1. The player of the computer does not decode the file format recorded by the mobile phone, and needs to update a plug-in or change a special playing tool.
2. Play video on your mobile phone. If the player supports hardware acceleration of graphics card, it will be decoded by GPU. For example, the better ones are mxplayer, bsplayer and diceplayer.
3. The decoder used by the player is usually a patented decoder, all players are the same, and the copyright belongs to the encoder manufacturer.