1, the problem of projector projection should be considered. This resolution can be found on the corresponding official website according to the projector model. Determine the actual output file ratio (such as 4: 3 or 16: 9) and resolution (such as 1280*720, 720*576, 1920* 1080) according to the resolution supported by the projector.

2. The problem of computer players should be considered. Try to install a player with complete decoders (such as QQ video, perfect decoding, etc.). ). At the same time, in order to present better effect, it is suggested to select MP4 (HD) or MPG (SD) encoded output file of h.264.

3. Consider the problem of computer configuration. If the computer configuration is high and the hard disk speed is higher, it is recommended to use files with large bit rate. Because the bigger the code rate, the better the video effect will be. It is generally recommended that the standard definition code rate should not be higher than 6-8M, and the high definition code rate should not exceed 20M.