mjhjmtu

I'm newbie and trying to use aria2 as my downloader in android device using termux, so I create this bash script for easy write (I don't know too much).

#!/system/bin/sh
download() aria2c $link 
 --dir=/sdcard/Download/ 
 --force-sequential=true 
 --file-allocation=none 
 --continue=true 
 --max-concurrent-downloads=16 
 --min-split-size=20M 
 --max-connection-per-server=16 
 --split=16


loop()
 echo "Do you wish to download more new files? [1 or 2]" 
 select yn in "Yes" "No"; do 
 case $yn in 
 Yes ) download; loop; 
 break;; 
 No ) echo "Exiting...!";
 exit;;
 esac 
 done


download
loop

Then the thing is I noticed that depends on file size min split size give different result, when its like 5-100MB file, min split size 1MB gives optimum result for me and for 400+MB file, min split size 20MB gives optimum result while 100-400MB, min split size 5 or 10MB gives optimum result. So is there a way to dynamically change it with bash or maybe other way?

PS:If there is a way to do that, can I implement it to youtube-dl (or any others that can use external downloader) using aria2 as it downloader?