Welcome.
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Originally Posted by alfacs
I do with a Silvercrest USB Video Grabber (SVG 2.0). I try to do it with NCH Debut software, OBS Studio and Virtual Dub. When capturing I get image but no sound.
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Bad hardware, bad software = bad quality, bad capture experience.
What's what you have: bad hardware, bad software.
"Silvercrest" just rabadges random cards, often junk. You need to take a photo of your exact unit, and post it here. Front and back.
NCH is infamous garbage software. Years ago, NCH junk ruined one of my computers so badly that I had to reformat it. The OS was bricked by there junk, using their own uninstall (which was done because it did not function as claimed).
OBS is not analog videotapes capture software. It's digital streaming/"broadcast" software, and treats everything like a webcam. A capture card is not a webcam.
VirtualDub should work (even on most bad cards), but settings matter. Audio has specific options in the capture menus, and specific settings in the capture timing settings menu.
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I think this Video Grabber isn't fully compatible with my Windows 11 because when I start capture software I need to connect and disconnect
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This is because modern Windows 10/11 want to treat capture cards like webcams. Lots of capture cards balk at this, and thus no longer work in modern Windows. It's not the cards at fault, but rather the stupid treatment by Windows (or Linux, or Mac, all the OS are guilty of this). The era of analog video capture was the 2000s, somewhat 2010s, not the 2020s. New OS don't care about video capture, which is why legacy OS are most often used for this task, and on offline computers so capture streams are not interrupted by constant nuisance updates.
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As the camcorder has either a RGB out connector and a 3,5 mm jack for earphones I tried also to plug in my TRRS input jack connector (as there is an icon with earphones with mic printed near it). I tried to do connecting to the TRRS input jack connector of my laptop a jack splitter cable with separate headphones and mic input connectors (I needed to bought it): here I connect my headphones to one input bottom of the splitter and a 3,5 mm jack male male stereo cable comming from the earphones output from the camcorder to the other input bottom of the splitter.
Then in my computer I cann't select the input recording device as the headphones with mic option is always greyed out and you see it always "Diconnected" in the window that pops up choosing "open sound system" in Debut, even when you connect all as I have explained before, even if you try to choose "Connect" or "Disable" and after "Enable".
The sound is good in the earphones output connector of the camcorder and I tested also the 3,5 mm stereo cable.
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That will never work. Your computer's generic audio input/mic is not the same as the dedicated audio input on the capture card. It won't sync to USB capture. The pathways for preview are different from the card recording, so simply "hearing" something is immaterial.
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Any help will be wellcome.
Thanks!
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There's a tiny chance your current card is fine, but I need to see it. And in that case, you'll need different drivers.
But more likely is that you'll need a different (and very specific) capture card for Win11. Because Win11 is not capture card friendly. You'll need a certain card that has drivers that reject attempts to treat it like a webcam.
Beyond capture cards, Hi8 is a format that likes to drop frames, so the quality of the player, and presence of TBCs, is extremely important. Otherwise fixing just the capture card won't fix your capture troubles.
