What exactly is MP4? Just as people refer to MP3 players as MP3s, MP4 portable video players are also referred to as MP4s. Of course, just as MP3 is not MPEG3, MP4 is not MPEG4. The names they use have no direct relationship with their underlying technology applications. The concept of MP4 has actually been extended by manufacturers. mp4 is a file format, and mpeg4 is an encoding standard, the two are not a concept in the sense. As you can understand, mp4 is a standard audio and video file that supports mpeg4, and there are many file formats that support the mpeg4 standard, mp4 and avi are one of them. You should be able to find a lot of software on the Internet to convert between mp4, wmv, mpg, avi, rbmv and other video files. The concept of MP4 is nothing more than two concepts. One refers to the music format after MP3. From a technical perspective, MP4 uses MPEG-2 AAC technology, also known as A2B or AAC technology. It is characterized by better sound quality and greater compression ratio (15: 1-20: 1). It adds features such as perfect reproduction of stereo, bitstream effect sound scanning, multimedia control, noise reduction, etc. that MP3 does not, so that the audio quality of CD can still be perfectly reproduced after audio compression. The other refers to a portable player that supports the MPEG-4 video format. Let's first take a look at what is MP4. MP4 (also called MPEG-4) is a type of MPEG format and a compression method for moving images. Through this compression, you can use smaller files to provide higher image quality, is one of the most popular (especially in the network) video file format. The advantage of this format is that it can not only cover the low frequency band, but also develop to the high frequency band. MP4 has attracted wide attention since the day it was proposed. Currently, the most popular compression methods used by MP4 are DivX and XviD. After the DVD program processed by MP4 technology represented by DivX or XviD, the video and audio quality of the image does not drop much, but the volume is reduced to a fraction of the original, you can easily use two ordinary CDs with a capacity of 650MB -ROM to save the generated files. One film can hold a movie for 100 minutes, and the picture quality at this time is significantly better than VCD. MP4, it ’s just a compression standard, just like VCD is based on MP2, MP3 seems to only compress audio, MP4 audio and video can be compressed, usually on the computer What kind of plug-ins (DIVX, FFDSHOW) and so on are needed to watch movies, It is compressed with MP4. Most MP4s nowadays tend to be multimedia players that can play AAC, which can be said to be rare. Some media even described MP4 as an abbreviation for MPEG4, which used to be a fallacy, but after repeated hype by merchants, this fallacy became truth. Now if you go to the computer city and hear the word MP4, it is definitely the concept of a multimedia player that can play video formats, not a Walkman that can play audio MP4 AAC. This strange phenomenon is not without reason. As mentioned above, AAC has a copyright protection function. This is also the reason why many record companies support AAC. To make your player support AAC, you must also support paying a certain copyright fee or patent. Fees, in addition, the source of AAC is also a problem. Unlike MP3, it has very few online sources, so the current development of audio MP4 players is not yet mature. In terms of abbreviations, this also coincides with the rule that MP4 is the next generation of MP3. In addition to supporting the music playback function of MP3, it also has powerful MPEG-4 video playback capabilities. In addition, it happens that "4" is in "3" "From this point of view, it is reasonable to equate MP4 with MPEG-4 　 The difference between the two is that MPEG4 is a series of encoded names, while MP4 is the file name suffix. MP4 is a packaging format that includes different combinations of video encoding and audio encoding. Therefore, there is a compatibility problem. If an MP4 file cannot be played on your playback device, you can use the format factory for format conversion, select compatible video encoding, screen size (resolution), bit rate (code rate), conversion After that, you can usually play it. Digital Air Fryer,Best Digital Air Fryer,Digital Oil Less Fryer,Electric Digital Air Fryer Ningbo ATAP Electric Appliance Co.,Ltd , https://www.atap-airfryer.com
