[0] https://www.usa.canon.com/internet/portal/us/home/support/de...
(I used to have a CanoScan 8800F.)
TBH 35mm slides are the biggest pain in terms of time-vs-return out of any format. It's a painstaking process and I could not justify the $5000+ cost for a dedicated high-speed machine. But if the end output is ~300dpi for TV display, etc I may be able to help with a fast option.
I think this was in reference to your comment that your side gig that provides this service is “kinda on pause though”. :-)
Especially I wonder if you've got advice on picking a useful level of resolution when digitizing slides. I seem to recall that a 35 mm slide contains around 10 megapixel data. If correct, is it at all useful to digitize at a higher resolution for general purpose usage, eg display on a computer or showing slideshows with a digital projector.
Otherwise I'm currently leaning towards digitizing at 4K resolution as a default, given that 4K is 8.2 Mpx.
How does dynamic range come into play? I seem to recall that slide film has a high dynamic range in general.
I started down the path of doing this project for a family member after we found an old VCR and I had been playing with a few of the cheap HDMI capture cards.
I've had a world of hurt with video/audio sync issues and the recommendation he uses to grab the component to HDMI device led me down a path of searches where I finally found that my V4L2 capture with ffmpeg was using a different clock than the ALSA sound capture device. Using ffmpeg's -ts flag I have set V4L2 use 'abs', the same as ALSA.
I haven't done any extended length captures yet so I'm not positive I won't have drift, but on the shorter length clips it has worked flawlessly.
Anyway, thanks again for the link. His advice led me down a path that finally seems to have made the capture aspect of this project work!
I've heard of d8 camcorders that are v8 compatible but never seen. V8 and hi8 I just use rca.
Blackmagic digital studio capture cards work very well.
No matter what you do all these old formats never look good imo.
Modern computers with thunderbolt will take a converted fw stream without any problem. I am using several old fw400 sound interfaces with a string of adapters without any problems, on both mac and pc. The mac laptop has tb built in, for my workstation pc (Windows 10) I bought a PCI Express io adapter for 30 euro. Works perfectly.
Sound interface -> fw400 -> fw800 -> tb -> tb3 -> mac|pc
YMMV with video, but I can't think of why it wouldn't work. I haven't tried a converter.
I can only add, that for me it worked best to capture the tape all in one go, and not try to start-stop the camera with DV control. Be it deteriorating tapes or whatever the cause, but the capture software had problems resuming the camera if it was ever paused.
And it leads to that other challenge worth mentioning: Even though DV is technically a lossy format, it results in really large files.
Just run the tape at half or a quarter of the speed. The spinning helical head should still produce data. Then it's a matter of assembling it in software.
For high-speed photos a popular choice is the Kodak Ps50/ps80 -but it was discontinued like 2 years ago so you have to get it second hand. TBH, I've used the Epson FastFoto series for fast scans at 600dpi (useful when you have literally thousands you want to get through - a shoebox will hold 1500+ photos) and it has great quality if you set it up right (read: turn off any image post-processing and do manual correction). But beware of a few caveats: the rollers are garbage once they heat up and glossy photos will 'stretch'. You can mod the rollers (kinda). The rolling action also causes some static buildup (thus: dust) and there's no Digital ICE (image correction/enhancement) to remove it.
For video, check the youtube video above for one option. I've found that you can get really good results with a Digital8 camcorder with a good Digital/Analog converter. They existed in this weird sweet spot of the transition of analogue to digital. They often have RCA/SVideo connections out to Firewire (yes.) Use it as a pass-through for a really good VCR (which are getting harder and harder to find).
Technology Connections (YouTube) does some good coverage of capturing/converting analogue video - hardware choices make huge difference. https://www.youtube.com/watch?v=ZC5Zr3NC2PY
There's clearly a need/desire for this kind of stuff (though it's sad how many times I'm approached as someone is near death). Don't wait til that moment to save the stories and memories that you have.
I've been back and forth about how much I want to dive in with this project. If anyone is local and really interested in some of it, drop me a line. There are some cool avenues I've touched - seniors, alzheimers, story capture.