Archived from groups: microsoft.public.windowsxp.video (
More info?)
Cari,
> An uncompressed AVI will take
> up approximately 12gb of hard drive space per hour.....
Sorry for the intrusion but I have seen this statement of yours in reply to
many other messages... and it has been bugging me for a while. May I ask why
do you consider that uncompressed AVi file would take only 12gb per hour ?
I suspect you are referring to DV AVI files which take up about that size.
However DV AVI is a compressed file format and on top of that it is a
"lossy" file format.
The true uncompressed avi as in "Unocmpressed RGB" using null codec would
result in huge file sizes which can be calculated as follows:
One RGB pixel = 24bits = 3bytes
For an NTSC movie of 720x480 @ 30fps
A single frame would take = 3x720x480 = 1036800 bytes = 0.988 Mb
One hour of movie would take = 3600*30*0.988 Mb = 104.284 Gb
(assuming 1024bytes=1Kb, 1024Kb=1Mb, 1024Mb=1Gb)
Which is about 8 times the DV-AVI file size (13Gb/hour)... Calculation for
PAL is no different.
Please correct me if there is any error in above assumptions/calculations.
--
Rehan
www.rehanfx.org - get transitions and effects for Windows MovieMaker
"Cari (MS MVP)" <Newsgroups1@coribright.com> wrote in message
news:eWVSIf5hEHA.3320@TK2MSFTNGP11.phx.gbl...
> AVI files can be compresed or uncompressed. An uncompressed AVI will take
> up approximately 12gb of hard drive space per hour.....so you probably
> won't
> find many online - and if you did, you probably wouldn't try downloading
> them.
>
> So we come to the conclusion that the AVI file you want to play is
> compressed... and in order to be able to play it, you need to know which
> particular codec it is compressed with.
>
> Happily someone wrote something that will help
> http://www.headbands.com/gspot/
>
> Let G-Spot analyze the AVI and once you know which codec encoded and
> compressed the file, you can download them, install them and the file will
> play.
> --
> Cari (MS-MVP Windows Client - Printing, Imaging & Hardware)
> www.coribright.com
>
> "Bruce" <anonymous@discussions.microsoft.com> wrote in message
> news:337b01c48790$20bf60f0$a301280a@phx.gbl...
>>
>> I wish I knew. It could have been something that adaware
>> caused or it could have been the install of Intervideo
>> Winproducer or microsoft movie maker. I'm not really
>> sure has I do not watch a lot of videos on my PC, so when
>> I discovered it, as much as a month could have gone by.
>> I just ran a test just to make sure I was clear on the
>> facts:
>>
>> All formats show up black in Media player
>> All .avi formats result in errors with Media PLayer,
>> Quicktime and realplayer
>>
>> .mov and .qt play correctly in realplayer and Quicktime
>>
>> I just dont know where to start
>>
>>
>>
>>
>>>-----Original Message-----
>>>What are the file extensions of the videos?
>>>
>>>What happened during the time period between when these
>> files played
>>>correctly and now?
>>>
>>>--
>>>Cari (MS-MVP Windows Client - Printing, Imaging &
>> Hardware)
>>>www.coribright.com
>>>
>
>