yes of course(register) but a safer and more flexible way is the capacity to identified files also by the file header.
(maybe as an switch-option to save resources)
A Header is always a Header... file extensions can lie.
And not all aac that you simply rename in an mp4 extension play after that.
Another bad example is mts m2ts container
If i want to load these inside REAPER, i first have to repack the streams inside these containers in an mkv container.
(Ok i have to admit that i always do that because the Overhead is much lower etc.pp)
But the raw streams inside these containers remains the same as before.
Only after that(no matter which way i load vdeos) i can load this with REAPER. That´s a little bit..st...
So better also the possibility to identified by header.
Alot- hmmm better other Apps can do identified by header.
Only as an little example because i must/have to call that
is the simple but brilliant XMPlay...
Option -Verify file content
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Simply rename an mts/m2ts to mkv like in that posting you reference, nofish, is a very very bad idea!!!
Both are two complete different container formats!
Better extract the streams and move the same streams of course without re-encoding in an mkv container.
With the right App, this need only a few seconds.
As i said before the overheat(block size of the mkv container)is much lower.
So on top of that you save additional space- with the same content.