On Sun, 2022-12-18 at 17:44 -0500, Bill Cunningham wrote:
OK so how exactly do I create an "empty" ISO file? I will try to explain by example.
As above say I have an "empty" vfat format.
mount /dev/loop /mnt which is attached to a FILE.
copy files manually into the /mnt directory. Be they VOBs IFOs or such.
wold I have to turn to mkfs.udf for this? IDK if that is a ISO.
To create a playable DVD, the files have to be put into the master image (the ISO file, in your example), in order. DVD players are very simple, and expect the first file at the start of the disc, and the rest in sequence. They can do a bit of hunting around to play different files, but each file is contiguous in itself. There's also a bootblock kind of structure to the disc, with headers identifying the type of disc.
These are just a few reasons why you use video-DVD creation tools to create DVDs, rather than try to do it all by hand.