Find a font using an image
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Salakhutdinov agrees that that’s likely, based on the unusually smooth appearance of the output and on some of the generated “camera” angles. OpenAI says it relied on licensed and publicly available video content for training some computer scientists speculate that OpenAI may have also used synthetic data generated by video game design programs such as Unreal Engine. But experts including Park and Salakhutdinov agree the model’s capabilities result from massive amounts of training data and many billions of program parameters running on lots of computing power. OpenAI hasn’t released much information about Sora’s development or training, and the company declined to respond to most of Scientific American’s questions. Google’s Lumiere and many other models work in a similar way. The main difference between Sora and an image generator is that instead of encoding text into still pixels, it translates words into temporal-spatial blocks that, together, compose a complete clip. Using an iterative process of removing visual noise from video clips, developers trained Sora to produce outputs from text prompts. More technically, Sora is a diffusion model (like many other image-generating AI tools), with a transformer encoding system resembling ChatGPT’s. In basic terms, Sora is a very large computer program trained to associate text captions with corresponding video content. It’s “not necessarily novel,” Salakhutdinov agrees. They just scaled it up on larger data and models,” Park says. “Their algorithm is almost identical to existing methods. But despite its capabilities, Sora does not represent a significant leap in machine-learning technique as such. This is no mean feat previous GAI tools have struggled to maintain consistency between video frames, let alone between prompts. Sora generates videos up to 60 seconds long, and OpenAI says users can extend that by asking the tool to create additional clips in sequence. And they loom as probable amplifiers of digital disinformation. Sora and similar tools threaten millions of people’s livelihoods in many creative fields. Sora’s emergence signals just how rapidly certain AI advances are being made, fueled by billions of dollars in investment-and this breakneck pace is also accelerating concerns about societal consequences. Sora, he says, is “certainly pretty impressive.” Salakhutdinov has previously developed other methods of machine-learning-based video generation. Ruslan Salakhutdinov, a computer science professor at Carnegie Mellon University, was also “a bit surprised” by Sora’s quality and capabilities.
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“I didn’t expect video generators to improve this fast, and the quality of Sora completely exceeded my expectations,” he says now. Seven months ago Park had told Scientific American that he thought AI models capable of producing photorealistic video from text alone were far-off, requiring a major technological leap. Park develops generative three-dimensional modeling techniques using machine-learning methods. “ are very surprised to see the level of quality shown by Sora,” says Jeong Joon Park, an assistant professor of electrical engineering and computer science at University of Michigan. In terms of the duration and realism of its output, Sora represents the latest in what’s possible in AI-generated video. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today. If you're enjoying this article, consider supporting our award-winning journalism by subscribing. But OpenAI has shared a few dozen sample videos generated by the new tool in an announcement blog post, a brief technical report and CEO and founder Sam Altman’s profile on X (formerly Twitter). The company says it’s currently limiting access to a select group of artists and “red-team” hackers who are testing the generator for beneficial uses and harmful applications, respectively. OpenAI announced Sora on February 15 but hasn’t yet released it to the public. Give Sora a simple still image or a brief written prompt and it can produce up to a minute of startlingly realistic video-in what has been described as the time it takes to go out for a burrito. Beyond the screen, the woman doesn’t exist, and neither does the street.Įverything in the video was created by OpenAI’s new text-to-video tool, Sora, the latest generative artificial intelligence (GAI) widget from the company behind Dall-E and ChatGPT. In fact, it’s not footage of anything real. But it’s not a recording for a TV spot or music video. Her dress and gold hoop earrings sway with each step.
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At first glance, the clip looks like footage from a music video or an ad for a stylish car: a woman in sunglasses strides down a city street at night, surrounded by pedestrians and brightly lit signs.