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VIDITEST13 - A tour round a Desktop

Started by ComSoft6128, 19:13, 21 March 22

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ComSoft6128

Laptop->HDMI to Composite video converter->VIDI unit/6128 (Using VIDI software)->OSSC & Hauppauge Rocket.

A little "cheating" here - I increased the size of the laptop screen to 200% to make text more legible.



Copyright of the song 'Take on me'  in video and music content in this video is with 'a-ha' and the other copyright holders, and a copyright claim has been recognised which allows the copyright holders to run ads on this video.

THIS CHANNEL IS NOT MONETIZED.

This video was created under the 'Fair Use' doctrine to demonstrate the Rombo VIdeo DIgitizer (VIDI) hardware unit.

a-ha:
https://a-ha.com/
https://en.wikipedia.org/wiki/A-ha
https://en.wikipedia.org/wiki/Take_On_Me

Other links:
https://www.cpcwiki.eu/index.php/VIDI_digitizer
https://en.wikipedia.org/wiki/Fair_use
https://en.wikipedia.org/wiki/Fair_dealing#United_Kingdom

Not emulated - original hardware and software.
Please note that  the aspect ratio for this YouTube video is 16:9 but the CPC monitor
has an aspect ratio of 4:3 so you may wish to adjust your viewing device accordingly.

Gryzor


ComSoft6128

#2
Not my idea!

It's mentioned in the original VIDI manual.
I think this might have been the method that some loading screens from other computers were ported to the CPC.
'The Pawn' has what looks like a bad mode 2 version of the loading screen from the ST version - see 0:25 in the video below.


And when I say "bad" I mean it looks like a straight port without any "tidying up" using the Advanced OCP Art Studio.



Gryzor

Haha yeah, that was pretty bad😀

jaymanu

Hello
Might be a stupid question, but is the CPC playing a recorded video file ?
Or is it only monitoring the video input live from the VIDI ?

How big is the video file ?
Is the format documented ?
Couldn't we achieve better quality by generating such a file from a digital source (mp2, mp4) and skipping the analogue step ?

ComSoft6128

#5
The CPC (using the the VIDI hardware and software) is displaying in real-time video input from a laptop with the file being stored as an MP4 file on a USB drive in the Hauppauge Rocket.
The audio component is supplied by a microphone also connected to the Rocket, however, that type of makeshift setup will be replaced shortly with a direct (3.5mm to 3.5mm) cable between the laptop and the Rocket.

Just in case anyone thinks this isn't "Retro" I was doing similar work nearly 30 years ago using the VIDI and the VideoMaster unit, the storage medium then was VCR tape.

VideoMaster:
https://cpcrulez.fr/hardware-tv-videomaster.htm
https://cpcrulez.fr/hardware-tv-videomaster.htm?t=Uw==
https://www.cpcwiki.eu/index.php/Videomaster

jaymanu

#6
As I understand, the CPC with VIDI is only able to record still frames, is that it ?

I wonder if we could play some video stored in a huge file on modern mass storage like SD card. Like the amiga does with raw HAM videos. What size and frame rate could we achieve ? 17k * 25 fps = 425 kb/s seems a lot, but perhaps with half or quarter resolution, and/or frame decimation ?

The CPU is not faster than in the 80s, but now we can easily store several megs, though I don't know how fast we can read those megs.



ComSoft6128

Yes, VIDI and the CPC can only grab and save user selected 17K screens - it updates at 5/6 screens a second.

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