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IanSB / RGBtoHDMI

Bare-metal Raspberry Pi project that provides pixel-perfect sampling of BBC Micro video and conversion to HDMI
GNU General Public License v3.0
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PAL Artifacts with c64videoenhancement board #20

Open thbreidenbach opened 9 months ago

thbreidenbach commented 9 months ago

Hi, just tried the beta 60 with c0pperdragons videoenhancement board and Analog Board/RGBtoHDMI. All works perfect but PAL Blending seams to be off for this version and trying different settings doesn’t change the output for in different test images that use pl blending. Is there a way to reproduce PAL Artifacts in this constellation? Regards

Thorsten

IanSB commented 9 months ago

@thbreidenbach

Are you using c0pperdragon's new lumacode board or the old YUV board?

The PAL artifact only works with the new lumacode board at the moment. I just tried Beta 60 with that and it does show a difference on my system although it is quite subtle (some squares are different):

Artifact Off capture0

Artifact On: capture1

thbreidenbach commented 9 months ago

I use the yuv board because I didn’t know the other. We’re hardware enthusiasts so building was mandatory.. Will you still Support yuv and are there chances for Artifact support?

IanSB commented 9 months ago

@thbreidenbach

Try this alpha 61B release which has PAL artifacts for the YUV profile: https://github.com/IanSB/RGBtoHDMI/issues/21#issuecomment-1769689216

thbreidenbach commented 9 months ago

That works quite well! I had some trouble finding the right palette settings (Commodore64 instead of C64yuv) and I'm still new to the settings. Theres still some parts that seem to be off, but it looks very promising! IMG_4885

IanSB commented 9 months ago

@thbreidenbach

That works quite well! I had some trouble finding the right palette settings (Commodore64 instead of C64yuv) and I'm still new to the settings.

Sounds like you just overwrote the sd card without wiping it first. The names of some palette and profile files have changes so if you don't wipe you will end up with old profiles and palettes mixed in with new ones.

You only need to select the "Commodore 64 YUV" profile and everything should be set up correctly.

The are two settings in the palette menu that affect things:

PAL Odd line: This sets the behaviour of the PAL Odd lines which have a different phase to the even lines Off =same as even Blended Colours: only different colours are blended All Colours: all colours are blended which can give hanover bars on solid colours

PAL Odd Level: This changes the phase offset of the odd lines compared to the even lines. Setting this to 0 is the same as setting PAL Odd line to off.

thbreidenbach commented 8 months ago

Thank you!! Thats about right.. Wiped the card, copied, result is far better. I'm still new to the concept and need to fiddle around. Would it be possible to change the special c64yuv palette interpretation from within rgbtohdmi config?

The results are really great! In some demos it seems like there's a flicker effect in High Res Images. The picture on composite shows no flicker. Could be intended, hard to tell.

IanSB commented 8 months ago

@thbreidenbach That feature is now in the new beta 61 release: https://github.com/IanSB/RGBtoHDMI/releases