Re: e-journals portal
- From: "Carsten Troelsgaard" <carstenNOSPAM.Troelsgaard@xxxxxxx>
- Date: Tue, 2 May 2006 09:57:23 +0200
"Aidan Karley" <doIlookDAFTenoughTOpost@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
skrev i en meddelelse
news:VA.00000e16.1a402d97@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
In article <1256o5rhhv49j37@xxxxxxxxxxxxxxxxxx>, Jo Schaper wrote:
This is good. I'm not a digiexpert, but I've seen a bunch of ads forSevere confusions of terminology going on here (and this isn't
MP3 videos, and MP3 players in the states now play videos.
really the group to debate these issues on). The MP3 audio encoding is
in a manner defined by the Motion Pictures Expert Group (MPEG) as the
3rd level of it's audio specification, hence "MP3". But this *only*
specifies how to handle audio data. "MP3 video" devices play compressed
(low frame rate and low resolution) video files that (typically) contain
MPEG level-4 compressed video and an audio stream. There is some sort of
registration that keeps the video and audio in synchrony (at least as
well as the original lip-synching allows). For comparison, if I
understand DVDs correctly, their .VOB files contain an interleaved
MPEG-2 video stream and a audio stream in a format I've forgotten. Oh
bugger, acronym soup!
Carsten's saying that the video original is "WMV" format doesn't
say a lot
The raw vidio is shot as HDV, high definition video - it has something like
1000 scanlines instead of 500 which (probably) an ordinary tv uses. I can
only import into my pc as SD (through 'Movie Maker'), standard definition.
It's virtues are 2079 kbps and 640x480 pixels. The SD stores something like
a gig an hour.
- there are I-don't-know how many subvariants of the "WMV
format". There is a likelihood that it can be re-encoded into a more
compact format, but it's a horribly complex subject that I've always
solved by the simple process of taking the files round to "Pete the
Pervert" and getting him to do the re-encoding of me.
Carsten, How long is the video, how many frames per second, and
what are the dimensions of the image (in pixels)? From that, you should
be able to work out the uncompressed size of your video, and how much it
has been compressed by. Compressing video by a factor of 10 (viz 700MB
of raw video becomes 70MB of processed video) shouldn't tax any
programs, but getting a factor of 20+ would probably require
irreversible compression, in which some of the video data is thrown
away, and cannot be recovered.
I've got a software-thingie fresh from the free side of the net - with loads
of odd codex. I'm pretty sure that I can save in a smaller format. I have
confidence in how jpeg's handles this sort of problem, so I'll look into it.
I've been returning to my shot-site, so the required editing makes it an
unhasty problem. I appreciate your input.
Take a peak at (names start with Snapshot)
http://www.sitecenter.dk/geocsite/geologicamshots/
Carsten
.
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