I’d like to recommend using DVDFab for converting your ISO files to MP4 format. It's available on Linux, including your Manjaro setup. If you encounter any issues with encrypted DVDs, you might also need to consider tools like MakeMKV for decryption. Just keep in mind that MakeMKV is typically used to extract the video without compression, so you can then use DVDFab HD Decrypter afterward to convert to MP4 if needed.
I’d like to recommend using DVDFab for converting your ISO files to MP4 format. It's available on Linux, including your Manjaro setup. If you encounter any issues with encrypted DVDs, you might also need to consider tools like MakeMKV for decryption. Just keep in mind that MakeMKV is typically used to extract the video without compression, so you can then use DVDFab HD Decrypter afterward to convert to MP4 if needed.