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  • - [Narrator] Do you notice anything off

  • in this animated video of a cooking grandmother?

  • - Notice the magic spoon that just randomly appears,

  • and then randomly disappears.

  • - [Narrator] Flaws like that

  • can help viewers spot AI generated videos from OpenAI.

  • It's new Text-to-video tool Sora

  • created all of these clips from scenic landscapes,

  • to bedazzled zoo animals without a major production studio

  • or team of animators.

  • - When you think about some of the most recent Pixar movies,

  • when you think about the amount of energy that they go into

  • to literally build every detail

  • so that their hair moves in the right way and things.

  • This stuff now,

  • is a computer doing without a single person.

  • - [Narrator] Users will be able to type in a prompt

  • and their words are brought to life, like this.

  • But such innovation has raised concerns

  • about the spread of misinformation.

  • So being able to detect AI in video

  • has become even more important.

  • We'll share some tips on how to spot AI videos,

  • and look at how this technology could be abused.

  • - The the funny thing about this,

  • if you really watch the runner,

  • aside from the fact they're going backwards

  • and moving in multiple directions,

  • if you watch how they're running,

  • you'll see that their physical body

  • is not matching the way a runner would run, right?

  • In other words, you'll see their arms doing a double take,

  • and that means their balance wouldn't work

  • and they wouldn't be able to function.

  • These are things that the AI still doesn't

  • understand about the physical world.

  • - [Narrator] That's Stephen Messer,

  • the co-founder of an AI sales company called Collectivei,

  • he's worked in the AI industry for more than a decade,

  • and now he's going to help show us how

  • to spot AI generated videos.

  • Let's consider this clip of a cat waking up its owner.

  • - Now, you look at this cat video, it is pretty amazing.

  • One, really cute cat,

  • but you probably notice that some of the physics, again,

  • are off right?

  • Where the user switches over and flips over,

  • the way the the sheet flips over is a little bit weird.

  • But if you look really closely

  • and if you use your skill,

  • you probably are noticing

  • something's a little bit weird about the cat.

  • There's two paws already out,

  • and from the middle of the cat,

  • a third paw magically appears.

  • These are examples of some of the places

  • where things just are a little bit off.

  • Again, always coming down to physics of the real world.

  • - [Narrator] And when the platform simulates people,

  • sometimes things may not feel quite right,

  • like with the cooking grandmother from earlier.

  • - So our senses are amazing at spotting weird things,

  • things that just don't feel right.

  • If you look at the hands and the way our movements work,

  • you'll notice that that is not how humans

  • move their fingers or their body.

  • - [Narrator] And then,

  • we have hyper realistic landscape shots like this one.

  • At first glance, this might look like drone footage

  • of the Amalfi Coast.

  • - Look at the waves.

  • The waves are going out, as opposed to in,

  • again, a physics problem that exists.

  • - [Narrator] And that's not all.

  • - The same thing with the stairwell.

  • Look, you can see stairwells that sort of lead to nothing,

  • stairwells that are all over the place

  • because it was asked for,

  • it's just throwing stairwells,

  • not in a way that physics would demand

  • for us to actually use them.

  • And so it's probably found in lots of videos,

  • different staircases, and it shoved them into the video.

  • - [Narrator] Sora can simulate historical footage too,

  • down to the grainy texture of an old film camera,

  • but when you look closer...

  • - You're gonna start to notice that there are houses

  • of all different generations that are there.

  • I would also point out

  • that if you notice in every western video you've ever seen,

  • they don't have streets where one horse goes one direction

  • and horses then come the other direction,

  • which is what you'll see here as if it's like a modern road.

  • - [Narrator] And here, sadly,

  • one of the horses melts into the ground mid shot.

  • OpenAI acknowledges the tool has some spatial issues

  • like in this scene set in Tokyo.

  • - [Stephen] If you watch the cars

  • going in the opposite direction,

  • when they go through the trees, they disappear.

  • - [Narrator] Animated scenes can make it more difficult

  • to tell if a video was created by AI.

  • - Look animations, you don't expect to be perfect.

  • In fact, part of the fun sometimes that they do things

  • that are physically impossible to do.

  • - [Narrator] Here, the AI tool Masters 3D geometry,

  • but there are still a few things that feel off.

  • - His eyes do not reflect the people in front of them,

  • which is actually something you would expect to see.

  • Fingers move in strange ways,

  • but again, these are characters.

  • Wiley Coyote runs into, you know,

  • a wall and runs through a truck.

  • So these are probably the areas

  • where you're gonna see a lot of usage in the beginning.

  • - [Narrator] In another clip of a paper coral reef,

  • the Generative AI shows more of a flare

  • for storytelling and Worldbuilding.

  • - Here what you're seeing is the level of creativity

  • that humanity can have when working with tools like this.

  • You can come up with almost any idea

  • that nobody would've ever thought of before,

  • and have such a high quality rendering.

  • I could see this being a movie

  • that nobody ever thought about before.

  • - [Narrator] Sora learned to create

  • these types of animated characters

  • from the data it was trained on.

  • In this case, licensed and open source video material.

  • But right now,

  • a number of lawsuits against OpenAI

  • hinge on the question of whether

  • publicly available copyrighted content

  • is fair game for AI training.

  • - I think mostly what you see is a content created world

  • seeing a new entity rise up

  • similar to the way Google did early on,

  • where they're making money

  • off the backs of other people's work.

  • And I think that's naturally gonna lead itself to lawsuits.

  • - [Narrator] Even though Sora

  • hasn't been publicly released yet,

  • some industry experts are already concerned

  • about its potential for misuse.

  • - Tools like this will be used for powerful misinformation.

  • There are bad actors

  • that will look to seek to take advantage of the fact

  • that a lot of people cannot spot these differences.

  • - [Narrator] OpenAI says it's taking actions

  • to get ready for the 2024 presidential election,

  • including prohibiting the use of its platforms

  • for political campaigning.

  • It's also developing tools

  • that can tell when a video was generated by Sora.

  • There are privacy concerns too.

  • - If it's been trained on video from the internet,

  • that means a lot of people

  • who've been in videos on the internet,

  • whether you uploaded your family holiday, et cetera,

  • could it in theory be used as these things progress.

  • - [Narrator] But when it comes to actual filmmaking,

  • experts say it will be a long time

  • before Text-to-video threatens medium.

  • Right now, the platform can only create clips

  • that are up to a minute long,

  • because the AI model won't respond

  • to similar prompts in the exact same way.

  • You couldn't combine 60 different one minute AI clips

  • into a coherent movie.

  • - So all of these models tend to what they call hallucinate.

  • They sort of go off the beaten path.

  • So the longer the video is,

  • the more likely it is to fall apart.

  • - [Narrator] But the tool could still transform

  • other short form content creator platforms.

  • - If you're someone who's up and coming,

  • and you think to yourself, I don't have the cash,

  • I can't get the skill, I don't have these people,

  • this becomes unbelievable democratizing to the world

  • and their ability to bring things to market.

  • - [Narrator] And video creators

  • have something else to get excited about.

  • OpenAI says Sora is also able to generate videos

  • from a single image.

  • This would seemingly allow people

  • to draw what's on their mind, and animate it to life.

  • - So when you think about that,

  • you realize we're still at the very early stages

  • of pretty powerful changes in the way videos are created.

  • (soft music)

- [Narrator] Do you notice anything off

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OpenAI’s Sora: How to Spot AI-Generated Videos | WSJ

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    林宜悉 發佈於 2024 年 02 月 24 日
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