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Old 17 July 2020, 07:16   #81
saimon69
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Quote:
Originally Posted by Yannick View Post
The mod is something that I can't help with.
What is important is that is remains synchronized with video.

With what Ross is doing we can assume that video will be at same speed / frame rate as the original video (30fps).

So we are looking for someone able to build up a 4 channel mod as close as possible to the original version that will be small enough to fit together with video and code on one floppy.

Something less than 100kB or even 50kB would be required.
Testing a composition right now and less than 110/120k will be hard :/
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Old 17 July 2020, 07:58   #82
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What an interesting project..
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Old 17 July 2020, 08:55   #83
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For saimon69

I'm not an expert, but the size you are referring to is packed or unpacked ?

I mean exist various MOD packers which could be used to reduce the file size of the module
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Old 17 July 2020, 09:10   #84
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I'm experimenting to add a sort of motion blur.
The free way is forcing temporal artifact using interlaced mode.




In WinUAE seems good, no idea in a real setup..
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Old 17 July 2020, 10:16   #85
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Quote:
Originally Posted by ross View Post
I'm experimenting to add a sort of motion blur.
The free way is forcing temporal artifact using interlaced mode.

The expensive way, presumably, to use say, four rather than two buffers, and a three bitplane screen, with the two extra bitplanes set to the two previous frames?


The big advantage of that approach, of course, is that you can vary how visible the blur is from scene to scene just by manipulating the palette - perhaps in response to a ProTracker 8xx command.
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Old 17 July 2020, 10:29   #86
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Originally Posted by robinsonb5 View Post
The expensive way, presumably, to use say, four rather than two buffers, and a three bitplane screen, with the two extra bitplanes set to the two previous frames?


The big advantage of that approach, of course, is that you can vary how visible the blur is from scene to scene just by manipulating the palette - perhaps in response to a ProTracker 8xx command.
Yes, this is method that I have used in the past.
I've to evaluate how impact in DMA usage.

Just few minutes ago I was exchanging a message with a friend about the 8xx command as scenes coordinator

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Old 17 July 2020, 10:53   #87
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This is another thread on my watchlist.
Very cool!
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Old 17 July 2020, 11:05   #88
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It looks really cool and I must say I'm amazed at how it all fits on one floppy yet still works so well. Ross strikes again
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Old 17 July 2020, 15:34   #89
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Quote:
Originally Posted by ross View Post
I'm not sure I've understood your sentence...

The original version from PC98 is synth based.
The Nomico version is vocal based.
You posted a (very know) .xm version.

We need a 4channel mod version (preferably a chip/tiny one)
Yeah, I'm confusing myself there . No change from normal.
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Old 17 July 2020, 16:40   #90
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Technical question.

Certainly the main platform for the demo will be the PAL Amiga (therefore with relative timings and base frequencies). There will be support for NTSC but secondarily.

As I said, the engine will run exactly on the same frame rate as the original, i.e. 30FPS.
So I will set the video frequency to PAL60.
For Amiga ECS and AGA it is not a problem, but it is for Amiga OCS PAL instead.

I can certainly use the 'classic' VHPOSW trick, but I wonder what the best way is.

Let me explain.

For a perfect 60Hz in OCS PAL Amiga you need 260 video lines (3546895/227/260) = 60.10Hz or 261 (3546895/227/261) = 59.87Hz.
But these lines number are not the usual NTSC for short (262) or long (263) frames.

So the question: for the variuos converters, scandoubler, tv decoder, OSSC, etc, its better for the 60Hz sync a precise lines number or a precise frequency?


Or I could just drop OCS support (this would solve other problems too )
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Old 17 July 2020, 17:57   #91
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Please don't drop OCS support - part of the appeal of this approach is that it'll run on any Amiga!

Have OCS and a few converters etc around here so am happy to test... Will PAL60 work on PAL CRT monitors though, eg 1084?
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Old 17 July 2020, 17:59   #92
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just a thing : a post from April 2020 already ask for Bad Apple on Amiga

http://eab.abime.net/showthread.php?t=101526

when dreams come true...
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Old 17 July 2020, 18:15   #93
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Naaaah, OCS is important...
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Old 17 July 2020, 22:10   #94
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Quote:
Originally Posted by chiark View Post
Please don't drop OCS support - part of the appeal of this approach is that it'll run on any Amiga!

Have OCS and a few converters etc around here so am happy to test... Will PAL60 work on PAL CRT monitors though, eg 1084?
Quote:
Originally Posted by Steril707 View Post
Naaaah, OCS is important...

(maybe.. )


Quote:
Originally Posted by heavy View Post
just a thing : a post from April 2020 already ask for Bad Apple on Amiga

http://eab.abime.net/showthread.php?t=101526

when dreams come true...
It seems to me it was a recurring request from many sides
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Old 17 July 2020, 22:49   #95
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I knew it was possible I wanted to prove it but didn’t have Ross coding skills on Amiga.
I’m happy that my initial idea and work is finally making it!
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Old 17 July 2020, 23:54   #96
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Quote:
Originally Posted by chiark View Post
Please don't drop OCS support - part of the appeal of this approach is that it'll run on any Amiga!

Have OCS and a few converters etc around here so am happy to test... Will PAL60 work on PAL CRT monitors though, eg 1084?
Will a PAL 60Hz mode work on OCS Amigas attached to CRT TVs via RF?
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Old 18 July 2020, 00:56   #97
saimon69
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Quote:
Originally Posted by chip View Post
For saimon69

I'm not an expert, but the size you are referring to is packed or unpacked ?

I mean exist various MOD packers which could be used to reduce the file size of the module
unpacked, as am working with milkytracker; if i reduce a bit the pitch of the drum (could become a bit beach-radio sounding though) might go below 100k but am still halfway and probably packed would save something more
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Old 18 July 2020, 05:33   #98
saimon69
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Originally Posted by Yannick View Post
I knew it was possible I wanted to prove it but didn’t have Ross coding skills on Amiga.
I’m happy that my initial idea and work is finally making it!
Another success for the EABLAB (if a team name is needed)
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Old 18 July 2020, 18:43   #99
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For the OCS users a PAL60 test program (works also on ECS/AGA).

It generate a 59.87Hz vertical frequency (very similar to the 59.83 in long frame NTSC Amigas).



Please test in your real environment.
If it works well I'll use this method for the video sync.
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Old 18 July 2020, 19:53   #100
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A small teaser : [ Show youtube player ]

Far from being the final version, we are working on improving the quality.
Here Frame rate is not not limited to 30fps (engine is running very fast!!!)

I run the demo from Floppy here, one single floppy, the total size is bellow 800kB in this version

/Yannick
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