In the process of development using dargonbaord 410c, many times we want to use video to pass our information, realistic short messages, today we will introduce a very good video playback software - mplayer, this software is a Very classic open source software, can be easily controlled by commands, video playback, and convenient for users to integrate into their own programs and systems for video playback.
The first is the installation of mplayer on the dragonboard 410c. Here in the debain system, we only need to install it via apt-get. The specific commands are as follows:
Apt-get install mplayer
If you get an error, or if you are prompted to change the software, execute the following command to update your source:
Apt-get update
Apt-get upgrade
After the update is complete, execute apt-get install mplayer.
After the installation is complete, run the mplayer command, the following prompt will appear, indicating that you have successfully installed
Running mplayer we can see a lot of help and command prompts, it's very simple, just run mplayer filename to play video, but if you run directly on dragonboard 410c, you will get an error, as follows:
Here is because our graphics card problem is wrong, and the mpalayer configuration does not match. Everyone knows that the debainx system on the dragonboard 410c uses the X11 display system. Here we can simply modify our running command to realize the video playback. as follows:
Mplayer -vo x11 filename
After running, you can see that the video player has been successfully launched and our video has been played.
After the playback is finished, the system will automatically close and exit. If you need to play multiple messages during processing, you can use the -playlist command option, so you can play multiple videos continuously, as follows
Mplayer -playlist filename1 filename2
You can also use the Python script to launch the video player for video playback as follows:
Import os
Os.system("mplayer -vo x11 filename")
Through this command, we can easily call mplayer for video playback during the design of the python program.
Pay attention to the use of paper-like film.
Although the screen is easier to get dirty with paper-like film and the resolution will decrease, as long as you wipe it with a paper towel before using it, there is no effect (but if you often use it to watch videos, the experience will definitely be worse than without paper-like film Some).
For people who are used to writing on paper and want to switch to writing on iPad at once, most people still need paper-like film, because it feels slippery if you don't get used to writing at first.
From this point of view, if you are accustomed to touch-screen operations and rarely need to write or draw with a pen, there is no need to paste paper-like films.
But for those who are not accustomed to touch screen operation, or write and draw on the iPad for a long time every day, it is still necessary to change a paper-like film.
When purchasing, pay attention to the fact that the quality of the paper-like films on the market is uneven. Choose the ones with good market reputation and guaranteed quality. Take the iPad paper film of the old brand of digital accessories, Green Union as an example, with anti-reflective coating on the surface. Layer to block harmful screen glare.
The thickness is only 0.15mm, the response is sensitive, the writing is not easy to break, and the painting can be more refined.
Ipad Handwriting Matte Film,Ipad Rainproof Film Flexible Screen Protector,Ipad Write Draw Screen Laminate,Tablet Pet Magnetic Screen Protection
Shenzhen Customized Technology Co., Ltd. , https://www.protectionfilm6.com