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Renaming files in DOS

Operating systems : MS-DOS 6.0+ [ 1 ]

Renaming files in DOS by REN command

REN FILE1.TXT FILE2.TXT

- Renames FILE1.TXT into FILE2.TXT

REN FILE1.TXT FILE2.HTM

- Renames FILE1.TXT into FILE2.HTM

REN *.TXT *.HTM

- Renames all files with .txt extension into files with .htm extension. Only extensions are changed, the file names proper are left as they were.

Since REN is the shorter form of RENAME command, RENAME may be used instead - as more self-explaining may be.

Renaming files in DOS by MOVE command

MOVE FILE1.TXT FILE2.TXT

- Renames FILE1.TXT into FILE2.TXT

MOVE FILE1.TXT FILE2.HTM

- Renames FILE1.TXT into FILE2.HTM

Both methods of file renaming work in Windows command prompt as well. But there is a certain distinction: MS-DOS, other typical / older DOS'es, command prompt of Windows prior to Windows 95 and Windows NT 3.51 use a short filename / 8.3 filename convention. So, for example, REN FILE1.HTM FILE1.HTML is not going to work, there will be "Duplicate file name or file name not found" message. And that is not the case with newer DOS'es or command prompt of newer Windows. It can be not the case in older DOS'es also - if relevant drivers are installed.


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MS-DOS 6.0+ tested - but it also may happen to work well under other versions of MS-DOS or other DOS'es.


Aliosque subditos et thema

 

Split video file. FFmpeg

 

Split video file by ffmpeg: There are two ways how to split video files by ffmpeg. The first one is good in itself, more than that - it is faster, but sometimes creates output files with certain flaws. So for those cases there is the second way of splitting video files: it is considerably slower, the output files are bigger, but it seems they are always of the same quality level as input files used. Way : 1 ffmpeg -ss <start> -t <duration> -i in1.avi -vcodec copy -acodec copy out1.avi Way : 2 ffmpeg -ss <start> -t <duration> -i in1.avi -sameq out1.avi - <start> - the beginning of the part of a video ffmpeg is to cut out. Format: 00:00:00 - hours:minutes:seconds - hh:mm:ss - <duration> - the duration of the part of a video ffmpeg is to cut out. Format: 00:00:00 - hours:minutes:seconds - hh:mm:ss Examples ffmpeg -ss 01:19:00 -t 00:05:00 -i in1.avi -vcodec copy -acodec copy out1.avi ffmpeg -ss 01:19:00 -t 00:05:00 -i in1.avi -sameq out1.avi - ffmpeg cuts out a part of the video file starting from 1 hour 19 minutes 0 seconds. The duration of the video sequence cut out is 5 minutes 0 seconds. About ffmpeg: ( Home page ) ( List of supported file formats and codecs )

CSS horizontal and vertical centering - 2

 

Centering the content of a web page in the viewable area of a browser by means of CSS. A box to contain the whole content of the page is CSS centered horizontally and vertically: [ Open demo page ] HTML / XHTML. Code: <!DOCTYPE html> <html> <head> <title>CSS horizontal and vertical centering - 2</title> <link rel="stylesheet" type="text/css" href="css.css" /> </head> <body> <div class="spacer">&nbsp;</div> <div class="wrapper"> <div class="pagecontent">&nbsp;</div> </div> </body> </html> CSS. Code: html {height: 100%; margin: 0px;} body height: 100%; margin: 0px;} .spacer {position: relative; top: 0px; left: 0px; height: 50%; width: 100px; float: left; margin: 0px 0px -250px 0px; background: #999;} .wrapper {position: relative; top: 0px; left: 0px; height: 500px; width: 100%; clear: both; background: #a3ddc4;} .pagecontent {position: relative; top: 0px; left: 0px; height: 500px; width: 800px; margin: 0 auto; background: #ff6f6f;} The .pagecontent box is for the page content. It must be of a fixed height and width in units like px's or em's - not in percents. Height and width may be larger than web browser viewable area, but here the more practical case is discussed - when the height and width of .pagecontent are smaller than those of the web browser viewable area. The .pagecontent box is horizontally centered by its "margin: 0 auto". .Wrapper creates a space where .pagecontent is centered horizontally. .Wrapper's width is 100% for centering at various web browser viewable area sizes. The height has to be equal to the one of .pagecontent. .Spacer centers .wrapper with .pagecontent in it vertically inside browser viewable area. Its width may be any. The height is 50% - that places the top edge of .pagecontent vertically in the middle of the browser viewable area. The bottom margin of .spacer equal to half the .pagecontent height centers .pagecontent and its contents vertically in the web browser viewable area of a current height. This method is reliable in all major modern web browsers. It also works in older browsers like Internet Explorer 6 or earlier versions of Maxthon. But the height of box for page content has to be assigned explicitly and if it is changed - the size of .spacer bottom margin must be changed accordingly as well. There is another way of CSS horizontal and vertical centering, with CSS code easier to maintain, even if not suitable for older web browsers: CSS horizontal and vertical centering - 1. [ 1 ] As well as Netscape 7.2+, Mozilla 1.5+. [ 2 ] As well as Netscape 7.2+, Mozilla 1.5+.