Simulation of digitized video/audio on the Spectrum

[Abrimaal]

Is the video stream directly sent to Spectrum RAM by an external encoder? or does Z80 convert it to 1-bit and places in the screen memory in real time?

[zxspectrum128]

This is just a simulation and for the moment not 100% possible on a Spectrum. Without audio there's no problem and it's been done many times with .TAP files with a screen$ for each frame but it only works with IDE interfaces (like the DivIDE, MB-02, etc). This video is just a simulation of what we're trying to achieve. It's not possible yet.

[Abrimaal]

So each frame is a prevoiusly converted 6144 byte screen, with 10 fps it is 61440 b/s and with the clip length 197 sec, it is more than 11.5 MB.

The newest real machine Pentagon SL has 1 MB RAM, so it is able to display about 15 seconds of such a movie without music...

Are the screens loaded directly into video RAM without use of Z80 from IDE? If so, the processor would be able to play 15 sec of music in this time...science fiction :D

[zxspectrum128]

@Biopharmer: We're getting there. LOL.

[Biopharmer]

Make a dvd player for the spectrum

[DAVIDRCGRAY]

I remember A Question Of Sport for the Spectrum, It Had digitized photos of Bill Beumont and Botham, The system struggled with that, Disc drive mind, Cheers.

[paulisthebest3uk]

Wow that is Incredible. Would love to hook a real spectrum 128 to IDE media...

[zxspectrum128]

Just get a DivIDE, ZX Matrix interface or wait for Winston's Spectranet (yes, Ethernet interface for the Speccy). But the process is complicated because the current firmware doesn't know handle this data and there's no standard yet. Gasman figured out how to do it but it involves machine code reading data sequentially from a partition. NatXCross did the same thing but cleverly added top and bottom black bars and hid audio data behind paper 0. ;) Search for "Something kinda Spectrum" on youtube.