300MB loaded with two floppy disks
From: Computer Lovers
■ Lian University of Applied Arts Arts
WinRAR is a must-have software for computer users, how can it be used to compress files as possible? Just simply select "best" compression mode? Of course, try this paper, some netizens use this method, compress more than 300 MB files into a 2MB RAR file. Note: 1 Use the high version of WinRAR, you can download the latest WinRAR 3.30 Simplified Chinese version from http://down.96669.com/down/wrar330sc.exe. 2 The method described herein is a method of time-changing space. When compressed with large files, if not necessary, do not use the following methods because it needs to be done with a considerable time.
Check and right-click the file you want to compress, select Add to Compressed Files, select "Create Rad Replerged Compressed File" under the "General" tab, and select "best" under the "compression mode".
Click the "Compression" button under the Advanced tab to open the Advanced Compressed Parameters window. Then proceed as follows: (1) Settings to the compression settings of the program or document file. The "predicted order" under "Text Compression" can be set to "30", "memory usage, MB", of course, you can also set these two values to improve the compression ratio. . Tip ★ When the "Text Compression" item is set to "Auto", WinRAR will determine when using text compression based on source data and compression mode; "Force" is applied to all data, but this Need to take up more system resources; "prohibiting" is to block text compression algorithms, which can reduce the occupation of system resources. ★ "Predictive Order" is used to set the prediction order of the PPM algorithm (core algorithm for RAR text compression). 2 to 63 can be filled. You can increase this value to increase compression ratio, but this is based on consumption of a large number of system resources (especially memory). ★ "Memory, MB" is used to set the memory available to the PPM algorithm, which can be set to 1 to 128. Set larger memory can improve the compression ratio, but pay attention to the memory used by PPM compression and decompression. The size is equal, so if you set up 128 when it is compressed, then others may have problems when installing a computer that is below 128MB of memory (even 256MB memory, because the system takes a part of the memory).
(2) For uncompressed audio files. For example, WAV, etc., "channel" under the "Audio Compression" item can be set to "4". Small Tips ★ The "mandatory" term under "Audio Compression" is to apply the audio compression algorithm on all compressed data, but only when the selected file is an uncompressed audio file (such as WAV, etc.) is only valid. ★ "Sound" item is used to set the number of bytes of the channel (can be 1 ~ 31), and the RAR can split the multi-bit channel as a unit channel. For example, two 16-bit audio channels can be viewed as 4 channels of each byte of each width. Set to 0, WinRAR will automatically select the number of channels.
(3) For uncompressed picture files. Such as BMP, TIF, etc., which can be set to "forced" under "real color compression". If you have heard that the BMP format is compressed by RAR format, it is smaller than the JPG file. So, you will try this option, it can help you make them smaller. Tip "True Cruise Compression" is used to process the RGB graphic file, so only when all compressed files are completely RGB format, then activate this. Also this option does not work for files such as JPG.
After setting the above, select "4096" item from the "Dictionary size, KB" drop-down menu under "General Compressed" (if the memory is higher than 64MB, it is recommended to use this item, otherwise it should be set to a smaller value to reduce Memory use), finally, click "OK" to start compression (see Figure).
Reline any smaller text file, reclaim with the compressed compression package, please refer to Step 1 and STEP 2, just when setting "Dictionary size, Kb", select "2048". In actual use, you may find that the value provided herein is not the best, because different data, due to the settings, generate different compression ratios, so if you ask as small data, then you can try more Compression of times. Xiaobian has something: One point to mention that if the compressed file is not big, then Xiate recommends that you try this paper, which will effectively reduce the occupancy of space.
