[Cin] aw, we apparently missed more honest capture device

[Andrew Randrianasulu]

ср, 8 февр. 2023 г., 16:52 Terje J. Hanssen <terjejhanssen at gmail.com>:

>
>
> 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 at 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 <randrianasulu at gmail.com>:
>
>>
>> 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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