Re: New version supporting PAL

ike relucio (ike_relucio@cyberdude.com)
Sun, 8 Mar 1998 02:18:44 +0800


it shouldn't matter what the original source of the video is --- if you have
a PAL camera, just make sure you have a capture card that accepts PAL video,
if you have an NTSC camera, get a NTSC capture card

what is important is that the capture card driver provides video to the
application using Microsoft Video for Windows format --- this holds true for
all other capture devices like parallel port cameras, etc...

if your video capture card cannot provide that format to cu-seeme, you won't
be able to send video

-----Original Message-----
From: Sam Huston <Samhuston@worldnet.att.net>
To: CU-SEEME-L@cornell.edu <CU-SEEME-L@cornell.edu>
Date: Saturday, March 07, 1998 02:39 PM
Subject: New version supporting PAL

>>On Thu, 5 Mar 1998, Adrian Close wrote:
>>> This is purely an issue with your capture card, and not really anything
to
>>> do with CU. Your capture card converts the analog video signals to a
>>> digital data stream.
>>>
>>> CU just gets digitised video via hardware driver from the capture card -
>>> it doesn't know or care what the capture card's input was.
>>
>>I don't believe this to be true.
>>>From http://cu-seeme.cornell.edu/V32X/capturecards.html:
>> A Note on Cameras
>>
>> Currently, this version of CU-SeeMe only supports NTSC cameras. I
>> know, the Win16 version did PAL, but PAL support, for both big and
>> small video will be forthcoming.
>>--------------------------------------
>>
>>The version of CU has to change each format from a card into another
>>format. If this wasn't the case, then ANY capture card using ANY
>>format would work with the Cornell version.
>>
>>I don't know the details, but I believe PAL standards have different
>>resolutions than NTSC, so that also has to be dealt with to get it to
>>160x120/320x240/etc... I could be off though.
>
>I think this is correct. My cousin came from Germany with a PAL camcorder.
>The pictures would not play on our NTSC televisions without a lot of
>modifications. & then would play with a lot of static & no sound (like the
>static in slow motion on some VCRs)
>>
>>That would lead me to believe that it's a function of the software.
>>Afterall, the software is what has to convert the video format into
>>something acceptable to CU. (ie: it has to convert a lot of formats into
>>what CU uses). I believe DirectX/ActiveX changes this notion, but I don't
>>really know.
>>
>>> So yes, effectively CU supports both NTSC and PAL input, and users with
>>> NTSC and PAL format video input can talk to each other...
>>
>>If the software supports both NTSC and PAL formats, then communicating
>>with the opposite format should be transparent.
>
>Are you sure about this? Is there anyone who's familiar with this & knows
>for sure? Is there anyone using a PAL camera who wants to videoconference
>to see if it works?
>
>Thanks for any & all help!
>
>Debbie
>___
>A|M Wannabee Mom
>
>___
>A|M Wannabee Mom
>
>