[{"data":1,"prerenderedAt":474},["ShallowReactive",2],{"project-43785044":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":9,"maker":10,"posted_at":11,"year":12,"points":13,"comments":14,"rank_in_year":15,"shown_in_year":16,"top":17,"tier":18,"category":19,"subcategory":20,"format":21,"keywords":22,"reception":27,"sentiment":28,"stance_mix":29,"scored_comments":34,"aspects":35,"strip":47,"post_text":48,"what":49,"said":84,"maker_in_thread":207,"shape":217,"grid":221,"attempts":435,"same_week":436,"maker_shows":32,"maker_hidden":465,"reader_version":466,"card":467},"43785044","Lemon Slice Live","Have a video call with a transformer model","title","Show HN: Lemon Slice Live – Have a video call with a transformer model",null,"lcolucci",1745514614,2025,195,84,340,3837,9,"notable","ai","video avatar generation","web_app",[23,24,25,26],"talking avatar","diffusion transformer","real-time video generation","video chat avatar","curious",0.267,{"positive":30,"neutral":31,"mixed":32,"critical":33},19,35,3,5,62,{"execution":36,"performance":39,"idea":41,"pricing":42,"design":44,"privacy":45,"docs":46},{"positive":37,"critical":38},4,0,{"positive":40,"critical":40},2,{"positive":40,"critical":38},{"positive":43,"critical":38},1,{"positive":32,"critical":40},{"positive":38,"critical":43},{"positive":38,"critical":38},[32,33,32,32,32,32,38,32,33,38,43,33,33,32,32,43,33,33,32,37,33,33,32,38,32,33,33,33,38,37,33,43,33,43,32,33,32,32,33,43],"Hey HN, this is Lina, Andrew, and Sidney from Lemon Slice. We’ve trained a custom diffusion transformer (DiT) model that achieves video streaming at 25fps and wrapped it into a demo that allows anyone to turn a photo into a real-time, talking avatar. Here’s an example conversation from co-founder Andrew: https:\u002F\u002Fwww.youtube.com\u002Fwatch?v=CeYp5xQMFZY. Try it for yourself at: https:\u002F\u002Flemonslice.com\u002Flive.\n\n(Btw, we used to be called Infinity AI and did a Show HN under that name last year: https:\u002F\u002Fnews.ycombinator.com\u002Fitem?id=41467704.)\n\nUnlike existing avatar video chat platforms like HeyGen, Tolan",{"problem":50,"audience":9,"pricing":9,"motivation":9,"time_to_build":9,"stack":56,"openness":81,"stage":82,"team_size":83},{"value":51,"source":52,"evidence":53},"Lets users video-call a custom character created from one uploaded image without training or rigging","maker",[54],{"id":55},"post",[57,61,65,73,77],{"value":58,"source":52,"evidence":59},"Diffusion transformer (DiT) video model",[60],{"id":55},{"value":62,"source":52,"evidence":63},"Deepgram for voice transcription",[64],{"id":55},{"value":66,"source":67,"evidence":68},"Modal for GPU compute","commenter",[69],{"id":70,"by":71,"text":72},"43785476","sid-the-kid","Yes. We use Modal (https:\u002F\u002Fmodal.com\u002F), and are big fans of them. They are very ergonomic for development, and allow us to request GPU instances on demand. Currently, we are…",{"value":74,"source":52,"evidence":75},"Daily.co and Pipecat for streaming pipeline",[76],{"id":55},{"value":78,"source":67,"evidence":79},"NVIDIA A100 GPUs",[80],{"id":70,"by":71,"text":72},"unknown","launched","team",{"praise":85,"objections":112,"requests":144,"questions":171,"alternatives":187},[86,101],{"value":87,"source":67,"evidence":88},"Real-time video chat feels impressively natural",[89,93,97],{"id":90,"by":91,"text":92},"43788774","zebomon","This is impressive. The video chat works well. It is just a hair away from a very comfortable conversation. I'm excited to see where you have it a year from now, if it turns out…",{"id":94,"by":95,"text":96},"43790522","wouterjanl","Really cool stuff. It felt strangely real. Impressive!",{"id":98,"by":99,"text":100},"43785583","lostmsu","This is very impressive. Any details about model architecture and size? Input and output representation? How does voice work? You mentioned Deepgram. Does it mean you do…",{"value":102,"source":67,"evidence":103},"Fun demo with well-known characters",[104,108],{"id":105,"by":106,"text":107},"43801737","anishsikka","this was overall fun. better than expected. i'm an office fan so tried dwight and michael scott. i hope you folks get better at this. excited to see where you get in the next 12…",{"id":109,"by":110,"text":111},"43787508","aorloff","Max Headroom lives !",[113,118,129,140],{"value":114,"source":52,"evidence":115},"Latency of 3-6 seconds makes conversation awkward",[116,117],{"id":55},{"id":90,"by":91,"text":92},{"value":119,"source":67,"evidence":120},"Email signup wall before trying the demo",[121,125],{"id":122,"by":123,"text":124},"43785225","tetris11","If you could lower the email signup for a few hours, that'd be nice. I'm not going to sign up for yet another service I'm unsure about.",{"id":126,"by":127,"text":128},"43785203","doublerabbit","\"Try it now live\" and then request me to enter my email. I'll pass thanks.",{"value":130,"source":67,"evidence":131},"Use of copyrighted characters raises IP concerns",[132,136],{"id":133,"by":134,"text":135},"43793653","mentalgear","So basically the old open-source live-portrait hooked up with audio output. Was very glitchy and low res on my side. btw: Wondering if it's legal to use characters you don't have…",{"id":137,"by":138,"text":139},"43788814","andrewstuart","A really compelling experience. It seems clumsy to use copyrighted characters in your demos. Seems to me this will be a standard way to interact with LLMs and even companies -…",{"value":141,"source":67,"evidence":142},"Low resolution and glitchy output",[143],{"id":133,"by":134,"text":135},[145,154,161],{"value":146,"source":67,"evidence":147},"Faster response latency",[148,151],{"id":149,"by":71,"text":150},"43786072","Glad you like it! IMO, biggest things to improve on are 1) time to video response and 2) being able to generate more complicated videos (2 people talking to each other, a person…",{"id":152,"by":10,"text":153},"43789112","Thank you! Very much agree that we need to improve speed to make the conversation more comfortable. Our target is \u003C2sec latency (as measured by time to first byte). The other…",{"value":155,"source":67,"evidence":156},"Web embeddable version",[157],{"id":158,"by":159,"text":160},"43793909","o_____________o","Are you going to offer a web embeddable version of the Live offering?",{"value":162,"source":67,"evidence":163},"API access",[164,168],{"id":165,"by":166,"text":167},"43789756","ashishact","This is just brilliant. Hope you succeed, so that eventually I get an API to play with.",{"id":169,"by":71,"text":170},"43785913","Nice! Thanks for sharing. I hadn't seen that paper before. Looks like they take in a real-world video and then re-generate the mouth to get to lip synch. In our solution, we take…",[172,176],{"value":173,"source":67,"evidence":174},"Model architecture and size",[175],{"id":98,"by":99,"text":100},{"value":177,"source":67,"evidence":178},"Cost of GPU inference",[179,183],{"id":180,"by":181,"text":182},"43787833","dheera","Nice! What infra do you use for inference? I'm wondering what the cost-effective platforms are for projects like this. GPUs on AWS and Azure are incredibly expensive for personal…",{"id":184,"by":185,"text":186},"43785824","ivape","How much would this demo cost you from the HN traffic if you don't mind me asking?",[188,192,196,203],{"value":189,"source":52,"evidence":190},"HeyGen",[191],{"id":55},{"value":193,"source":52,"evidence":194},"Tolan",[195],{"id":55},{"value":197,"source":67,"evidence":198},"character.ai",[199],{"id":200,"by":201,"text":202},"43819708","snappyleads","Hey, I tried this and enjoyed using the demo - looks really cool! Just curious how it compares to what character.ai recently put out as well",{"value":204,"source":67,"evidence":205},"LivePortrait",[206],{"id":133,"by":134,"text":135},{"comments":208,"answered":32,"key":209},7,[210,211,214],{"id":152,"text":153},{"id":212,"text":213},"43785561","haha this is amazing! Just made him a featured character. Folks can chat with him by searching for \"Devil\"",{"id":215,"text":216},"43785649","thank you! We have an architecture diagram and some more details in the tech report here: https:\u002F\u002Flemonslice.com\u002Flive\u002Ftechnical-report And yes, exactly. In between each character…",{"commenters":218,"max_depth":219,"maker_replies":208,"first_comment_mins":32,"lifespan_hours":220},37,8,131,[222,226,230,232,234,238,240,243,245,247,249,252,256,259,261,263,265,268,271,273,275,279,282,285,287,290,294,296,299,301,304,306,309,312,315,317,320,322,324,329,331,333,335,339,341,343,345,348,351,353,355,357,359,361,364,366,369,371,373,375,377,380,382,385,388,393,396,399,401,403,404,406,408,411,412,414,416,418,420,422,425,428,430,433],[223,38,32,224,225,38],"43791567","project\u002Fmixed\u002Fexecution","djaychela",[227,38,32,228,229,38],"43794671","maker\u002Fneutral\u002Fnone","andrew-w",[90,43,33,231,91,38],"project\u002Fpositive\u002Fperformance",[152,43,38,233,10,43],"maker\u002Fneutral\u002Fperformance",[235,40,32,236,237,38],"43785494","project\u002Fneutral\u002Fnone","dang",[212,40,38,239,10,43],"maker\u002Fpositive\u002Fnone",[241,32,32,236,242,38],"43785850","srameshc",[169,32,32,244,71,38],"project\u002Fneutral\u002Fidea",[98,37,32,246,99,38],"project\u002Fneutral\u002Fexecution",[215,37,38,248,10,43],"maker\u002Fneutral\u002Fexecution",[250,37,32,251,71,38],"43785854","project\u002Fneutral\u002Fperformance",[253,37,38,254,255,38],"43786281","other\u002Fneutral\u002Fnone","tough",[257,37,38,258,71,38],"43786406","other\u002Fneutral\u002Fperformance",[260,37,38,254,255,38],"43786675",[180,37,32,262,181,38],"project\u002Fneutral\u002Fpricing",[264,37,32,262,71,38],"43787933",[266,37,38,254,267,38],"43788029","tony_cannistra",[269,33,33,231,270,38],"43786442","gitroom",[272,33,38,228,10,43],"43786716",[274,33,38,254,71,38],"43786733",[276,33,38,277,278,38],"43791763","other\u002Fneutral\u002Fpricing","genewitch",[133,280,43,281,134,38],6,"project\u002Fcritical\u002Fperformance",[283,280,38,254,284,38],"43793848","pjc50",[286,280,32,244,229,38],"43793924",[288,280,33,289,229,38],"43794006","project\u002Fpositive\u002Fdesign",[291,208,33,292,293,38],"43792612","maker\u002Fpositive\u002Fidea","bsenftner",[295,208,32,228,229,38],"43794856",[297,219,32,251,298,38],"43785070","bigyabai",[300,219,38,233,10,43],"43785113",[302,17,32,224,303,38],"43787500","elternal_love",[305,17,32,248,229,38],"43787591",[307,17,43,308,278,38],"43791771","project\u002Fcritical\u002Fprivacy",[310,17,38,254,311,38],"43792020","netdevphoenix",[165,313,33,314,166,38],10,"project\u002Fpositive\u002Fnone",[316,313,32,228,229,38],"43794929",[137,318,32,319,138,38],11,"project\u002Fmixed\u002Fidea",[200,321,33,314,201,38],12,[323,321,32,228,229,38],"43841316",[325,326,32,327,328,38],"43791402",13,"project\u002Fneutral\u002Fdesign","NoScopeNinja",[330,326,32,327,229,38],"43795401",[94,332,33,314,95,38],14,[334,332,32,233,229,38],"43794965",[336,337,33,314,338,38],"43786645",15,"benob",[340,337,38,228,10,43],"43786763",[105,342,33,314,106,38],16,[344,342,32,228,229,38],"43807956",[346,347,32,251,71,38],"43785970",17,[349,347,38,254,350,38],"43785993","PUSH_AX",[352,347,38,254,71,38],"43786088",[354,347,38,228,10,43],"43786737",[356,347,32,228,71,38],"43786033",[158,358,32,244,159,38],18,[360,358,32,228,229,38],"43794900",[362,358,33,363,159,38],"43796433","project\u002Fpositive\u002Fpricing",[365,358,32,228,229,38],"43796689",[367,30,33,314,368,38],"43792958","inhumantsar",[370,30,33,314,229,38],"43793709",[109,372,33,289,110,38],20,[374,372,38,254,71,38],"43787663",[376,372,38,254,71,38],"43787727",[378,372,32,379,110,38],"43799785","project\u002Fneutral\u002Fdocs",[381,372,32,236,229,38],"43787824",[383,372,33,289,384,38],"43788799","consumer451",[386,372,33,387,110,38],"43799783","maker\u002Fpositive\u002Fexecution",[389,390,33,391,392,38],"43796044",21,"project\u002Fpositive\u002Fexecution","movedx01",[394,390,38,395,229,38],"43796244","commenter\u002Fneutral\u002Fnone",[122,397,43,398,123,38],22,"project\u002Fcritical\u002Fdesign",[400,397,32,327,71,38],"43785315",[402,397,33,391,123,38],"43785908",[149,397,32,251,71,38],[126,405,43,398,127,38],23,[407,405,32,262,71,38],"43785301",[409,405,32,233,410,38],"43785426","yahoozoo",[70,405,33,387,71,38],[413,405,32,262,99,38],"43785692",[415,405,32,262,255,38],"43786398",[184,405,32,417,185,38],"maker\u002Fneutral\u002Fpricing",[419,405,32,262,71,38],"43786053",[421,405,32,244,255,38],"43786387",[423,405,33,424,71,38],"43787788","project\u002Fpositive\u002Fidea",[426,405,38,427,255,38],"43787965","other\u002Fneutral\u002Fidea",[429,405,38,427,284,38],"43793871",[431,405,43,281,432,38],"43785985","sgrove",[434,405,32,251,229,38],"43786073",[],[437,442,447,452,457,461],{"id":438,"name":439,"points":440,"category":441},"43820228","PyXL",983,"hardware",{"id":443,"name":444,"points":445,"category":446},"43803148","RetrOS-32",575,"infrastructure",{"id":448,"name":449,"points":450,"category":451},"43816419","screenrecorder.me",462,"dev_tools",{"id":453,"name":454,"points":455,"category":456},"43835584","Beatsync",439,"creative",{"id":458,"name":459,"points":460,"category":446},"43778081","TacOS",320,{"id":462,"name":463,"points":464,"category":456},"43791992","Clever 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