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By the way I recently acquired 2 BE75 capture boxes if anyone wants to convert to our religion, I will be listing them shortly, you do need a SDI to USB dongle to complete the workflow. BE75 has a full frame TBC so one digitization process only but I don't know how it compares to a stand alone full frame TBC, One thing I can say is I never had problems with any tape that required me getting one. |
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I don't know what do you mean by analog SDI, but SDI has always been digital "Serial digital interface". For analog video capture SDI 3/4 SD lossless (compressed or uncompressed) is the preferred option.
I don't have a desktop so instead of AJA 3g I use BM UltraStudio SDI/USB 3.0. http://www.digitalfaq.com/forum/atta...1&d=1571096547 http://www.digitalfaq.com/forum/atta...1&d=1571096547 http://www.digitalfaq.com/forum/atta...1&d=1571096547 |
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I wanted to offer some insight in this thread.
In Sergei's defense, the transition to doing captures via SDI is what I feel imo a great idea, when looking towards a more modern workflow. Alot of the pro based hardware say even 10-15 years ago were out of reach for the common person, even advanced hobbyists. Of couse, SDI is a digital signal which can carry up to 16 channels of embedded audio (similar to HDMI) minus the HDCP crap that plagues HDMI. SDI also carries a full, uncompressed, unrestricted signal and can carry for long distances, which is why you will never see SDI based equipment nor connections in consumer gear. While you can capture uncompressed, for SDI work there are other codecs that are not hard drive space-heavy which can be used and is an editable format, and that would be Avid's DNxHD and Apple's ProRes. They are compressed, but very high quality formats and are a great intermediate format designed for editing (depending on what NLE you use). Signals from SD to HD, and even UHD (via 6G-SDI and dual-link) can pass through SDI cables. The main issue with with Blackmagic products that I have read about on the forums over the years is that they are pro-level devices, and for these to work correctly like they should they require a clean, stable sync signal (both line and frame based TBC) in order for those devices to be really useful, even AJA products. Yes in this day and age alot of the pro level stuff aren't focused on consumers so is why consumers are left with the more crappy junk that's out there that guarantee poor results. The XP era of video hardware was the best and king for video captures in its time. I still have an XP machine myself which still captures great. But you have to ask yourself, how much longer is the XP era gear going to be around? The recommended TBC's on the forums here along with the SVHS VCR's are getting very hard to find now and many folks that have them aren't letting them go. Same with specific XP based computer hardware as they are overpriced on ebay and probably in poor condition. And of course, if your XP system dies, then what? So I think the idea of this thread is to eventually consider some other ideas in capturing the old analog videos, which is just more than VHS. The XP method here on the forums will always be an excellent and advisable method to capturing the sucko VHS format. Heck I still have VHS tapes back when VCR's made their debut in 1976-77 (and yes they still play) with the top loader Sylvania 2-head unit we had. But SDI is also a great option, if one has the time, research and the funds to upgrade to such a setup and to learn its own ecosystem for captures. There's always a preferred and advisable method, but there's no right or wrong way to capture video since the end result based on the end user's requirements. |
When I decided to switch to SDI workflow I studied the compatibility issue with modern computers pretty carefully backed with my experience of owning capture gear over the years and the different issues that I had over 3 or 4 generations of MS windows.
Going from an analog tape which is an old technology that never going to change to a capture software that keeps evolving I've divided the capture workflow into two sections, One that doesn't need to evolve and requires a device of a high quality from the analog tape era that is made specifically for that purpose. Two, the part that needs to evolve which requires a device that is compatible with modern computers and can be replaced whenever it is outdated and yet it can still connects and communicates with the device in the first section of the workflow via a link despite they are from different generations. After a lot of research and experimentation that link is determined to be the "SDI connector". SDI has been evolving for decades in several generations and they are all backward compatible. So for a device in the first section any composite/S-video/component capture device to SDI will be adequate for the job and those are going to be pro devices since SDI is not a consumer connector,some are built in full frame TBC, it can be as old as the ice age and it still wouldn't matter because it is not going to communicate directly with the computer. The device in the second section of the workflow is the one that translates between the old capture device and a modern capture software, it is basically just an SDI to USB X.0 adapter (or SDI expansion card for desktops), it can evolve with the computer software/hardware, SDI/USB2, SDI/USB3, PCI, PCI-e, PCIx ....etc With this approach you can still have/keep your old decent tape capture device that can be used with any modern computer without having to switch to a crappy modern capture device (USB, HDMI ...) or use a legacy capture device and stay with Windows XP for the rest of your life. |
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