connection and all it seems to send to the DVR is H( )8admin1 and then the data comes along. (admin and 1 are login credentials)

I have tried to do the same with a socket tester app in android and also on windows just to try to get the data coming but even though I send the same string to the DVR it doesn't start sending packets as it does when other client apps send the same string. I see in wireshark that an ACK packet is received in response to sending the string.

Can anybody point out what I might be doing wrong please or something else to try?

Thanks

Peter

How to Stream video from DVR Camera

I am developing an application in Website connect with DVR camera. I have camera and DVR with the same brand "POEPLE" and router with the brand "ubiquity". My DVR hasn't menu rtsp.

I can connect to it using iPhone apps nvsip or using windows application "CMS 2.0" or open nvsip.com from Internet Explorer. I know username, password, ip dvr and other. Now, I want to open Streaming Video by my application.

I have try to find out and search IP address camera when I open it by nvsip.com or CMS 2.0 but failed. I try wowza streaming application to make rtsp from my camera but I can not configure it properly.

Any Idea to get link rtsp from my dvr camera?

Video format in network frame

I have an old DVR device and I need to play a captured video extract in VLC without the web activex disgusting application.

I captured the video with Wireshark and obtained a TCP stream like that.

There are a few blocks here and there with 0/1-padding and these "NENDNDAV" messages, and others with binary data as on the screenshot above.

However I can't seem to decode this as RTP/RTSP or whatever.. Do you have any idea on what to do to achieve my objective ?

Simply broadcast one IP camera through a webpage

I just want simply to show a video stream from a single IP cam (with video output) into a webpage. The DVR's offers variable graphical interfaces that I dont want it, I want to make my custom way to display a single cam. Thanks a lot

Android: P2P Remote Control App

I wanted to build a P2P Android app to connect to DVR (for CCTV camera) and perform operations that would be done when connected to DVR through local LAN. I understand I need a P2P server to enable connection between the app and the DVR but I am stuck after that. Any help on how to get started and steps that I will have to follow to make it happen?

videojs: manipulate start-value of SeekBar (always 0), to support DVR/DVR-like streaming

I want to realize something similar like http://www.dash-player.com/demo/live-streaming-dvr/, using videojs.

I get a manifest.mpd (type=dynamic) from the wowza streaming engine with timeShiftBufferDepth set to 15 minutes. I am using videojs v4.12.15, dashjs v1.5.0 and videojs-contrib-dash v1.1.1 to display the stream.

As you can see, the SeekHandle is at position 0. The currentTime is at 216:07:07 (from the manifest.mpd), and the duration is 4.99… enormous. (videojs seams to have some problem with infinite, but that is not important here)

When the video proceeds, the SeekHandle stays at position 0, because the duration (the enormous number) is too high, and cannot be reached. videojs seams to progress the SeekHandle in percentage of the duration. When I set the duration to the currentTime,

player.on("timeupdate", function () {
   this.duration(this.currentTime());
});

the SeekHandle appears at the end.

When I now try to seek in the SeekBar, the SeekBar contains the values from 00:00:00 to the duration-value (currentTime == 216:07:07). As of the nature of a stream, I can not seek back to the beginning of the stream, but thanks to dvr i can go back 15 minutes.

This means, I want to be able to seek from currentTime-15min (215:52:07) to currentTime (216:07:07). To achieve that, I would have to alter the start-value of the SeekBar, and that is exactly where I am lost. i do not know how to alter it from 00:00:00 to currentTime-15min (215:52:07)

tl;dr How can I change the start-value of the videojs SeekBar on init or later?