压缩尺寸 [英] Compression size

问题描述

我使用GZipStream类压缩了一个文件，并且比原来的

文件大....这怎么可能？，原始文件是737 KB，压缩是

文件是1.1 MB。我是否错过了压缩等级的东西或是正常的？


-

VBA

解决方案

你在压缩什么类型的文件？某些高度压缩的文件（如

图像）在第二次压缩时可能会增大。此外，Microsoft

算法并不是一个想法，而是试图避开专利

问题。


" VBA" < VB*@discussions.microsoft.com写信息

新闻：BB *************************** ******* @ microsof t.com ...

>我用GZipStream类压缩了一个文件并且比原来大了

file ....这怎么可以？，原始文件是737 KB，

压缩

文件是1.1 MB。我是否错过了一些或正常的压缩

级？


-

VBA

首先我压缩了一个txt文件，我读到如果文件非常小，

压缩可以把它变大，所以我试着用一个mp3文件（不是

确定文件类型很重要）的3.4 Mb，但是把它变成了5.3

MB ....所以.. ......什么是错的？


-

VBA

" Andrew Robinson"写道：

你压缩什么类型的文件？某些高度压缩的文件（如

图像）在第二次压缩时可能会增大。此外，Microsoft

算法并不是一个想法，而是试图避开专利

问题。


" VBA" < VB*@discussions.microsoft.com写信息

新闻：BB *************************** ******* @ microsof t.com ...

我用GZipStream类压缩了一个文件，并且比原来的大了

file ....这怎么可以？，原始文件是737 KB，

压缩

文件是1.1 MB。我是否错过了一些或正常的压缩

级？


-

VBA

VBA写道：

首先我压缩了一个txt文件，我读到，如果一个文件非常小，

压缩可以把它变大，所以然后我尝试用一​​个mp3文件（不是

确定如果文件类型重要的是3.4 Mb，但是把它变成了5.3

MB ....所以.....什么是错的？

MP3是一个压缩文件...我敢打赌你会用3.5

MB文本文件获得更好的行为。


Scott

I compressed a file with GZipStream class and is larger than the original
file.... how can this be?, the original file is 737 KB and the "compressed"
file is 1.1 MB. Did i miss something or is normal with that compression class?

--
VBA

解决方案

What type of file are you compressing? Some highly compressed files such as
images may grow in size when compressed a second time. Also, the Microsoft
algorithms are not idea but rather make an attempt to steer clear of patent
issues.

"VBA" <VB*@discussions.microsoft.comwrote in message
news:BB**********************************@microsof t.com...

>I compressed a file with GZipStream class and is larger than the original
file.... how can this be?, the original file is 737 KB and the
"compressed"
file is 1.1 MB. Did i miss something or is normal with that compression
class?

--
VBA

First I compressed a txt file, i read that if a file is very small , the
compression can turn it larger in size, so then i tried with a mp3 file (not
sure if the file type matters) of 3.4 Mb, but turned it to 5.3
MB....so.....what''s wrong??

--
VBA
"Andrew Robinson" wrote:

What type of file are you compressing? Some highly compressed files such as
images may grow in size when compressed a second time. Also, the Microsoft
algorithms are not idea but rather make an attempt to steer clear of patent
issues.

"VBA" <VB*@discussions.microsoft.comwrote in message
news:BB**********************************@microsof t.com...

I compressed a file with GZipStream class and is larger than the original
file.... how can this be?, the original file is 737 KB and the
"compressed"
file is 1.1 MB. Did i miss something or is normal with that compression
class?

--
VBA

VBA wrote:

First I compressed a txt file, i read that if a file is very small , the
compression can turn it larger in size, so then i tried with a mp3 file (not
sure if the file type matters) of 3.4 Mb, but turned it to 5.3
MB....so.....what''s wrong??

MP3 is a compressed file... I bet you''d get better behavior with a 3.5
MB text file.

Scott

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