ср, 8 февр. 2023 г., 16:52 Terje J. Hanssen <[email protected]>:
> > > Den 08.02.2023 03:46, skrev Andrew Randrianasulu: > > https://www.avaccess.com/products/4kvc00/ > > it exist, just not (yet?) in Europe ... > > > 4KVC00, interesting model worth to have a closer look at. And it seemingly > is available or at least prices in Europe for €71.99 > https://www.avaccess.com/eu/products/4kvc00/ > > If it has better cost/performance than other similar UVC v4L2 models, I > don't know. > Looking at its tech specs, it has color precision > Deep Color 4K@60Hz: Up to 8bit > > Not really fair comparable with the "not so unexpensive" standalone SSD > recorder (BMD Hyperdeck Shuttle 2 > > https://www.bhphotovideo.com/c/product/841023-REG/Blackmagic_Design_HYPERD_PT2_HyperDeck_Shuttle_2_SSD.html/specs > Color Precision 10-bit > Video Sampling 4:2:2 > > And not to forget the 8-Bit vs 10-Bit Video Color Explained > (thousands/banding vs millions): > > https://fujifilm-x.com/en-us/series/the-filmmakers-handbook/8-bit-or-10-bit-video-color-explained/ > > yeah, with 19x diff in price you left to wonder if 10bit video path just *that* much expensive, or they charge because they can .... a bit of a look inside some of those devices, not really open down to fpga (?), but still you can look at firmware ... https://hackaday.com/2022/10/14/an-open-source-hdmi-capture-card/ look at github link from there, it definitely list usb 3.0 yuv at usable framerates, but for usb 2.0 this slows down to exactly 5/10 fps ... > > > ср, 8 февр. 2023 г., 05:19 Andrew Randrianasulu <[email protected]>: > >> >> https://www.amazon.com/gp/aw/d/B08MPPKZ55/ref=cm_cr_srp_mb_bdcrb_top?ie=UTF8 >> >> >> 4KVC00 from "V AV access" >> >> in reviews >> >> ==== >> A true YUY2, USB 3.0 capture card capable of 1080p 60fps! >> Reviewed in the United States on June 7, 2021 >> For the price, this thing is awesome. It's actually USB 3.0 (instead of >> just a fake blue connector) and is capable of delivering raw 1080p60 video >> for capture! I've been looking around for a good 1080p60 capture card for >> my Nintendo Switch, and this fits the bill quite nicely, as the loop-out >> keeps the gaming 'competitive' while the capture looks great. >> >> Pros: >> - Really captures at 1080p 60fps, and delivers sharp images (instead of >> blurrier 30fps ones you'll find on cheap USB 2.0 MJPEG-based capture >> cards). YUY2 (the video format) is chroma subsampled though, which means >> that really small text may have a bit of discoloration, but for games it's >> not really an issue. >> - Low latency capture (at least from what I can tell in OBS preview) >> - Loop out (yay) >> - Works with Linux as a simple V4L2 capture device >> - Sound is nicely in sync >> - Price (I got it for like ~$40 or so, and haven't found anything this >> good at this price point - heck, it outclasses my AverMedia Live Gamer Mini >> I bought used at $60) >> ==== >> >> aja and other stuff cost ... *much* more. >> >> >> https://www.aja.com/products/u-tap-hdmi >> >> 439$ >> >> >> https://www.amx.com/en/products/uvc1-4k >> >> even costlier, 800+! >> >> Anyway, in all cases cable (usb) might be limiting factor, too? >> >> I really hope this HAMA device actually just was plugged in wrong port or >> via wrong cable, otherwise I think it will be wise to replace it with >> something else (sadly cheap-end devices may change their guts without >> changing appearance, so ...russian roulette!) >> > >
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