Category Archives: Software

How to automatically convert mp4 video file to divx format

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I developed this solution because I was tired for tedious tasks related to conversion of nowadays mp4 files to avi format readable by my Panasonic plasma TV. These tasks requires getting important parameteres from mp4 files like video and audio bit rates and concluding long command line for ffmpeg utility.

How to convert magnet links into .torrrent file in Firefox

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Some torrent servers do offer only magnet links instead of .torrent files. If you are curious what magnet links means please read the magnet link explanation on this link. If you have torrent client on the desktop (uTorrent, vuze), you are required only to configure your favorite browser to redirect magnet file to the desktop client. But what to do if you need to download the good old torrent file?

How to make screencast?

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I’ve decided to make Photoshop tutorials for editing of photos. My friends-photographers asked me for to do it.  They also requested the format of those tutorials – video supported by narration. Screencasting looks like perfect technology for this task, because screencasting is video recording of computer screen output.

There is a plenty screencasting tools on the market. I selected CamStudio Recorder. CamStudio Recorder is an open-source software, it makes possible to use lot of video codecs and it allows also voice recording. All of this was important, because I did not want spend money (I spent time!), I wanted to use video codec compatible with YouTube and I wanted to record my voice as narration of the tutorial.

How to create your own vector offline maps?

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I am preparing for the upcoming photo workshop in winter’s Scotland now. Because I recently switch from Nokia N900 to Samsung Galaxy S Duos, I also wanted to update my navigation toolset. I installed popular Locus application on my handset and tried to use it with up-to-date vector Openstreetmap maps.

How to encode video by ffmpeg using DivX codec

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This is just a remark for me, because occassionally I need to convert mp4/x264 video using DivX codec, but due to random applicability I am not able to remember it. Why DivX? Video encoded by DivX is only one reliable option for me how to stream video from my NAS to TV without any interruption. I am using ffmpeg utility for video conversions, it is a reliable cross platform tool with lot of features and I am mostly happy with it.

So how to do it? Simple run something like  following command (the most important bolded):

How to enable and configure Optware during start of NAS server

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There was unpleasant surprise for me that command for running nano editor did not work on my NAS server QNAP TS-419P. I had no time to investigate causes, so I had to use vim to complete task, but after its completion, I’ve returned to the problem.

Nano editor is one of popular packages which extends capabilities of your NAS server. These packages are available for QNAP NAS servers via Optware IPKG system. Therefore I tried to use ipkg command to discover a probable problem with packages, however even ipkg did not work. It did not work because whole /opt directory was not simple available, ouch! How it is possible? I don’t know, maybe the newest firmware 3.8 has some bugs, but it does not matter, I want to bring ipkg back to the operation.

Conditional SumProduct in Excel by only one step

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Just hint for me. Today I’ve learned useful shortcut how to make quickly conditional SumProduct in Excel in one step (without creating new column).

Konfigurovat wifi kanál v paneláku je nutnost

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Dneska jsem u tchýně přenastavoval wifi router. Stěžovala si, že už dlouhodobě je ten internet čím dál více pomalejší a že poskytovatel ji odkázal na helpline, kam se ale bojí zavolat, protože tam na ní budou mluvit technicky. Gábi zase nemohla z home office od maminky pracovat, jak v práci slíbila, protože díky nestabilnímu spojení se nemohla dostat na firemní vépéenku. Nejdříve jsme diskutovali možnou změnu poskytovatele, kterou jsme ukončili s tím, že se na to nejdřív podívám. Sice je možné, že by se kvalita spojení zhoršila, ale o tak moc? Ještě před půl rokem bylo všechno v pořádku a běhalo jak mělo.

Po základním změření kvality signálu v různých částech bytu bylo jasné, že signál je rušen, protože i  blízkosti wifi routeru docházelo k častým výpadkům a v okolí v různých časových okamžicích bylo k dispozici deset různých wifi sítí. Takže bude asi nutné změnit kanál, na kterém wifi router pracuje. To by nebylo nic těžkého, kdyby ten technik, který instaloval tchýni wifi připojení, by se obtěžoval tím, že když už mění heslo pro přístup do konfigurace wifi routeru, tak jej taky uživateli zanechá. A nebo ještě lépe, celé nastavení někam napíše. Tchýně totiž disponovala jen listem papíru, kam jí dotyčný napsal název její sítě (ssid) a heslo. Což je teda dost málo.

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