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  • adamraudonis · 4 days ago

    See repo for prompt. Feel free to contribute to format or benchmarking. MIT Open Source.

    • diimdeep · 4 days ago

      Publish full session md, you can export them with `uvx claude-code-log@latest --tui`

      • tjuene · 4 days ago

        warning: don't just run random commands in your terminal

        • thehamkercat · 4 days ago

          specially not npm/python related packages with @latest

          Yes please give me the latest supply-chain attacks.

          • fragmede · 4 days ago

            too late, I already ran curl | sudo bash

          • reassess_blind · 4 days ago

            Somehow that feels too private to want to share.

          • noosphr · 4 days ago

            Software created by algorithms is public domain.

            • consensus1 · 4 days ago

              MIT license is basically that

              • noosphr · 3 days ago

                It isn't.

            • Lucasoato · 4 days ago

              Doesn’t with for me, iOS Safari :/

              • nomel · 4 days ago

                Works on my old iPhone. The video is a splat. Click the interact button to change perspective.

                • LudwigNagasena · 4 days ago

                  Moving camera completely distorts the video both on my Mac and iPhone.

                • oldsecondhand · 4 days ago

                  Me neither on Chrome on Win10. "WEBGPU initialization failed".

                  • skybrian · 4 days ago

                    Works on my iPad using Chrome or Safari.

                    • filoleg · 4 days ago

                      Safari on iPhone, working as intended for me as well.

                      • adamraudonis · 3 days ago

                        I think I fixed this. Please try again :)

                        • filoleg · 2 days ago

                          Try what? My earlier comment said that it was working just fine for me on mobile Safari.

                    • ncr100 · 3 days ago

                      It's working on Android Chrome browser

                      • adamraudonis · 3 days ago

                        The viewer uses WebGPU... I could support WebGL for greater compatibility.

                      • mistahchris · 4 days ago

                        wow… this is seriously cool.

                        • gcr · 4 days ago

                          Something’s way off with these numbers. The page says it encodes video at 640MB/s which is quite large even for 4D data and doesn’t match the filesize of the demo splat (7.4MB / 2sec, or ≈3.4MB/s).

                          In fact they say the raw file size of the demo splat was only 427MB, so maybe the 640MB/s was a statement about encode speed? Why write it that way instead of “this demo splat was encoded in 0.6sec” or even just “the time to produce the original splat took longer than the time to encode this video format”?

                          • danielheath · 4 days ago

                            “encodes video at 640MB/s” is the common way for codec authors to talk about performance

                          • delichon · 4 days ago

                            A gaussian gif. Coming to porn sites soon. The file format name works for them. But imagine whole movies shot in this format. The fly-on-the-wall fantasy of movies, without being locked in place for the whole shot. Narrative possibilities like being able to examine just how close the Tyrannosaurus Rex is to your rear view mirror. Clues in a mystery only visible on rotation. Hidden bonus scenes.

                            I hope this catches on just to be able to watch the evolution of cameras to capture it.

                            • andybak · 4 days ago

                              Ok but you're commenting on the general concept of animated gaussian splats. That's existed for a while and it's unrelated to what this actual post is about which is a new compression method.

                              • delichon · 4 days ago

                                I suppose it's the difficulty in recording them rather than the file size that has kept them experimental. But that's not a problem for AI generated splats. GenAI sites could have a toggle from image to video to splat4d.

                              • orbital-decay · 4 days ago

                                >imagine whole movies shot in this format. The fly-on-the-wall fantasy of movies, without being locked in place for the whole shot.

                                That would be terrible. Framing is the major expressive feature in cinematography, and any interactive format needs a lot more thought put into it than just having a free camera. Literally the worst of both worlds.

                                Light field video streaming is a thing, however it's pretty niche. OTOY pioneered holographic codecs and light field videos with some degree of freedom and a sense of depth more than a decade ago.

                                • jayd16 · 4 days ago

                                  Not terrible, per se, but not a movie. There are other formats that fit the task better like immersive theater and theater in the round.

                                  This has been extensively explored with VR and games, though.

                                  • NuclearPM · 4 days ago

                                    The “per se” is never necessary.

                                    • Chaosvex · 4 days ago

                                      I don't think their writing is supposed to be an exercise in saving bytes. Per se.

                                      • spudlyo · 4 days ago

                                        It's less bytes than "intrinsically" or "by itself", so not bad, per se.

                                  • skybrian · 4 days ago

                                    It wouldn't work for a movie, but it might be good for a concert video, stage play, dance, or sports, where you're capturing something happening in a defined space. You could pick a different seat in an auditorium.

                                    Also consider connecting a virtual space with a real one, so it looks like something happening on a virtual stage that's connected to a room in your house.

                                  • jfim · 4 days ago

                                    That already exists though. I believe Braindance VR uses a rig with a couple dozen cameras to capture the same scene from multiple viewpoints then converts it to a gaussian splat that can be walked around.

                                    • hoppp · 4 days ago

                                      Its great for porn for those videos when the camera seems to be focused on the actors balls when thats definitely not the part I want to be looking at. I can just look around the room instead.

                                      • lwansbrough · 4 days ago

                                        A$AP Rocky did it for a music video. Granted, it was only used for the editing process and not the final video, but it still presents some interesting opportunities, though it doesn't really look real so the applications may be limited.

                                        https://radiancefields.com/a-ap-rocky-releases-helicopter-mu...

                                        • braebo · 3 days ago

                                          So a video game?

                                          • delichon · 2 days ago

                                            A video game playthrough in a file, game not needed.

                                          • BretonForearm · 4 days ago

                                            spatiotemporal data

                                            • noosphr · 4 days ago

                                              Well there's your problem, you didn't say you wasted a million dollars doing something an expert can do in an afternoon.

                                              • anon7000 · 3 days ago

                                                I mean it’s probably in the training data too

                                              • sulam · 3 days ago

                                                Wow dude. That is a hell of a README. Great job!

                                                • IanCal · 3 days ago

                                                  Admittedly just scanned this but that’s lossless, right?

                                                  • dwohnitmok · 3 days ago

                                                    Do you know what kind of compression ratios you get out of curiosity? Presumably it would be lower than this format (because this format is meant to be lossy not lossless) but very curious as a baseline.

                                                    • beAbU · 3 days ago

                                                      Your readme is really mobile unfriendly, FYI

                                                    • ACCount37 · 4 days ago

                                                      Does switching scenes in the demo work for anyone? There are what, 3 hidden panels in the HTML there? But none of them have a "switch scenes" button.

                                                      • reassess_blind · 4 days ago

                                                        Whats the 4 in the "4D" here? A layman like me thinks this looks 3D.

                                                        • jasonjmcghee · 4 days ago

                                                          time

                                                          • reassess_blind · 4 days ago

                                                            Why is it we don't call videogames "4D" if they also operate through time?

                                                            • dietr1ch · 4 days ago

                                                              I guess if moving through time other than forward like normal it'd justify calling time a new dimension on which you can play on.

                                                              Otherwise, we just focus on the 3D space they represent and take time for granted

                                                              • jasonjmcghee · 4 days ago

                                                                3D Gaussian splats are still images of 3D space / photogrammetry

                                                                So I'm guessing it came from representing the additional dimension

                                                                • dullcrisp · 4 days ago

                                                                  Animations are four-dimensional. Colored animations are seven-dimensional. More if they include surface normals or lighting information. Simple.

                                                            • chmod775 · 4 days ago

                                                              The application is cool, but there is little novelty here. All of the employed techniques are well-established.

                                                              I suggest removing "novel" from the title unless you wish to seriously disappoint some people.

                                                              • AaronAPU · 4 days ago

                                                                But that’s exactly where we’re at. Disappointment is fine, attention is all you need.

                                                                • adamraudonis · 3 days ago

                                                                  I tried to apply existing mp4 H265 like compression to 3D splats. Do you have any links to other 4D splat formats?

                                                                  • refulgentis · 4 days ago

                                                                    Looks like crap, is it the format?

                                                                    • StilesCrisis · 4 days ago

                                                                      I'm so tired of HN putting sites on the top with zero human authorship. I have to listen to Claude-voice enough at my job.

                                                                      • zamalek · 3 days ago

                                                                        > a splat is static iff a single quantized value

                                                                        What is up with LLMs and "iff"?

                                                                        • _0ffh · 3 days ago

                                                                          Well, iff is a useful abbreviation. I use it in personal notes at least, and would use it more often if I thought it was more widely understood.