512mb of Hidden Webcam Memory in Macbook Pros

Why not? Maybe it's for faster access, it's nand flash after all. I hate apple products too but come on, hidden NSA flash chips? Fuck off

Listen to this source of wisdom, goys. NSA is all in your head.

memmory always comes with cpu/mc and it probably have a DMA. Just like an ethernet controllers.

You don't need fast access to minutes of footage, webcams just stream stuff, there's only so much you actually need to buffer, why would you use more expensive storage?

Wow, and I thought I was a bit paranoid for blacklisting the kernel module used by my webcam (uvcvideo?)

512mb doesn't seem too unreasonable to buffer uncompressed 720p video.

According to toolstud.io/video/filesize.php?imagewidth=1280&imageheight=720&framerate=25&timeduration=60&timeunit=seconds, RAW RGB 3x8 bit video has a bitrate of 553Mbps.

That means that the memory is large enough to buffer just under 1 second of video.

Can anyone who knows more about videos confirm or deny whether this is accurate?

Is this bait, or why would you not worry that your freedoms are being infringed upon?

3 bytes per pixel, 1280*720 pixels per frame, 25 frames per second, so 3*1280*720*25 = 69120000 bytes ≈ 70 megabytes per second, or 560 megabits per second. Seems right.

CUCKINTOSH USERS LOSE HALF A GIG OF RAM TO WEBCAM FAGGOTRY

How can I do this?

Right, but most buffers (audio or video) don't store nearly that much. They don't store several seconds of content, and then try to write it to a file. They'll store a few frames, encode it, and then save it to a file as soon as possible. Of course, having a larger buffer doesn't hurt.

good luck getting that over my 10kbps internet connection

the NSA has classified video compression techniques. 10kbps is a lot

Nice try Shill.

That's under one second of raw footage, actually.

don't forget the teleportation device they plant on computers

Enough to buffer 22 full frames of video

So, less than 1 second of buffer, pack it up boys.

Have you all become stupid somehow? You can store 2+ hours of compressed 720p video on 512mb and way more if you lower the resolution.

Sure, but if it's on the webcam bus it isn't being compressed it's storing raw video before it gets processed

Also, look up the difference between raw, encoded and compressed video

You stop that.

I think people would notice if real time video encoding was happening all the time, your battery life would certainly not be one of the best on the market if you did that.

For the uncompressed video format mentioned ITT, it's actually about 7 seconds of video. Much larger than what is needed for a buffer. Of course, if someone were to store compressed video instead of uncompressed video in that RAM, then it could over an hour of content.

"Much larger than what is needed for a buffer" you don't seem to be backing this up, just asserting it. It may be storing it in nand to speed up editing for example, since it's not being read from disk but from a flash? It would only work for certain segments of video but I'm sure the kernel would have something to aid that and give the illusion of fluidity

Well you don't need HD video to spy on someone. Even 240P video can tell you where someone is and what they are doing. Hell, you don't even need video, with audio alone you can glean everything that someone has done in a day.

Personally, I think the spying angle is a bit far-fetched. They probably would have done a better job of hiding the chip in that case. But, the technical capacity is certainly there.

Which post mentioned it?

7 seconds is not "too much" for a buffer, do you understand how transfer from camera to PC works? It can't write directly to disk.

Anyway I'm doubting it's a video & audio buffer anyway, probably for something else

It's something I heard from a professor a while back.

Most camera manufacturers don't list the buffer size as one the specs on a camera, so I found a practical example instead.

If you refer to this device

fccid.io/pdf.php?id=1407559

you will see that the SDRAM referenced in the block diagram is that EM638165TS-5G chip, which is 64Mb (or 8MB) of SDRAM.

This is what I meant as the format

Precisely why you don't want to try saving 512MB of data all at once, you want to transfer what you have to disk as soon as possible. Obviously, you can't always rely on that if something else is being written at the same time, hence the existence of the cache in the first place.

The point is that if you're lowering the resolution that it's no longer 720p, in addition to that if you're lowering the resolution and spying on someone you're doing constant video processing, it's going to be noticeable via the battery life at the very least.

What that person is saying is like
that's not 100 then!

I wish someone would make a phone with an actual switch (not some app bullshit) that would physically cut the connection between the mics and cameras

Screwdriver and remove said parts, your laptop will just think they are broken/missing, then you remove the drivers as well

Also you lose your warranty

This thread is fucking awful.
The vast majority of the anons in this thread are fucking retarded.
Go read a fucking book, retards.

kek

People talk about video, but what about pictures?

No idea how it works, but I'll make an educated guess. Camera data is fed to the chip in parallel, chip feeds the data to the machine in a regular serial format. Makes sense, so it's solved

You're retarded as well. That does nothing to necessitate a 512MB memory chip.

Well surely it has to buffer more than one gram of video you spastic.

Tell me what it does mate, go on

Gram? I meant frame, dunno what happened there

It can buffer seven seconds, which is a bit much. I fucked up the calculations in because it's 512 megabytes, not 512 megabits.

The dude posted a follow up video just now:
youtube.com/watch?v=zYY3n4YWvFo

This IS the correct solution. What are you going to do if you suddenly need the webcam? Take the laptop apart and put it back on?

If an attacker can mount the module back on, that means he has root access, and by then you're already much more fucked than if they had just hacked your webcam.

it's enough to stream to the FBI

Even my casualfag friends cover their webcam, and they've been doing that before they met me.

I mean i get his points but thats just off topic. He just discovered this thing himself.

He's wrong about the light on the webcam not being disabled.

blog.erratasec.com/2013/12/how-to-disable-webcam-light-on-windows.html

Jesus fucking christ, I was hoping for a constructive discussion when I saw this thread's title but all I get is a bunch of tinfoil retards.

You're absolutely retarded JIDF

There's no discussion to be had otherwise. What would be the point of reporting the existence of a small memory chip then?

I don't know much about Macs so I was hoping to learn why is there 512mb of memory there. Is there other "hidden" memory? What could someone do with it? Is it accessible? But all I haven't gotten anything from this thread except shitposting.

Wait... That's actually a good idea, anyone know if there's a way to access it?

yee m8. louis is clickbaiting people, it's common for a camera to have it's own SDRAM chip. open up any digital camera it will have SDRAM, graphic processor chip and NAND storage.

sause: opening up camera found innawoods, lookuped chips after cleaning dirt off it.