Convert .MPG to .ISO video file

I created a 1 hour 25 minute video and it's saved as .MPG. I am publishing the video through [login to view URL] and they have a requirement that the video format be in .ISO to upload to their site. I tried to convert this through Movavi v12 software but the resulting quality was VERY poor. I need you to convert my 53GB movie .MPG file to .ISO and ensure that it meets 100% of the requirements on [login to view URL]'s DVD requirements page [login to view URL] -Content must be an authored DVD provided as a single ISO file. -ISO files must be unencrypted. -Your source must contain only AUDIO_TS and VIDEO_TS folders in the root directory of the disc. -We do not support inclusion of data or executable files on DVD. -In order to maximize playback compatibility, we recommend a maximum total bit rate for the combined video and audio tracks of 6.5 Mbp/s (megabits per second). -We recommend using Dolby Digital (AC-3) audio; however PCM and DTS audio are also supported. -We accept files up to 4.6 GB in size. -Only single track DVDs are supported at this time. I will need to get you my 53GB file somehow (dropbox, file share, not email- the file is too big for email) I will need to receive back from you a .ISO video file that I can upload to [login to view URL] Please tell me what program you will use for the conversion. Please message me with questions. Thank you Jared Kelner