M2TS is a video file format that contains Blu-ray BDAV high-definition HD video. This is video from Blu-ray discs and digital camcorders. The .m2ts extension means “MPEG-2 Transport Stream”. However, it is associated as the narrower container format BDAV, which is the standard Blu-ray format for consumer video discs. The original name for the file type is Blu-ray BDAV Video File. The format was developed by Sony. It arose after the introduction of new Blu-ray media. The audio and video transmission protocol M2TS, i.e., MPEG-2 Transport Stream, was created based on MPEG-2. In fact, this is his advanced modification. The protocol supports error correction if partial data loss occurs. A .m2ts file is a BDAV container that contains digital multimedia data that is compressed by one of the videos available in the H.262, H.264, VC-1 format. And some audio codecs, too. This is Dolby AC3, PCM. There are several video and audio streams in one M2TS file. There are also subtitle tracks that can be selected during playback. Most modern video players support .M2TS format. For smooth playback, you need a powerful computer. Such a video can be edited using the professional program Sony Vegas Pro.
3G2 is an audio / video format that was developed using the 3rd Generation Partnership Project 2 (3GPP2). The file extension is an improved version of the 3GP format. Today it is already outdated, despite the fact that it was previously updated. As a result of the implementation of the 3rd Generation Partnership Project, standards were developed that relate to methods of transmitting a wide variety of media data. For example, on mobile networks. The development of such standards, in particular, has led to the introduction of the 3G2 format and to the use of various types of media data on the global network for online streaming. This type of file is most often used on mobile phones, as well as on phones that support 3G. 3G2 video files can also be played on many computers. We emphasize that in this case there may be a need for additional applications. The 3G2 format is very similar to the MPEG-4 Part 14 series (MP4) format. However, in comparison with it, the 3G2 format is not so complicated. When you apply this type of file, you need to consider the possibility of reducing the requirements for the width of both the information transfer channel and disk space. So, the format for mobile phones is exactly what you need. 3G2 files have been specifically developed for phones operating in the CDMA standard.