Recently, there are many movie clips compressed with mpeg-4 algorithm on the internet. In order to play these movie clips, we must first install the corresponding decoding driver. divx format movies need to install divx decoding program; smr format movies need to install smr decoding program. Because these decoding programs are written according to the windows multimedia interface specification, after installation, windows media player can call them to play mpeg-4 movies. The characteristic of windows media player is that it is simple and convenient to use, but it is not a special mpeg-4 player after all, it does not support displaying subtitles of mpeg-4 movies, if you want to display subtitles during playback, you must use some special mpeg-4 Player, let's compare some popular mpeg-4 players. It should be noted that before using these players, the aforementioned decoding driver must also be installed, otherwise they will not play mpeg-4 movies.

● divx player

divx player is currently a popular divx mpeg-4 player. The latest version of the 0.08 user interface is shown in Figure 1. Figure 2 is a screenshot of a mpeg-4 movie clip played in a window. The lower part of the window is Where to display subtitles.

The characteristics of divx player are small size, easy to use, and fast update speed. Although it has few functions, it supports the divx file format best, which is beyond the reach of other players. divx player has better support for subtitles, allowing users to adjust the frame delay of subtitles, so that subtitles and movies can be played better in synchronization. In full-screen mode, users can click the right mouse button and select the 16: 9 or 4: 3 aspect ratio from the pop-up menu to obtain the best viewing effect.

figure 1

The disadvantage of divx player is that the size of the picture window cannot be adjusted arbitrarily. When the slider is dragged to fast forward or backward, the reaction speed is relatively slow. As far as stability is concerned, the divx player is the best of several mpeg-4 players. The author only found that the program will crash when the wrong subtitle file is selected. In other cases, there are better error handling measures.

● microdvd

microdvd is actually a dvd player that supports divx mpeg-4. Figure 3 is the user interface of microdvd v1.0. The luxurious and powerful interface is the first impression of microdvd. It provides users with quite a few options. For example, users can create playlists or set bookmarks. They can use a dedicated remote control to control the playback process. These are other mpeg- 4 Features that the player does not currently have. In the configuraTIon menu of microdvd, a lot of options can be customized, such as the display mode of subtitles, parameters of divx decoding driver, etc. These functions greatly enhance the flexibility of microdvd. In addition, microdvd also defines shortcut keys for most buttons. Another very popular function of microdvd is to support ini configuration. Users can use the ini editor provided by microdvd to customize various options for playing a movie. In the future, as long as the ini file is opened, the corresponding movie can be played. The command line function on the microdvd can be used to create mpeg-4 discs that support automatic playback. In addition, microdvd also has a quick execution method called "quickini", as long as the user selects the video, audio and subtitle files, they can start playing.

figure 2

Although the function of microdvd is very powerful, there are still some problems and shortcomings. For example, it can not adjust the size of the picture window arbitrarily, and it cannot be displayed in full screen mode on some machines. After the file format, it may not exit normally.

image 3

● gdivx player

Figure 4 is the user interface of the latest version 1.7.0 of gdivx player. This mpeg-4 player is characterized by a simple and clear interface. Its opTIon menu can set the frame rate of subtitles. Usually most subtitles are displayed at 25 frames per second. If there are movies and subtitles during playback Not synchronized, you can use this option to adjust the frame rate. The subtitle window and screen window of gdivx player are independent of each other, and the user can arrange the positions of the two windows arbitrarily. gdivx player supports to adjust the size of the screen arbitrarily according to the original ratio, and the effect of the screen after zooming is also good.

Relative to microdvd, the function of gdivx player is very simple, it can not adjust the volume size, the screen zoom can only be carried out by dragging the window border, can not be quickly switched to full-screen mode by clicking a button, in addition to full-screen In this mode, the independent subtitle window may block part of the picture, which affects the viewing effect.

Figure 4

● miniplayer

Miniplayer can be called the smallest mpeg-4 player at present. Its latest version 0.0.6 is only 119kb and compressed is only 37kb. Figure 5 is the user interface of miniplayer 0.0.6.

Figure 5

Although the miniplayer is small, the basic playback functions are complete. It supports arbitrary adjustment of the size of the picture, including widening or lengthening. The effect of the picture after adjustment is good. But perhaps it is precisely to achieve this arbitrary zoom function that the playback speed of the miniplayer is affected to a certain extent. The author can feel the weak frame skipping phenomenon even on the pâ…¢ 450mhz machine. In addition, miniplayer's support for subtitles is relatively weak, and it can only recognize submagic format subtitle files for the time being.

● bsplayer

The user interface of the latest version of bsplayer 0.63 is shown in Figure 6. From the appearance point of view, the interface of bsplayer is relatively simple, and there is no special attraction. Most of its options are provided through the associated menu. Right-click the player window or the picture window to call up different associated menus. The control provided by the associated menu is relatively rich. For example, the user can adjust the parameters of the divx decoding driver, change the position of the subtitle display, and set the font and color of the subtitle.

Image 6

The biggest disadvantage of bsplayer is that it directly calls the graphics card driver. If the graphics card driver does not support some functions, the playback speed will become very slow, and the effect of scaling the screen is relatively poor. In addition, bsplayer displays the subtitles directly on the screen, which will affect the viewing effect.

It may be because the mpeg-4 movie has just appeared, and the mpeg-4 player has not really matured. The mpeg-4 players introduced above have their own advantages and disadvantages. No one can be in all aspects. The performance is very outstanding, in general, the microdvd, divx player and gdivx player are relatively good players, friends may wish to try.

General Inductor

Usb Common Mode Choke,Magnetic Ring Inductor,Ferrite Core Inductor,Coilcraft Inductor

IHUA INDUSTRIES CO.,LTD. , https://www.ihua-sensor.com