#computers

Em uma madrugada qualquer, eu estava conversando com um amigo sobre coisas diversas do nosso dia, quando em algum momento entramos na conversa sobre computadores, e eu fiquei com uma curiosidade sobre qual seria o significado da abreviação "pc". Na manhã seguinte, eu fui atrás de pesquisar e descobrir qual era o significado da abreviação, e descobri que a palavra "pc" é a abreviação de "personal computer"(computador pessoal), tanto aos computadores de escritório (mesa), tanto os laptops e celulares.

[i3wm] Daily driver with a no-reload theme switcher (compatible with GTK & Qt)

Wallpaper: Scott Webb (light) · Harald Pliessnig(dark) GTK Theme: Adwaita / Adwaita-dark Icon Theme: Papirus Fonts: JetBrainsMono Nerd Font Other: conky · polybar · rofi · dunst · Alacritty — live theme switching driven by xsettingsd (no reload)

This guy on YouTube. Called Love Hulten. Making fun stuff. This thing gives me Gender envy

Speaking about this:

If you're curious how digital corrupted video looks like.

TW: IT'S A BIT FLASHY!!!

This is an x264 encoded video that I purposefully corrupted by trashing it hexademically in some places. You can clearly see glitches and frame dropouts. This is not an editing effect, this is an actual corruption that H.264 decoder tries to interpolate into image.

NERD TIME.

The reason why it looks the way it does is because H.264 (as well as MPEG, MPEG-2, VP8 and many many other codes) only saves every other frame. Frames between them are NOT saved, and instead it saves MOTION of those frames. The colors and edges of the frame may be the same, but moving, which is what H.264 saves. This is called motion compensation.

When we trash the bits of this video, we may trash two things:

I-frames, A.K.A. keyframes, which is THE frame that codec expects to rely on, if we trash it then the video becomes completely messed up until we reach another keyframe; can be seen near the end of this sample;

P-frames, A.K.A. predicted frame, is the frame that only contains information about motion and color differences from the last keyframe, if we corrupt it then the video only gets partially messed up, since we only ruin the differences, and we can still somewhat see what's going on; can be seen throughout the entire sample.

There's also a third type not featured in this sample.

🍀step 1 : back up your stuff

psa to always back up your stuff at least monthly or quarterly, even if it takes hours or days. you never know when your desktop's gonna crash out or brick itself. there was one time when my 15-year-old self's laptop just never turned on again. i hadn't backed up my files, so i broke down for a week.

also no, switching to linux isn't gonna brick your desktop. although, it is a canon event for almost everyone to lose your files when switching.