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Hi guys,
I just tried the following setup : macbookpro - kramer VP-501xl (scan convertor) - sony 2730 with bnc. The image trembles. I can see it from up to 3m. Can this get more stable? And how? The macbookpro will in reality be a macpro with X1900.
First tried the apple vga-composite adaptor but here the whole screen wasnt covered.
Any suggestions? No flatscreens because the director doesnt want them.
Thanks,
Peter
Quote:
Originally Posted by Peter
what do you mean ' the whole screen wasnt covered ' - you probably need to set screen to use underscan or overscan mode.
what output resolution did you use?
'trembling' images are almost always power or ground problems.Quote:
Originally Posted by Peter
or interference either radio or electrical-
you will need to do electrical and power ground debugging.
and do things they normally use to elminate these things.
contact a local av company.
Quote:
Originally Posted by Peter
there are many video interference products out there- like humbuckers- or ground loop isolation transformers-
this is an american site - i do not have any knowledge of the products-
http://www.21best.com/21_best/electr...for_sale_.html
HUMplug-e
Hum buckerQuote:
Simply plug your equipment through this, to cure it of Ground Loops. Filters out unwanted voltage and current in the ground line that cause ground loop hum while simultaneously maintaining a solid, safe ground
Quote:
The Video Hum Bucker Premium eliminates interference and hum on video lines. The Hum Bucker simply connects in series with the video line
i was at an av company for testing, they didnt propose a hum eliminator. They told me it was the nature of the screen quality. Strange... . It was only one monitor and we will use 20, so i will certainly need something.Quote:
Originally Posted by samsc
The trembling looks like with a computer CRT when the refresh rates is going for example from 85 to 75 to 60Hz.
Output resolution : first tried 720x576 mix size and then 800x600. The image stayed the same with the apple-video adaptor but when connected with the scan convertor we could fill the whole screen but only with res set to 800x600 because we could the manipulate the over-underscan things.
did you try on another screen?Quote:
Originally Posted by Peter
you set it to 25/50hz for pal?
noQuote:
Originally Posted by samsc
I put the screen pref mac os on 800x600 50Hz and the lowered it to pal 50Hz and it got more blurryQuote:
Originally Posted by samsc
what do you mean more blurry?Quote:
Originally Posted by Peter
did you set it to deinterlace?
maybe you got the field order wrong?
maybe you didnt deinterlace the image?
Like with refresh rates from crt monitors, image is shaking a little bit more when going from 85 to 60HzQuote:
Originally Posted by samsc
Where do you mean in QT or on screen prefs mac os?Quote:
Originally Posted by samsc
The original movies are photojpegs 75% 400x400, i know i need to add pixels but it's an existing show whith a new concept.
I tried dvpal with scanmodus interlaced. I will try dvpal with deinterlace video from MPEG streamclip.
I can load them in FCP and fiddle with that but because the original movies where in photojpeg i dont really know.Quote:
Originally Posted by samsc
If it wasnt done with the original i suppose it hasnt been done. What's the easist way of doing so?Quote:
Originally Posted by samsc
you have a pal tv?Quote:
Originally Posted by Peter
an old crt model?
No, thats the trouble, i've only seen it at the av company but i will try to get one. Could i also compare this on a pal tv?Quote:
Originally Posted by samsc
For comparison, the crt monitor is a lacie 19blueIIIQuote:
Originally Posted by samsc
Btw, i mentioned the original movies where photojpegs but i converted them from avi (cinepak codec) and swf to photojpeg.
So should i deinterlace photojpegs when showing them on a tv screen or monitor because those are interlaced displays? I'm still learning...
Thanks!