Nikolai Longolius – Ideen aus der Cloud » Video

The day there were no news

admin — Fri, 21 Aug 2009 15:00:45 +0000

Thanks to Tim Pritlove for his Twitter-Link to http://rivva.de/404 – the 404 error site of rivva. This seems to be the original Video and I very much love the Idea.

Another beatbox :)

admin — Wed, 12 Aug 2009 15:38:15 +0000

Insane Beatbox – Beardyman – The funniest home videos are here

Amazing

admin — Tue, 28 Jul 2009 13:01:12 +0000

Insanely Talented Beat Boxing Kid – Watch today’s top amazing videos here

Miss Teen California

admin — Mon, 27 Jul 2009 14:57:42 +0000

Fundstück, again

admin — Thu, 23 Jul 2009 12:13:21 +0000

See more funny videos and funny pictures at CollegeHumor.

Fundstück

admin — Fri, 17 Jul 2009 08:51:16 +0000

How to handle interlaced video?

admin — Thu, 12 Mar 2009 13:53:30 +0000

Currently I am working in some projects, where there is broadcast TV material involved. As most people working with Video-Coding know the former TV video standart is interlaced. It doesn´t matter if the Video comes from pal or ntsc – the material is recorded and stored as 25 fps in pal (nearly 30 fps ntsc) – but each frame consists of 2 half frames. Where the 1st half frame has the lines (on the y axis) 1,3,5,7 etc and the 2nd half frame consists of the lines 2,4,6,8 etc. Phase alternating line = PAL.
So what have we got here? Calculating with square pixels PAL is a 768 × 576 resolution. But we never have the information of the full image because the two half frames (each 384 x 576) are recorded at a slightly different time. Thats why you can´t just add the two half frames to each other and get a full picture. If the camera takes a panshot of a landscape the two half frames don´t fit to each other. It´s like a puzzle. Thats why there are so many deinterlace filters out there.
What these filters try to accomplish is to generate a full image by guessing /blending / calculating the information between the 2 half frames. This works astonishing well with some filters and after the deinterlacing we´ve got a 25 fps full frame 768 x 756 movie.
Working with computers it is much more easy to handle progressive (full frame) material than half frame interlaced material. So if it comes to storage, there is a trend to store the progressive material digital on hard drives.
But heres the clou. It doesn´t matter at what quality the progressive material is stored. We lost some information. Motion information. Do you remember – when we started we had 50 fps material … now we got 25 fps material.
When it comes to fast motions (explosions, pans, anything) fps is the key to quality.
Thats why we´re using a bob deinterlace filter with double framerate settings. In this setup our deinterlacing filter is still calculating a full frame from the actual half frame. But the filter does this with every half frame so we don´t loose motion information.
Some older computers have a problem playing 50 fps Material, but this is going to change in the next years. When it comes to long time storage of material we wan´t to loose as less information as possible.

Mein Bruder macht Musik!

admin — Thu, 12 Feb 2009 16:13:50 +0000

Hey Leute! Endlich mal wieder was berichtenswertes. Mein Bruder hat ein neues Video im Netz. Eigentlich ist es sogar schon etwas länger auf youtube … aber da habe ich es nie gefunden und heute kam irgend so eine Facebook-Benachrichtigung. Is … Continue reading →

Amazon brings persistant Storage to EC2 … what next?

admin — Thu, 21 Aug 2008 16:37:51 +0000

As you might know, I am doing a lot of crazy things with Amazons EC2 Servers + their Storage (S3) … a lot of thinking goes into cheap scaleability for startups and in my case mostly scaling streaming video infrastructure.

The main problem so far working with ec2 instances was, that you couldn´t store data reliable on the running server, but had to use amazons s3 storage (or another server) instead. This results to scripting tons of half reliable backup + restore scripts … and all goes bad if you have to work with a relational database (eg mysql) … which made me go crazy concerning reliability of data.

Today amazon launched a service called elastic block store, which seems to solve all there problems. In the end block store is a mountable device which you can hang in any ec2 instance. The devices can hold up to 1TB of data and standart customers can create up to 20 devices …that sums up to 20TB of persistant storage.

I started testing today and i had some timeouts trying to sync s3 + persistant block storage using a ec2 instance – but in the end everything worked fine for me … next stop will be running mysql databases on this storage.

Unfortunately you can´t mount this persistant storage read only on more than one machine. So I´ve got to find another solution to this … but all in all this made my day

Laugh real loud!

admin — Tue, 26 Feb 2008 09:19:33 +0000

This is a youtube video i found using stumble upon. Man I don´t know how long I havent been laughing that long!