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  • Rychlejší aplikace i bez zmen dotazu - 3.díl - vliv hromadných operací a shrnutí

    - by david.krch
    V predchozích dvou dílech jsme si ukázali, jak lze vzorový príklad vkládání 100.000 záznamu zrychlit, pokud se nám podarí minimalizovat pocet commitu a zacít používat v dotazech vázané promenné. Temito dvema zmenami jsme puvodní cas 167 sekund snížili postupne na 105 a následne na 19 sekund. Ke slibovanému osmdesátinásobnému zrychlení potrebujeme dosáhnout ješte cca desetinásobného zrychlení. Provedeme to tím, že se 100.000 jednotlivých operací pokusíme prevést na menší pocet hromadných operací.

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  • Is there any algorithm for finding LINES by PIXEL COLORS on picture?

    - by Ole Jak
    So I have Image like this I want to get something like this (I hevent drawn all lines I want but I hope you can get my idea) I need algorithm for finding all straight lines on it by just reading colors of pixels. No hard math, no Haar, no Hough. Some algorithm which would be based on points colors. I want to give to algorithm parameters like min line length and max line distortion. I want to get relative to picture pixel coords start and end points of lines. So I need algorithm for finding straight lines of different colors on picture. Algorithm which would be based on idea of image of different colors and Lines of static colors. Yes - such algorithm will not work for images with lots of shadows and lights. But It willl probably be fast (I hope so). Is there any such algorithm?

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  • Cross-platform DirectShow alternatives for real life graph

    - by Ole Jak
    Today I have such graph. I run it on windows I need some easy crossplatform DirectShow like alternative where to reconstruct such graph will not be a hard task. Where can I get such alternative? *(and If you can presenta way to reconstruct such graph in It It would be grate!) BTW: By crossplatform I mean Linux Mac and Windows compatible, By using SampleGrabber I ment I need to be able to get data from that step of graph from my programm and I use VirtualCamera from here soundmorning.com/download.php

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  • What Parallel computing APIs make good use of sockets?

    - by Ole Jak
    My program uses sockets, what Parallel computing APIs could I use that would help me without obligating me to go from sockets to anything else? When we are on a cluster with a special, non-socket infrastructure system this API would emulate something like sockets but using that infrastructure (so programs perform much faster than on sockets, but still use the sockets API).

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  • How to make HTML div follow its page position while scrolling?

    - by Ole Jak
    So I have a page like this you look at. On top I have some special informative div (here it contains something like links to | logout | about | faq | search ). I want on page scrolling (down) that div follow page like it stands above it. I want it to work in IE 5,6,7,8,9 and FF 1.5 and above. How to solve such problem? If your answer contains JS it shall be libs (like jQuery) independent. If html - No frames, Iframes

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  • Pure C# open source PCM to Ogg convertor?

    - by Ole Jak
    Microsoft Silverlight 4 is in beta. It supports PCM audio output. It would be madness to stream PCM over internet (for ex in P2P chart webApp) so we need Pure C# open source PCM to Ogg convertor. No unmanaged code, nothing going out of .net sandbox. So does any one know such Pure C# open source PCM to Ogg convertor? What do I need: Open Source Libs for encoding. Tutorials and blog articles on How to do it, about etc. BTW: why Pure C#? - because Silverlight 4 does not support unmanaged or just not C# DLL's. BTW2: this question is similar to this one but it is different because Ogg is Open Source, free while mp3 will not be free until 2010

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  • Is there any readable Tao.FFMPEG how to?

    - by Ole Jak
    So FFmpeg is grate lib and there are some wrappers for it in C#. Tao is one of my choise. But how to use it 0) In general 1) with live http streams 2) with FLV format There is Tao.FFmpeg help which comes with TAO installl but it is just not for me - I do not get a lot out from there. So I need some richt and clear Blog posts or books on how to use tao for all 3 of my needs (described above)

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  • Is there any super fast algorithm for finding LINES on picture?

    - by Ole Jak
    So I have Image like this I need some super fast algorithm for finding all straight lines on it. I want to give to algorithm parameters like min length and max line distortion. I want to get relative to picture pixel coords start and end points of lines. So on this picture to find all lines between dalles and thouse 2 black lines on top. So I need algorithm for super fast finding straight lines of different colors on picture. Is there any such algorithm? (super duper fast=)

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  • Hidden Features of MXML

    - by Ole Jak
    What are some of the hidden features of MXML? MXML being used in Flex Framework became quite popular language (because Flash Player is something every PC has and Flash Builder, Flash Catalist are quite popular Adobe programms) So at least from the existing features, do you know any that are not well known but very useful. Of course, this question is along the lines of: Hidden Features of ActionScript Hidden Features of JavaScript Hidden Features of CSS Hidden Features of C# Hidden Features of VB.NET Hidden Features of Java Hidden Features of ASP.NET Hidden Features of Python Hidden Features of TextPad Hidden Features of Eclipse Hidden Features of HTML Please specify one feature per answer. Note that it's not always a great idea to use these hidden features; often times they are surprising and confusing to others reading your code.

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  • Search for Transliteration tables

    - by Ole Jak
    So If your native language is not EN_US or you know any other spoken language just fine you can esely contribute!) I persanaly will give +1 for every full anser on any language. The Arabic Alphabet and Its Transliteration The Bulgarian Alphabet and Its Transliteration Wanted!=) ** Bahasa Indonesia Bahasa Melayu Català Cesky Dansk Deutsch Eesti ???????? Español Esperanto Euskara ????? Français Galego ????? Hrvatski Italiano ??? Lietuviu Magyar Nederlands ??? Norsk (bokmål) Norsk (nynorsk) Polski Português Româna ??????? Slovencina Slovenšcina ?????? / Srpski Suomi Svenska ??? Ti?ng Vi?t Türkçe ?????????? ??

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  • How to create playable FLV video from part of FLV file using FFMPEG?

    - by Ole Jak
    So we had real FLV video file. we had devided it into 3 parts (more or less equal, not looking into structure orcontext). We have taken second part and forgot about first 2. Video contained audio and video track. mp3 and on vp6. Is it any how possible to play thsat second part after sending to ffmpeg some command? So how to (using any FFMPEG API (in general in any programming language) or using command line) turn bytearray into playable video? (knowing what format video was created in and some other data like used codecs )

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  • How to stream your images/files with VLC? (C# .Net)

    - by Ole Jak
    So I know there are lot of wrapers of libVLC.dll . But I just do not know what one is ready to do what I need... What I need is simple... in my C# programm I create some bitmap (once or twice per second)... I now want to stream bitmaps live as video (in some format VLC can to offer me) to some http:localhost:port/ using VLC... What libvlc.dll wrapper can help me with that?

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