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6

5GB for 30 mins of HD data is already highly compressed - a raw 1080p is stream is in the order of magnitude of 50 times that size. - It seems that your expectations may be unrealistic, or that you need to trade off quality for a smaller filesize. (Not sure if/how you can do that on an ipad - I suspect you can't - at least not unless you stop recording ...


5

The ARM CPUs in mobile devices are less powerful than their desktop counterparts even if their frequency is the same (you can't compare them), and even desktops still struggle with on the fly video encoding, that's why you can play a game smoothly at 60 FPS but as soon as you start a screen recording program your frame rate drops significantly (and GPU ...


4

According to the gzip man page, using the -N or --name option when using gunzip recovers the original file name. -N is the default when compressing (so gzip always saves the original file name) but not when decompressing so it has to be used explicitly with gunzip. I tested this as follows: $ ls test.txt $ gzip test.txt $ ls test.txt.gz $ mv test.txt.gz ...


2

Why this scanned book image has no background? Whoever produced it set it's background to be transparent. This is a feature of several image file formats. sometimes it is referred to as an alpha channel (which provides degrees of transparency) some tools/formats simply allow for one color to be selected and marked as fully transparent. GIF supports ...


2

You may find that HIBERFIL.SYS (a hidden system file) is taking up a lot of space on your main (internal) hard drive. If you want to reclaim this space at the cost of not being able to hibernate your PC any more you can follow these instructions: How to disable hibernation Alternatively you can run the following from a Command Prompt which is running in ...


1

No, the transfer over USB using MTP itself does not compress the images or other files. Of course, your phone's implementation of MTP may do this, or the software you use to receive the files on your computer - but that is unlikely, unless you explicitly enabled it somewhere. There must be another reason your images look more pixelated on the computer. ...


1

atool is designed for this job. A copy of the man page is available here. To compress files use apack ARCHIVE FILE and to decompress them use aunpack ARCHIVE (alternatively you can use atool -a and atool -x respectively). It works with pretty much any archive format you can think of including gzip, bzip, lzip, 7z, rar, ar, deb, rpm, jar[1] and most ...


1

Try this tool I wrote called Leanify. It will not only recompress zip file but also try to optimize supported files inside zip.



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