HAM Video tutorial

[emufan]

i was posting this in another thread, but maybe it fits here too:
http://www.hyakushiki.net/links.htm ( AVI4HV home) , author has updated encoder and player, now supporting HAM8 (updated 2012/07/15).

[Amiten]

Thanks for the info emufan!!!

Incredible Amazing AGA Support inside de New AVI4HV!!!!

[Thorham]

I think I might ask the author about the video format so I can finish my own, written from scratch, video converter, which is mostly done. Has better quality HAM/HAM8 rendering (based on meynaf's HAM rendering), has two properly working dithers: Error diffusion and ordered (and of course no dithering), handles both video and audio in uncompressed AVI files, and allows 8 bit and 14 bit audio output.

The only problem is deciphering the video file format, otherwise it would've been finished. Or someone would have to write a new player (I don't have the time right now).

[emufan]

Amiten: no problem, just sharing the good news

Thorham: sources are included. i think the whole magic is in *.BAS and *.ASM.
if you get in contact with damageX, submit a big thanks for his work!

[amiman99]

Originally Posted by keitha1200

What type of monitor are you using, and memory spec?

The only difference I can see from my tower and desktop set-ups is: different memory configuration and using a multi-scan monitor. I suspect it's a memory issue on the 1200.

I have Dell LCD monitor capable of 15KHz display, as far as memory, I got 64MB.
I do want to point out that the videos run choppy from a HD with FFS. All videos I tried and work very well are from CF card with FAT95.
Maybe that's the problem?

[Amiten]

New HAMAGA.RUN complete successfully my first conversion for 24Bits Ham8 Video File at 288X200 15 FPS and audio conversion to 22050hz 8 bits...

For me its Amazing cuality and goes very good on 030 y gonna try more resolution on the 060 to see

Thanks for watching....

[ Show youtube player ]

[Thorham]

Originally Posted by emufan

i think the whole magic is in *.BAS and *.ASM.

Yeah, I know. I actually didn't use any of the original authors work. The code is open source, so I can post it if anyone's interested (or wants proof ).

I just wish I either had the time to write my own player, or that someone else would write one. It really sucks having a converter that's almost done, only to find out that it's likely I'm not going to have time to do a player. Sigh... Perhaps I can get out from underneath some of the bull crap I have to handle, on the other hand, a converter is only half the job done, and I have a problem with finishing things (the converter really is almost done, though)...

[emufan]

Amiten: looks really good.
Thorham: just take your time, at some point you will finish the player too

[rkauer]

Originally Posted by amiman99

I tried the first video and it works fine on my A1200 050 50MHz.
Try to use this ham player

Which accelerator is that?

[amiman99]

Originally Posted by rkauer

Which accelerator is that?

SORRY, a typo, Blizzard IV '030 50MHz.

[Thorham]

Originally Posted by emufan

Amiten: looks really good.
Thorham: just take your time, at some point you will finish the player too

Thanks, but I somehow doubt it.

[ImmortalA1000]

You can use Videoget to download youtube FLVs and convert them to AVI in one easy step btw

[turrican3]

nothing new in the world of ham converter and players ????

[NovaCoder]

I had a bit of luck last night using VirtualDub to create an AVI (320x240) with the CinePack codec. I'll have another play with the VirtualDub settings and see if I can improve it.

[ Show youtube player ]

[amiman99]

Originally Posted by NovaCoder

I had a bit of luck last night using VirtualDub to create an AVI (320x240) with the CinePack codec. I'll have another play with the VirtualDub settings and see if I can improve it.

[ Show youtube player ]

You can try this filter http://whitewing.co.uk/vdub_errdiff.html
It makes conversion from 24bit to 16bit look much better.

[NovaCoder]

Cool thanks, I'll give that a try

[Retro1234]

Originally Posted by turrican3

nothing new in the world of ham converter and players ????

AVI4HV offers good results

[turrican3]

perhaps for movies but if you want to convert an intro of a cd-rom game, the result is 1 time good 1 time ugly because the colours can be slobbery.
it should have a version who could make 256 colours and ham and the other problem is the player, you can't quit it.
My goal was to take intro games from others game machines and add these intros to the cd32 version.
one i did and use is flink with the intro of the segacd version... the only problem is that you have to look all the intro, i found no way to quit the intro before the end... And with flink the colours are no too much slobbery.

[pandy71]

Avisynth http://avisynth.nl/index.php/Main_Page script can help with color reduction. It require http://ldesoras.free.fr/prod.html#src_ditheravsi package and related, yadif http://avisynth.org.ru/yadif/yadif.html plugin is required if antialiasing is activated, script have some limited "flexibility" (hires and interlace "support"), it can be extended by adding framerate conversion http://avisynth.org.ru/mvtools/mvtools2.html to reduce fps in smarter way due Amiga limitations.

This is relatively slow script and have own limitations (rounding errors?), perhaps due ditheravsi and it require tweak for different color depth - it is best to use some grayscale picture pattern - for example

#Load_Stdcall_plugin ("C:\Program Files\AviSynth 2.5\plugins\yadif.dll")

########

src="Studio Killers - Ode To The Bouncer (official video).mp4"

########

bits = 4.0 # Valid range: 0 - 8 (Float)
mul=String (Pow (2, 8 - (bits - (22.0/256.0))))

########

m0de=6 # Valid range: (-1..8) (Int)
nlev=0.00 # Valid range: 0..4 (Float)
slev=(15.0/16.0) # Valid range: 0..4 (Float)
ordyn=true # True or False

Lace=0 # Valid range: (0 or 1) (Int)
Hires=0 # Valid range: (0 or 1) (Int)
A=(16.0/9.0)
H_SIZ=320
V_SIZ=INT((ROUND(((H_SIZ/A)/2))*2)*(1+Lace))

########

V=FFVideoSource(src, cache = true, cachefile = src + ".ffindex", fpsnum = -1, fpsden = 1, pp = "vb:a/hb:a/dr", colorspace = "YV12", threads = -1, seekmode = 1)
A=FFAudioSource(src, cache = true, cachefile = src + ".ffindex")
AudioDub(V,A)
#AmplifydB (-24.0)
#KillAudio()

####

#ColorYUV(gamma_y=8, cont_y=32, cont_u=32, cont_v=32)

####

ConvertToRGB24(Interlaced=False, matrix="rec709")

#### Test
#ImageSource("G8.png",pixel_type="RGB32",end=24,fps=25.0)
####
Blur(-0.75,-0.5)
#ReduceBy2()

####

Interleave(ShowRed("YV12"),ShowGreen("YV12"),ShowBlue("YV12")).Limiter(0,255, 128, 128)

####

Spline36Resize(H_SIZ*(1+Hires),V_SIZ)

####

#Merge((Merge(Yadif(2,0),Yadif(2,1),0.5)),(TurnRight(TurnLeft(Merge(Yadif(2,0),Yadif(2,1),0.5)))),0.5)

####

Dither_convert_8_to_16()
Dither_lut16 (expr="x "+mul+" /")
DitherPost (mode=m0de, staticnoise=true,ampo=slev, ampn=nlev, dyn=ordyn, pat=1, prot=true, y=3, u=1, v=1)
mt_lut ("x "+mul+" *", y=3, u=1, v=1)
MergeRGB(SelectEvery (3, 0),SelectEvery (3, 1),SelectEvery (3, 2))

####

#PointResize(640, V_SIZ*(2-Lace))#.Blur(0.25,0.25)

for fixed pallete animation ImageMagick http://www.imagemagick.org/script/index.php batch can be helpful.

convert -quiet source.avi -ordered-dither o2x2,12 -delay 1x10 -dither Riemersma -colors 256 +map -type optimize source_od2.gif
convert source_od2.gif  -delay 1x10 -layers OptimizeTransparency +map source.gif

Later conversion from gif to anim should be easy... for this script uncompressed (raw) RGB avi file is required

feel free to modify and improve - reading documentation for plugins or imagemagick can be helpful as there is many options to change

[aybe]

Thanks for the FFMPEG tip !