Download and install the second compression master control software and open the software interface.

Click the "Picture Compression" or "Video Compression" button and select the file to be compressed.

In the pop-up window, you can select the compression method, such as compression ratio and compression quality.

Click the "Start Compression" button and wait for the compression to complete.

After the compression is completed, you can view the compressed file size and compression ratio in the software, or you can find the compressed file in the directory where the original file is located.

Precautions:

Appropriate compression methods and parameters should be selected according to the actual situation to avoid the situation that the quality of compressed files is insufficient or the file volume is still large.

The compression process may take a long time, so you can perform other operations during the compression process or wait until the compression is completed.