Generally speaking, the on-board mv is in mp4 format, that is, the suffix of the file name after downloading is ".mp4". Usually, you can also play MV video in "3gp" format, depending on whether the device specifically supports it. If the car multimedia is Android, you can watch or cache it online by installing a music platform directly on the Internet.

Basically, all major music platforms can download mv, and Netease Cloud, QQ Music, Cool Dog Music and Cool Me Music can download mv. You can also search "HD MV" directly through the browser to find content, find your favorite content and download it.

The MP4 file format is also called MPEG-4Part 14, which comes from MPEG-4 standard part 14. It is a multimedia format container, which is widely used to encapsulate video and audio data streams, posters, subtitles and metadata. (By the way, the popular video coding format AVC/H264 is defined in MPEG-4Part 10). MP4 file format is based on Apple's QuickTime format, so QuickTimeFileFormatSpecification can also be used as an important reference for our research on MP4.

general survey

MP4 file consists of boxes, and each box is divided into header and data. Among them, the header contains the type and size of the box, the data contains sub-boxes or data, and the box can nest sub-boxes.

Computer method: Use "Vidmore" to convert the video into mp4 format.

This is a special computer software for converting video formats, which supports batch conversion of video formats, with fast conversion speed and simple operation. Next, I will demonstrate the use of this software.

The specific operation steps are as follows

Step 1: Download and open the software on the computer, find the "+"icon on the homepage of the software, and click Upload to convert the video.

Step 2: After uploading the video, we find the _ icon next to the "Convert All" box in the upper right corner, click the drop-down box to find the mp4 format, and finally click the "Convert All" button to convert the video.