[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.00,0:00:03.90,Default,,0000,0000,0000,,Hello. I'd like to speak with you today\Nabout creating a compressed folder in
Dialogue: 0,0:00:03.90,0:00:07.86,Default,,0000,0000,0000,,Windows 7. Before I do that, however, I'd\Nlike to talk a little bit about
Dialogue: 0,0:00:07.86,0:00:13.92,Default,,0000,0000,0000,,compression. First of all, as you know,\Neverything on the computer is
Dialogue: 0,0:00:13.92,0:00:18.96,Default,,0000,0000,0000,,represented in bits. Everything is\Nreducible to zeros and ones -- and by
Dialogue: 0,0:00:18.96,0:00:25.50,Default,,0000,0000,0000,,"everything," I mean text files. I mean\Nprograms. I mean audio. I mean video. To
Dialogue: 0,0:00:25.50,0:00:37.08,Default,,0000,0000,0000,,give you an example, Paint stores images\Nas bitmaps. Each canvas is made up of a
Dialogue: 0,0:00:37.08,0:00:43.05,Default,,0000,0000,0000,,certain number of pixels across and down. Each pixel can be a single color. One pixel
Dialogue: 0,0:00:43.05,0:00:47.99,Default,,0000,0000,0000,,can be red or it can be blue, but it\Ncan't be partly red and partly blue. If
Dialogue: 0,0:00:47.99,0:00:54.12,Default,,0000,0000,0000,,you're dealing with a monochrome image\Nsuch as we have here, you really only
Dialogue: 0,0:00:54.12,0:00:59.76,Default,,0000,0000,0000,,have two choices: black or white. Two\Nchoices can be represented by a single
Dialogue: 0,0:00:59.76,0:01:06.75,Default,,0000,0000,0000,,bit; for example, zero might represent white, one might represent black. So in an
Dialogue: 0,0:01:06.75,0:01:11.76,Default,,0000,0000,0000,,uncompressed format, ordinarily this\Nmight be stored as lots and lots and
Dialogue: 0,0:01:11.76,0:01:16.77,Default,,0000,0000,0000,,lots of zeros to represent all of this\Nwhite, still more zeros more zeros more
Dialogue: 0,0:01:16.77,0:01:22.95,Default,,0000,0000,0000,,zeros, then three black or three -- we've\Ngot three black pixels here, so we've got
Dialogue: 0,0:01:22.95,0:01:29.91,Default,,0000,0000,0000,,three ones, a lot more zeros to represent\Nall this white. Five ones in a row to
Dialogue: 0,0:01:29.91,0:01:35.43,Default,,0000,0000,0000,,represent this next line down -- five black\Nsquares, lots and lots of white squares,
Dialogue: 0,0:01:35.43,0:01:42.96,Default,,0000,0000,0000,,lots more zeros and so on. Imagine,\Nhowever if instead of having to store 00
Dialogue: 0,0:01:42.96,0:01:48.36,Default,,0000,0000,0000,,000 -- a thousand zeros followed by a few\Nones followed by a thousand more zeros
Dialogue: 0,0:01:48.36,0:01:54.00,Default,,0000,0000,0000,,followed by maybe 25 ones, imagine\Ninstead of having to take all those bits
Dialogue: 0,0:01:54.00,0:02:02.04,Default,,0000,0000,0000,,for that, you had some special way of\Nsaying repeat 0 a thousand times.That
Dialogue: 0,0:02:02.04,0:02:05.91,Default,,0000,0000,0000,,special way of representing a thousand\Nzeros would take less space than
Dialogue: 0,0:02:05.91,0:02:11.43,Default,,0000,0000,0000,,representing the series with a thousand\Nbits. This would be an example of a very
Dialogue: 0,0:02:11.43,0:02:17.55,Default,,0000,0000,0000,,simple compression algorithm using this special repeating symbol. Now
Dialogue: 0,0:02:17.55,0:02:22.95,Default,,0000,0000,0000,,in actual practice, the compression\Nalgorithms are far more complex, but this
Dialogue: 0,0:02:22.95,0:02:26.85,Default,,0000,0000,0000,,gives you a feel for how it might be\Npossible to represent the exact same
Dialogue: 0,0:02:26.85,0:02:36.96,Default,,0000,0000,0000,,information in less space. Windows makes it possible to save files of various
Dialogue: 0,0:02:36.96,0:02:43.23,Default,,0000,0000,0000,,types using less space with its built-in\Ncompression. You can create a compressed
Dialogue: 0,0:02:43.23,0:02:47.99,Default,,0000,0000,0000,,folder and then put files into it and\Nthe files -- depending on what is in them --
Dialogue: 0,0:02:47.99,0:02:52.29,Default,,0000,0000,0000,,may very well take up less space; it might be just a little less space, it might be a lot
Dialogue: 0,0:02:52.29,0:02:58.11,Default,,0000,0000,0000,,less space. So for example this "Psych\Nnotes" is nineteen thousand bytes, more or
Dialogue: 0,0:02:58.11,0:03:04.50,Default,,0000,0000,0000,,less, of text. To create a compressed\Nfolder, I could right-click on an empty
Dialogue: 0,0:03:04.50,0:03:09.48,Default,,0000,0000,0000,,spot in this pane just as I would to\Ncreate a regular folder, and -- again, just
Dialogue: 0,0:03:09.48,0:03:13.59,Default,,0000,0000,0000,,as with a regular folder -- I can go to "New," but if instead of choosing "Folder," I
Dialogue: 0,0:03:13.59,0:03:19.92,Default,,0000,0000,0000,,choose "Compressed zipped folder," I will\Ncreate a compressed folder. I can then
Dialogue: 0,0:03:19.92,0:03:25.47,Default,,0000,0000,0000,,give this compressed folder any name\Nthat I like, such as "Notes" (because i'm
Dialogue: 0,0:03:25.47,0:03:30.46,Default,,0000,0000,0000,,going to be putting my notes in here). I\Nclick outside of that area to deselect
Dialogue: 0,0:03:30.46,0:03:37.35,Default,,0000,0000,0000,,"Notes." I'm then going to right-drag and\Ndrop my "Psych notes" on to my "Notes"
Dialogue: 0,0:03:37.35,0:03:41.97,Default,,0000,0000,0000,,folder. By right-dragging rather than\Ndragging, I can choose whether I wish to
Dialogue: 0,0:03:41.97,0:03:47.43,Default,,0000,0000,0000,,copy the "Psych notes" or to move them. "Copy" is bold, so that's the default. In
Dialogue: 0,0:03:47.43,0:03:52.29,Default,,0000,0000,0000,,point of fact, I do wish to copy; I'm\Ngoing to choose "Copy" here. Now you'll
Dialogue: 0,0:03:52.29,0:03:58.05,Default,,0000,0000,0000,,notice that I've got my original "Psych\Nnotes" that is 19 kilobytes. My compressed
Dialogue: 0,0:03:58.05,0:04:03.72,Default,,0000,0000,0000,,folder is 11 kilobytes; it's a lot\Nsmaller. If I open up my compressed
Dialogue: 0,0:04:03.72,0:04:07.95,Default,,0000,0000,0000,,folder, I can see a "Psych notes" listed in\Nhere, and I can double click on the "Psych
Dialogue: 0,0:04:07.95,0:04:16.08,Default,,0000,0000,0000,,notes." When I do that, you see that Word\Nopens in read-only mode; that's one of
Dialogue: 0,0:04:16.08,0:04:21.60,Default,,0000,0000,0000,,the disadvantages of compression -- we\Ndon't just compress everything that
Dialogue: 0,0:04:21.60,0:04:26.34,Default,,0000,0000,0000,,we're working with partly because if we\Nwant to make any sort of changes,
Dialogue: 0,0:04:26.34,0:04:31.17,Default,,0000,0000,0000,,we're going to be having to\Nextract the file from our compressed
Dialogue: 0,0:04:31.17,0:04:36.39,Default,,0000,0000,0000,,folder. We're going to have to decompress\Nthe file -- restore to the original size --
Dialogue: 0,0:04:36.39,0:04:41.25,Default,,0000,0000,0000,,make changes, and then we could put the\Nmodified file back into a compressed
Dialogue: 0,0:04:41.25,0:04:46.08,Default,,0000,0000,0000,,folder, if we wished. The other downside\Nof working with a compressed object is
Dialogue: 0,0:04:46.08,0:04:52.20,Default,,0000,0000,0000,,that it's going to take a little bit\Nlonger to do any sort of processing, but
Dialogue: 0,0:04:52.20,0:04:58.86,Default,,0000,0000,0000,,if I do wish to extract this file again,\Nif I just want to open it I could choose
Dialogue: 0,0:04:58.86,0:05:06.42,Default,,0000,0000,0000,,to open it here. If I come up to the\Nfolder above my compressed folder so I
Dialogue: 0,0:05:06.42,0:05:10.92,Default,,0000,0000,0000,,can see the compressed folder, I can\Nright-click on it and choose to "Extract
Dialogue: 0,0:05:10.92,0:05:17.01,Default,,0000,0000,0000,,All." I'm going to be asked where would\Nyou like to place the extracted file,
Dialogue: 0,0:05:17.01,0:05:23.25,Default,,0000,0000,0000,,and by default it will be\Nplaced in the same folder as the one that
Dialogue: 0,0:05:23.25,0:05:27.39,Default,,0000,0000,0000,,contains the compressed folder. So I'll\Nleave the default here. I'm not going to
Dialogue: 0,0:05:27.39,0:05:32.49,Default,,0000,0000,0000,,browse to any different location, and I\Ndon't want to see the extracted files
Dialogue: 0,0:05:32.49,0:05:37.95,Default,,0000,0000,0000,,when complete. I'll just say "Extract," and\Nnow you'll see we have a new,
Dialogue: 0,0:05:37.95,0:05:44.76,Default,,0000,0000,0000,,uncompressed folder called "Notes." The compressed one has an icon
Dialogue: 0,0:05:44.76,0:05:50.07,Default,,0000,0000,0000,,that has a zipper on it; regular folders\Ndo not have the zipper. If you are
Dialogue: 0,0:05:50.07,0:05:55.08,Default,,0000,0000,0000,,showing your file types, compressed\Nfolders have the file type or the
Dialogue: 0,0:05:55.08,0:06:04.53,Default,,0000,0000,0000,,extension of "zip." Uncompressed ones\Ndon't have any visible extension. So what
Dialogue: 0,0:06:04.53,0:06:08.49,Default,,0000,0000,0000,,are the main points with creating a\Ncompressed folder and using it? To create
Dialogue: 0,0:06:08.49,0:06:14.46,Default,,0000,0000,0000,,it, you can right-click on a blank part\Nof the window-->New-->Compressed (zipped)
Dialogue: 0,0:06:14.46,0:06:18.96,Default,,0000,0000,0000,,Folder. Give it whatever name you'd like.\NPlace in it anything that you'd like to
Dialogue: 0,0:06:18.96,0:06:23.76,Default,,0000,0000,0000,,have compressed. When you wish to make use of the items. if you just want to see
Dialogue: 0,0:06:23.76,0:06:26.55,Default,,0000,0000,0000,,the contents, you don't want to make any\Nchanges, you're not doing anything all
Dialogue: 0,0:06:26.55,0:06:30.45,Default,,0000,0000,0000,,that extensive, you can work with the\Ncompressed version. If you do wish to
Dialogue: 0,0:06:30.45,0:06:36.72,Default,,0000,0000,0000,,make changes, you do wish to do\Nextensive processing, you're going to be
Dialogue: 0,0:06:36.72,0:06:41.58,Default,,0000,0000,0000,,needing to right-click on the folder and\Nchoose "Extract All."
Dialogue: 0,0:06:41.58,0:06:45.81,Default,,0000,0000,0000,,If you don't wish to extract everything,\Nanother thing you could do is you could
Dialogue: 0,0:06:45.81,0:06:52.23,Default,,0000,0000,0000,,come into the folder copy the item that\Nyou wish to extract. If I had 10
Dialogue: 0,0:06:52.23,0:06:56.40,Default,,0000,0000,0000,,different items in here and I only wished\Nto extract the "Psych notes," I could
Dialogue: 0,0:06:56.40,0:07:00.78,Default,,0000,0000,0000,,right- click on psych notes and choose "Copy," go wherever I like to paste it,
Dialogue: 0,0:07:00.78,0:07:07.26,Default,,0000,0000,0000,,right-click and choose "Paste." Now I already have a file of this name -- my original
Dialogue: 0,0:07:07.26,0:07:11.52,Default,,0000,0000,0000,,file-- in here, so Windows has asked me\Nwhat do I want to do: Do I
Dialogue: 0,0:07:11.52,0:07:17.52,Default,,0000,0000,0000,,really wish to replace the original with\Na copy, do I wish to say "Don't copy," or
Dialogue: 0,0:07:17.52,0:07:21.17,Default,,0000,0000,0000,,I'm going to copy but keep both files,
Dialogue: 0,0:07:21.32,0:07:27.45,Default,,0000,0000,0000,,and in theory I should be seeing a\Nsecond copy in here. I'm not sure why I'm
Dialogue: 0,0:07:27.45,0:07:37.26,Default,,0000,0000,0000,,not, but in theory I should be. Okay I'm\Nnot sure why I hadn't been seeing the
Dialogue: 0,0:07:37.26,0:07:42.11,Default,,0000,0000,0000,,second copy; I just refreshed the screen\Nand now you can see the second copy.
Dialogue: 0,0:07:42.11,0:07:46.13,Default,,0000,0000,0000,,Thank you very much. Goodbye