How to execute command line and scheduled for batch converting images

When you save session

save session

Click "Save & Make Batch File"

make batch file

Click "OK", you'll get batch file created, and you can run it in command line, like this:

C:
cd "C:\Users\pan\AppData\Local\Programs\BatchImageConverter"
BatchImageConverter task="C:\Users\pan\Documents\resize_jpg.cit" logfile="C:\Users\pan\Documents\resize_jpg.log"

Or click "Create & Schedule Task" (this only for Windows now, Linux/macOS can use Crontab), you can run this batch file at a specific time and/or at a certain time every day. See this for detail: Schedule Task.