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capture card signal status receives 1080p instead of 720p

TNyer
Beginner
6,767 Views

Description

Provide a detailed description of the issue

I would like to record 720p footage from my Skylake computer. I am using a separate computer for recording with a capture card. In VirtualDub, looking at the custom properties the SIGNAL STATUS does not reflect the resolution on the Skylake system. It always shows 1920x1080P. I have tested the issue on non-Intel system and the SIGNAL STATUS was correct (1280x720P). So I assume some kind of signal protocol is missing from the Skylake driver.

Does it fail every single time, or only sometimes?

 

If you can offer a % rate please do.

YES

100%

Hardware (HW)

Brand and Model of the system.

Intel(R) Core(TM) i3-6100 CPU @ 3.70GHz (4 CPUs), ~3.7GHz

Hybrid or switchable graphics system?

 

ie Does it have AMD or NV graphics too?

NO

Make and model of any Displays that are used to see the issue (see note2 below). 

LFP = Local Flat Panel (Laptop panel)

 

EFP = External Flat Panel (Monitor you plug in)

SyncMaster S24A350H (Digital)

How much memory [RAM] in the system (see note2 below).

8192MB RAM

Provide any other hardware needed to replicate the issue.

 

ie: Cables&brand, cable type [vga, hdmi, DP, etc], dock, dongles/adapters, etc

HDMI to DVI cable with SA7160 PCI capture card

<sp...

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Amy_C_Intel
Employee
1,553 Views

Hello, Toorop:

Have you tried testing a different driver version? Perhaps with this version https://downloadcenter.intel.com/download/25818/Intel-Graphics-Driver-for-Windows-7-8-1-10-15-40- Download Intel® Graphics Driver for Windows® 7/8.1/10* [15.40].

Could you please let us know the capture card model?

Regards,

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TNyer
Beginner
1,553 Views

Hi Amy!

Thank you for your reply.

I tried with the driver you recommended, but the issue still persists.

My capture card: Yuan High-Tech SC512N1-L DVI 1CH DVI Software Compression H.264 Capture Card

This card supports 1920×1080p@60fps & 1280×720p@60fps.

 

How I found something is not right:

 

I would like to record lossless footage from the Skylake system with the aforementioned resolutions. With 1080p resolution, I get the lossless footage with correct colors, but with 720p, there's some minor corruption in the colors. Unfortunately, this corruption is a deal-breaker in my case.

The only thing that I spotted is that the signal status doesn't reflect the resolution used in the Skylake system in VirtualDub in the 720p case. My best guess is that somehow the Skylake sends out FullHD footage (upscale?) and at the recording side a downscale and resample corrupts the colors - but I am just guessing, other things could contribute as well.

 

 

I retested the whole scenario again with a non-Intel GPU and the signal status was 1280x720p and the colors were correct.

 

Thanks!

 

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Amy_C_Intel
Employee
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Toorop, let me do some research based on this and get back to you.

Regards,

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Amy_C_Intel
Employee
1,553 Views

Toorop, I have noticed that the VirtualDub installed is an old version. Is there any chance you can download a newer version? If possible, I would you to try a different video tool, maybe a recent one.

Regards,

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TNyer
Beginner
1,553 Views

Hi Amy!

Sorry for the delay.

What version of VirtualDub should I try? On http://virtualdub.sourceforge.net/ the home page of VirtualDub I see 1.10.4 (stable) as the latest and that's the version I am using.

Some further notes about signal status.

No matter what resolution I use in Win10 desktop, the signal status is 1920x1080. It's strange because on the non-Intel config I am pretty sure that when I initially reported this issue it worked correctly. Now, both systems reports 1920x1080 even if the resolution is set to 1280x720.

Just to recap my issue: I would like to record footage to another PC with a capture card.

On the source side (Skylake and non-Intel) if I set the resolution within the application to 1280x720, I get the correct signal status on the recording PC with the non-Intel PC, unfortunately the Skylake still reports 1920x1080. This causes minor blurring (resample) on the recorded footage.

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Amy_C_Intel
Employee
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Is there any chance you can try with a different video tool? The reason why I am suggesting this is because the VirtualDub latest version seems to be from 2013, and I would like you to try with a recent one.

Regards,

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TNyer
Beginner
1,553 Views

Is there a recording software that you can recommend?

I tried with Open Broadcaster Software (OBS) Classic and Studio. OBS is geared towards streaming so it's not so straightforward to record lossless footage.

OBS Classic has no simple setup for it. I used x264 encoder with Constant Rate Factor (CFR) 0. Unfortunately, it can't save in avi container.

OBS Studio has a simple set up for lossless video recording but I got minor blurring, even in 1080p.

Double checked with VirtualDub, it was fine, of course. I really don't think VirtualDub introduces the error. And I stress again, it's only in 720p.

Is there a reason why you cannot comment on the Signal Status mismatch, I think it's the main culprit.

Just to explain the issue in full detail: the footage I want to record contains a wide vertical stripe on the very left. It's about 60 pixel wide and covers the whole display in the vertical direction. It color can vary in the vertical direction. Let me illustrate a scenario with 720p:

<-----60px----->

R |

|

E 500px

|

D |

---------------------

B |

|

L |

220px

U |

|

E |

<-----60px----->

In the non-Intel setup, I can count the pixels without any corruption: 500 red pixels and 220 blue pixels.

In the Skylake setup, I get 499 red pixels at the top and 219 blue pixels at the bottom and 2 blurred pixels (red-blue blend) at the switch point.

I would like to emphasize again that 1080p is correct, 720p is blurred and I have a gut feeling that the issue is in connection with the Signal Status mismatch.

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Amy_C_Intel
Employee
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Toorop, I am going to review your case with the engineering team.

 

I will keep you posted.

 

Regards,

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TNyer
Beginner
1,553 Views

Thanks Amy!

I am having trouble with installing Intel Management Engine Components on the system. I am not sure if it's connected to the 1080p issue.

I will keep you informed.

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Amy_C_Intel
Employee
1,553 Views

Toorop, thank you for your patience.

 

I have followed your instructions, but from my end I was able to set and record at 1280x720 with no issues, I am using a https://www.startech.com/AV/Converters/Video/usb-3-0-video-capture-device-hdmi-dvi-vga~USB3HDCAP USB 3.0 Video Capture Device - HDMI, DVI, VGA | Video Adapters | StarTech.com.

 

Were you able to install the Intel® Management Engine driver?

Regards,

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TNyer
Beginner
1,553 Views

Hi Amy!

Thanks for the testing!

I have retested the issue with a different non-Intel PC and everything was fine at 1280x720 - correct signal status and correct capture. So, I have two non-Intel PCs (with two different GPU vendors) both of which work perfectly. The whole setup is unchanged between these tests (same recording PC with the same capture card, same cables).

I was able to install the latest Intel Management Engine driver from Intel's site. I had trouble installing the version which was shipped with the motherboard.

I guess we are out of ideas. I will report back if any future driver update resolves the issue.

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idata
Employee
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Toorop, I used an USB 3.0 capture device, and everything worked fine. Between the your system configuration and mine one of the differences is that you have a PCI capture device; same brand, but different connector. So, what I think is happening here is that you might be facing a compatibility issue between the PCI and the Intel® HD Graphics 530. At the moment, I do not have that same capture device as you, but I do not rule out the fact that this could be a compatibility issue.

I have submitted a ticket via email to https://www.startech.com/Support https://www.startech.com/Support, I will keep track of this.

Regards,

Amy.

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TNyer
Beginner
1,553 Views

Thanks for your efforts Amy!

My capture card is manufactured by http://www.yuan.com.tw/en/products/capture/capture_sc512n1l_dvi_spec.htm Yuan Hi-Tech. I don't think StarTech has anything to do with this.

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idata
Employee
1,553 Views

Thank you for the clarification. I will try to contact them.

I will keep you posted.

Regards,

Amy.

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Amy_C_Intel
Employee
1,553 Views

Hello, Toorop:

I have been trying to contact http://www.yuan.com.tw/en/contact/Contact.htm Contact Us | YUAN, but have not received any news from them, I will submit my question one more time.

 

I will keep you posted.

Regards,

Amy.

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TNyer
Beginner
1,553 Views

Hi,

Still here, never give up.

Today I emailed them as well with the issue, but I don't hold out much hope - I guess, you didn't get a reply.

An additional issue with the Skylake system. Somehow, with some games I got interlaced footage at the capture card (1920x1080i). Other resolution settings work fine - but ironically, I can't record them, since the footage arrives 1920x1080 (the original issue). Other non-Intel systems work fine.

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TNyer
Beginner
1,553 Views

Hi,

I don't know how this didn't come to mind sooner, but here we go:

Same hardware configuration but different OS: Ubuntu 16.04 LTS 64bit.

The driver in use: i915_bpo

And I got 1280x720p footage at the capture card.

I think this proves my initial thought that this is a driver bug with Intel (on Windows).

I can test the interlacing issue as well, but that requires more time.

What is your take on the issue?

Are you in touch with someone in the driver developer team / how the bug tracking process works?

Should I expect some kind solution or do I beat a dead horse?

Thanks!

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TNyer
Beginner
1,553 Views

Maybe there is light at the end of the tunnel.

I am hopeful that my problem is the same as /thread/51304 this one - I added a reply there, so they can track this down as well.

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idata
Employee
1,553 Views

Toorop, thank you for sharing that information. I will keep track of that thread too.

Let me see what I can do about that.

FYI, I have not received any news from http://www.yuan.com.tw/en/contact/Contact.htm Contact Us | YUAN.

Regards,

Amy.

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idata
Employee
1,395 Views

Hello, Toorop:

 

 

I just wanted to check on this thread since I noticed that you posted on the thread something about finding a possible fix. Please let me know how that went.

 

 

Regards,

 

Amy.

 

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