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<div class="moz-cite-prefix">Den 12.02.2023 23:34, skrev Andrew
Randrianasulu:<br>
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cite="mid:CA+rFky45ScvpXFL4vYPPh-STvdmezz476=bu_ti7Ox24xJDKRQ@mail.gmail.com">
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<div dir="ltr" class="gmail_attr">пн, 13 февр. 2023 г.,
01:15 Terje J. Hanssen <<a
href="mailto:terjejhanssen@gmail.com"
moz-do-not-send="true" class="moz-txt-link-freetext">terjejhanssen@gmail.com</a>>:<br>
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<div>Den 08.02.2023 21:05, skrev Andrew Randrianasulu:<br>
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<div dir="auto"><a
href="https://www.cnx-software.com/2022/11/07/ms2130-based-4k-hdmi-to-usb-3-0-video-capture-dongle-sells-for-19/"
rel="noreferrer noreferrer" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.cnx-software.com/2022/11/07/ms2130-based-4k-hdmi-to-usb-3-0-video-capture-dongle-sells-for-19/</a>
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<div dir="auto">"I learned about the video capture
dongle via <a
href="https://twitter.com/MateuszStarzak/status/1589595781971181568"
target="_blank" rel="noreferrer"
moz-do-not-send="true">Mateusz Starzak</a> who
purchased a sample <a
href="https://s.click.aliexpress.com/e/_Dd6uEUB"
target="_blank" rel="noreferrer"
moz-do-not-send="true">on Aliexpress</a> and
confirmed support for uncompressed YUV @ 1080p60.
He also mentioned the latency to be around 6 to 11
frames depending on the resolution with 720p input
to 720p output only looking slightly faster than
1080p input to 1080p output."</div>
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<br>
My tests with the return-object Hama ms2109 uncovered it
failed on FHD video due to unuseable 5 fps, while it
managed 422 subsampling and 8-bit color depth.<br>
<br>
I mentioned I have ms2130 in order, yes.<br>
<br>
Reading from the ms2130 specs:<br>
<br>
Support input resolution up to 4K@30Hz;<br>
Support output resolution up to 1080P@60Hz YUY2;<br>
Support 24/30/36bit Deep color;<br>
<br>
<br>
The different way to specify color depth/color
precision/bit depth: 8-bits or 10-bits is confusing.<br>
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<div dir="auto">I think they refer to *input* side of equation,
i.e. what type of hdmi signal it can eat .... what comes out
of other end .... we will hopefully see!</div>
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Yep, of course you're right. The info above was from the sellers
(seemingly unsorted) feature list at AliExpress.<br>
<br>
The specification list from the link in your first post clarify that
this is HDMI Input:<br>
<br>
<ul>
<li>Main chip – MacroSilicon/UltraSemi MS2130 USB 3.2 Gen 1
high-definition video and audio acquisition chip</li>
<li>HDMI input up to 4Kp30, 24/30/36-bit depth color</li>
<li>Video Output up to 1080p60 in YUV or JPEG output format</li>
</ul>
Regarding USB OutputYUY2, the feature list above is yet most
clarifying (compare another post from me):<br>
<a class="moz-txt-link-freetext" href="https://lists.cinelerra-gg.org/pipermail/cin/2023-February/006310.html">https://lists.cinelerra-gg.org/pipermail/cin/2023-February/006310.html</a><br>
<br>
YUY2 4:2:2 Packed 8 bits pr channel<br>
<br>
That was clarifying from Microsoft - but who another place say
unfortunately not so clear yet, so yes, we hopefully will see ;)<br>
<a class="moz-txt-link-freetext" href="https://learn.microsoft.com/en-us/windows/win32/medfound/recommended-8-bit-yuv-formats-for-video-rendering#422-formats-16-bits-per-pixel">https://learn.microsoft.com/en-us/windows/win32/medfound/recommended-8-bit-yuv-formats-for-video-rendering#422-formats-16-bits-per-pixel</a><br>
<br>
<blockquote>4:2:2 Formats, 16 Bits per Pixel<br>
<br>
Two 4:2:2 formats are recommended, with the following FOURCC
codes:<br>
<br>
YUY2<br>
UYVY<br>
<br>
Both are packed formats, where each macropixel is two pixels
encoded as four consecutive bytes. This results in horizontal
downsampling of the chroma by a factor of two.<br>
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cite="mid:CA+rFky45ScvpXFL4vYPPh-STvdmezz476=bu_ti7Ox24xJDKRQ@mail.gmail.com">
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<div> <br>
Regarding "24/30/36bit Deep color" I found the following
in wikipedia:<br>
<br>
<a
href="https://en.wikipedia.org/wiki/Color_depth#True_color_(24-bit)"
target="_blank" rel="noreferrer"
moz-do-not-send="true" class="moz-txt-link-freetext">https://en.wikipedia.org/wiki/Color_depth#True_color_(24-bit)</a><br>
True color (24-bit)<br>
<br>
24 bits almost always use 8 bits each of R, G, and B
(8 bpc).<br>
224 gives 16,777,216 color variations.<br>
humans can see the changes between some adjacent
colors as color banding.<br>
<br>
<br>
<a
href="https://en.wikipedia.org/wiki/Color_depth#Deep_color_(30-bit)"
target="_blank" rel="noreferrer"
moz-do-not-send="true" class="moz-txt-link-freetext">https://en.wikipedia.org/wiki/Color_depth#Deep_color_(30-bit)</a><br>
Deep color (30-bit)<br>
<br>
Deep color consists of a billion or more colors.[15]
230 is 1,073,741,824. Usually this is 10 bits each of
red, green, and blue (10 bpc).<br>
36-bit<br>
Using 12 bits per color channel produces 36 bits,
68,719,476,736 colors. <br>
<br>
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<div dir="auto">well, I hope Terje's camera can be
switched into hdmi progressive output mode .....<br>
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<br>
Yes, and it has already proved to do this even better
than first expected, I think.<br>
Again, according to S. Mullen's handbook for V1 and FX7
(who mentioned BMD's capture cards in this context): <br>
<blockquote>Sony’s 3ClearVid technology is tightly
integrated with Sony’s Enhanced Imaging Processor
(EIP). According to Sony, the EIP works at<br>
1920x1080 in a 4:2:2 color space. The EIP has a
2-million-pixel buffer for each of the three primary
colors.<br>
<br>
When the camera is operating, the EIP generates
uncompressed 1440x1080i with a 4:2:2 color space.
Uncompressed 4:2:2, 8-bit,<br>
digital video plus dual-channel, PCM, 16-bit, 48kHz
audio are output via the HDMI port, while 4:2:2 analog
is output via component-out.</blockquote>
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<div dir="auto">Another interesting output then, for this
specific camera? (component out - 3 cables confusingly colored
as red-green-blue, even if they carry luminance and
color-differentials)</div>
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Therefore, you can record 4:2:2 live HD video from the
camera without MPEG-2 compression. <br>
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According ot my tests FX7 created FHD 1920x080p, 8-bit
422 video..<br>
I also tested 1440x1080 video size, which was not listed
among v4l2 supported format. This format was
automatically encoded as 1280x1024.<br>
<br>
So I also wondered how it was possible to get encoded
(SD) 720x576 and 1280x1024, though they supported by
v4l2/capture card?<br>
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<div dir="auto">no idea ...sometimes device just scale
automatically in hardware ...</div>
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<div> I think the interesting explanation also has been
found in Mullen's handbook:<br>
<blockquote>If the HDMI handshake determines that the
device can accept 1080i—then 1080i is sent. If the
handshake determines that the device can only accept
480i/576i—then<br>
480i/576i is sent. <br>
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<div dir="auto">contain few links. Of course main
problem is verification ..... if they just paint
them (usb connectors) blue for no reason ...:/</div>
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