In the world of digital technology, video files can be considered one of the most difficult and bulky, and sometimes it becomes necessary to compress them. However, as a rule, a decrease in size leads to a loss of quality of the resulting product. But you can minimize it or even try to completely avoid it. Very often, users simply come to a standstill when they first encounter the digitization of video. It seems strange that a regular video lasting only half an hour can take about ten gigabytes. And if there are several such clips, then no disks will be enough to store them. Is there any way how to compress video without quality loss?
Yes, this can be done using the VirtualDub program. Using the built-in codecs, the sizes of video clips can be brought to quite acceptable, and at the same time not to lose image quality. This program is free, and it can be easily downloaded either from the developers website or from any of the free software directories. In addition, VirtualDub has a Russian-language interface for a long time, therefore, understanding this program will not be difficult at all.
Before you compress a movie without losing quality, you need to open it in the installed program, which is discussed above. The first frame of the video you uploaded will open in its window. Leave the audio track as is, without any changes. To do this, click the Audio menu item and click Direct stream copy. To process the video stream, you need to click the buttons Video and Full Processing mode.
The next step, how to compress video without losing quality, is the choice of codec type for compression. The best choice would be DivX. He can compress films without damaging their quality. In addition, the clip obtained in this way can be played back not only on a computer, but even on an ordinary home DVD player. Therefore, once again click on the Video and Compression buttons, and in the list of codecs that appear, select DivX Pro 5.0.3 Codec. Confirm your choice by clicking on the Configure button.
In the course of the procedure, how to compress video without losing quality, you should open an additional window to configure the selected codec. Check the Profile tab, it should be opposite the Use Bidirectional Encode option. Now you need to go to the General Parameters tab and set the values of all the sliders there to Normal.
Next, on the Bitrate Parameters tab, first select Multipass, 1st pass, which means "Multipass compression, 1st pass." After that, you need to set the bitrate parameters: the higher it is, the better the quality of the compressed video will turn out. All other parameters must be left unchanged. Next, click OK once and then again.
The long-awaited moment has come: the next step is precisely how to compress the video without losing quality. Select File from the menu, followed by Save as AVI. Upon completion of the operation, you will get a small file on the output, only this is just streaming information, but not video yet. Now you need to enter the codec settings again, which are on the tab called Bitrates Parameters, and this time stop the selection on the Multipass, nth pass item, which should be understood as “Multipass compression, nth pass”. Double click OK again and save the movie in AVI format again. Such double processing of the video as a whole will require a little more time, however, the clip will not lose any quality, but its volume will decrease by several orders of magnitude at once.
If you do not know how to compress AVI without losing quality, then try the following in the same program: first, stop at the Xvid MPEG-4 Codec from the codec list and click Configure. Switch to Target bitrate mode by clicking on the Targetquantizer in a new window and move the slider to the right. After that, in the More field, click on the button of the same name: a new window will appear, where in the Motion search precision menu you need to set 6 - Ultra High, and in WHQ mode 4 do the WideSearch installation. Next, in this and the next 2 windows, click OK. Next, open the video file and convert it by clicking Save as in the File menu.