<s>
QuickTime	B-Application
File	I-Application
Format	I-Application
(	O
QTFF	B-Application
)	O
is	O
a	O
computer	O
file	O
format	O
used	O
natively	O
by	O
the	O
QuickTime	B-Application
framework	O
.	O
</s>
<s>
The	O
ability	O
to	O
contain	O
abstract	O
data	O
references	O
for	O
the	O
media	O
data	O
,	O
and	O
the	O
separation	O
of	O
the	O
media	O
data	O
from	O
the	O
media	O
offsets	O
and	O
the	O
track	O
edit	O
lists	O
means	O
that	O
QuickTime	B-Application
is	O
particularly	O
suited	O
for	O
editing	O
,	O
as	O
it	O
is	O
capable	O
of	O
importing	O
and	O
editing	O
in	O
place	O
(	O
without	O
data	O
copying	O
)	O
.	O
</s>
<s>
Other	O
later-developed	O
media	O
container	O
formats	O
such	O
as	O
Microsoft	O
's	O
Advanced	B-Application
Systems	I-Application
Format	I-Application
or	O
the	O
Matroska	O
and	O
Ogg	O
containers	O
lack	O
this	O
abstraction	O
,	O
and	O
require	O
all	O
media	O
data	O
to	O
be	O
rewritten	O
after	O
editing	O
.	O
</s>
<s>
Because	O
both	O
the	O
QuickTime	B-Application
and	O
MP4	O
container	O
formats	O
can	O
use	O
the	O
same	O
MPEG-4	B-Algorithm
formats	O
,	O
they	O
are	O
mostly	O
interchangeable	O
in	O
a	O
QuickTime-only	O
environment	O
.	O
</s>
<s>
This	O
is	O
especially	O
true	O
on	O
hardware	O
devices	O
,	O
such	O
as	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
and	O
various	O
DVD	O
players	O
;	O
on	O
the	O
software	O
side	O
,	O
most	O
DirectShow	B-Library
and	O
Video	B-Device
for	I-Device
Windows	I-Device
codec	O
packs	O
include	O
an	O
MP4	O
parser	O
,	O
but	O
not	O
one	O
for	O
QTFF	B-Application
.	O
</s>
<s>
In	O
QuickTime	B-Application
Pro	O
's	O
MPEG-4	B-Algorithm
Export	O
dialog	O
,	O
an	O
option	O
called	O
"	O
Passthrough	O
"	O
allows	O
a	O
clean	O
export	O
to	O
MP4	O
without	O
affecting	O
the	O
audio	O
or	O
video	O
streams	O
.	O
</s>
<s>
One	O
discrepancy	O
ushered	O
in	O
by	O
QuickTime	B-Application
7	I-Application
released	O
on	O
April	O
29	O
,	O
2005	O
,	O
is	O
that	O
the	O
QuickTime	B-Application
file	I-Application
format	I-Application
supports	O
multichannel	O
audio	O
(	O
used	O
,	O
for	O
example	O
,	O
in	O
the	O
high-definition	O
trailers	O
on	O
Apple	O
's	O
site	O
)	O
.	O
</s>
<s>
The	O
International	O
Organization	O
for	O
Standardization	O
approved	O
the	O
QuickTime	B-Application
file	I-Application
format	I-Application
as	O
the	O
basis	O
of	O
the	O
MPEG-4	B-Algorithm
file	O
format	O
.	O
</s>
<s>
The	O
MPEG-4	B-Algorithm
file	O
format	O
specification	O
was	O
created	O
on	O
the	O
basis	O
of	O
the	O
QuickTime	B-Application
format	O
specification	O
published	O
in	O
2001	O
.	O
</s>
<s>
The	O
MP4	O
(	O
)	O
file	O
format	O
was	O
published	O
in	O
2001	O
as	O
the	O
revision	O
of	O
the	O
MPEG-4	B-Algorithm
Part	I-Algorithm
1	I-Algorithm
:	O
Systems	O
specification	O
published	O
in	O
1999	O
(	O
ISO/IEC	O
14496-1:2001	O
)	O
.	O
</s>
<s>
In	O
2003	O
,	O
the	O
first	O
version	O
of	O
MP4	O
format	O
was	O
revised	O
and	O
replaced	O
by	O
MPEG-4	B-Algorithm
Part	O
14	O
:	O
MP4	O
file	O
format	O
(	O
ISO/IEC	O
14496-14:2003	O
)	O
.	O
</s>
<s>
This	O
registration	O
authority	O
for	O
code-points	O
in	O
"	O
MP4	O
Family	O
"	O
files	O
is	O
Apple	O
Inc	O
.	O
and	O
it	O
is	O
named	O
in	O
Annex	O
D	O
(	O
informative	O
)	O
in	O
MPEG-4	B-Algorithm
Part	O
12	O
.	O
</s>
