0x09

14 ms·

91.
by 0x09 13y ago
MPEG are currently in the exploration stage of two patent unencumbered video specs -- one based on baseline H.264 with patent grants, to be part of MPEG-4 (Web Video Coding), and another, its own standard (Internet Video Coding), based on
92.
by 0x09 13y ago
I thought it would be interesting to see how transmitting only the 251 (byte-size) highest-energy coefficients in the entire image would fare, which is somewhat of an idealization of the method used by the codecs in this comparison, but the
93.
by 0x09 13y ago
This is a good thread to bring this particular terminology into, because when I followed the links in the post to DLI to find out about the algorithm, I was greeted with a page containing no details, no specification, and links to a Windows
94.
by 0x09 13y ago
Neat! But the RSS link is a 404.
95.
by 0x09 13y ago
>C is so tiny that if you're going to write anything non-trivial you ... pretty much know exactly how you're going to write it from the start. Since C is so constrained it's very easy to design for, and you usually have a
96.
by 0x09 13y ago
>How would you weight a naive implementation of the DFT vs the FFT? Luckily he didn't specify the dimensional requirements, so we can get away with f^[0] = f[0].
97.
by 0x09 13y ago
The GNUstep Objective-C runtime actually supported ARC before Apple even shipped their implementation: http://etoileos.com/news/archive/2011/07/03/1215/
98.
by 0x09 13y ago
AVC/H.264, like many MPEG standards, has an official reference implementation: http://iphome.hhi.de/suehring/tml/
99.
by 0x09 13y ago
That is interesting. If true, it would be the first GNU/Linux derived OS to achieve UNIX(™) compatibility. Whether Linux distributions could trivially be made compatible has been a hypothetical debate so far ("nobody wants to pay
100.
by 0x09 13y ago
> what happens when it decreases the number of people who choose to get an education ... After all, the thought of perpetual poverty is a huge motivator It's also a catalyst for the kind of lifestyle that quickly stifles further edu
101.
by 0x09 13y ago
> Traditionally, these sorts of courses at MIT have used Matlab This is an incredibly good sign for hobbyists in a number of fields where Matlab completely dominates the research end of the spectrum. In the DSP realm the amount of exper
102.
by 0x09 13y ago
The mpv developers have written a really very good rundown of the current situation: https://github.com/mpv-player/mpv/wiki/FFmpeg-versus-Libav
103.
by 0x09 13y ago
A year ago, libav developers introduced a tool to translate a subset of C99 syntax in order to build libav with Visual Studio* . At the time Microsoft famously recommended that developers wanting modern C language features simply use C++ in
104.
Visual Studio now builds libav without C99-to-C89 translator(git.libav.org)
1 points by 0x09 13y ago|1 comments
105.
by 0x09 13y ago
> There are a lot of other analyses that clang does for you. If you clone the clang repository and go to lib/StaticAnalyzer/Checkers, you’ll see all the static checkers. You can get a list of these from clang with `clang -cc1 -
106.
by 0x09 13y ago
David Chisnall likes to point out that it actually passes more of its test suite on FreeBSD than on OS X. edit: thanks misframer
107.
by 0x09 13y ago
You want to be using a DCT rather than a DFT most of the time with content like this, in order to avoid those boundary artifacts. Compare with the example on the page http://i.imgur.com/wOVMwxx.png Source: I once maintained
108.
by 0x09 13y ago
There's a bit of a mischaracterization of the way 2 dimensional Fourier transforms operate on images in this post. The 2D DFT (or DCT rather) doesn't deal with anything as complex as tracing shapes on a 2D plane like seen in the v
109.
by 0x09 13y ago
An interesting aspect of this announcement is that it has the potential to cut into x264's bottom line. For several years now the authors have dual licensed the encoder under the GPL and a commercial license[1], meanwhile enjoying an u
110.
by 0x09 13y ago
It will be just another H.264 decoder and encoder, like in libavcodec and x264 respectively. It's actually pretty exciting since no competing (with x264) open source H.264 encoder ever managed to reach maturity. And it's licensed
111.
by 0x09 13y ago
You should try TotalSpaces. I can't speak for it, but it appears to replace the functionality lost from 10.6. For me Spaces in 10.5 and 10.6 is as good as any *nix WM and better than several due to the linear wrapping behavior (on a 2x
112.
by 0x09 13y ago
> Also C and C++ are both permitted to reorder structs, it's just that they don't because that's the easiest way to follow the standard. Is that feasible? Doing so would require that the order of the member addresses not
113.
by 0x09 13y ago
Spaces was part of 10.5 in 2007. Apple were late to the game, but not that late.
114.
by 0x09 13y ago
> Edit: Incorrectly thought fullscreen mode was introduced in Lion It was.
115.
by 0x09 13y ago
This is funny, I was fooling around with something really similar last week. The difference is rather than operating on a STFT spectrum, instead transform the whole signal, re-order the coefficients by folding from low to high in the desire
116.
by 0x09 13y ago
Unfortunately alpha-channel steganography is one of the simplest and most trivially detected of image steganography algorithms, making it not very useful. For an example of what goes into a serious and secure steganographic algorithm see pe
117.
by 0x09 13y ago
du just uses the fts API, so if you want something directly equivalent (omitting options and error handling) it was only barely too long to post: http://pastie.org/8315296 Compared to the equivalent find, code #1 is much fa
118.
by 0x09 13y ago
> This is how Microsoft is deprecating C on Windows nowadays, by leaving their C compiler at C90 level Actually they've recently gone back on that and are implementing c99 language[1] and standard library[2] features in an apparent
119.
by 0x09 13y ago
This is just being pedantic, but XNU is the name of the whole kernel, which describes the combination of Mach and the BSD interfaces.
120.
by 0x09 13y ago
If you are on a system with BSD stat like OS X you can get the same with function marks { (cd $MARKPATH && stat -f"%-10SN%SY" *) } Even better with column (t="$(printf "\t")"; cd $MARKP

More ›