<s>
The	O
Panasonic	B-Device
Lumix	I-Device
DMC-GH4	I-Device
is	O
a	O
Micro	B-Operating_System
Four	I-Operating_System
Thirds	I-Operating_System
System	I-Operating_System
digital	O
still	O
and	O
video	O
camera	O
originally	O
released	O
in	O
May	O
2014	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
its	O
release	O
,	O
the	O
GH4	O
was	O
notable	O
for	O
being	O
the	O
world	O
's	O
first	O
Mirrorless	B-Device
interchangeable-lens	I-Device
camera	I-Device
with	O
4K	B-Architecture
Video	I-Architecture
recording	O
capability	O
.	O
</s>
<s>
The	O
GH4	O
is	O
largely	O
physically	O
similar	O
to	O
its	O
predecessor	O
,	O
the	O
Panasonic	B-Device
Lumix	I-Device
DMC-GH3	I-Device
,	O
adding	O
only	O
a	O
locking	O
mode	O
dial	O
and	O
more	O
detailed	O
rear	O
LCD	B-Device
screen	I-Device
and	O
Electronic	O
Viewfinder	O
.	O
</s>
<s>
The	O
emphasis	O
of	O
the	O
camera	O
is	O
the	O
video	O
with	O
Venus	B-Application
Engine	I-Application
IX	O
processor	O
allow	O
for	O
4K	B-Architecture
video	I-Architecture
and	O
12	O
fps	O
continuous	O
shooting	O
.	O
</s>
<s>
As	O
a	O
4K	B-Architecture
video	I-Architecture
camera	O
,	O
it	O
can	O
be	O
categorized	O
as	O
a	O
pro-level	O
video	O
camera	O
that	O
can	O
record	O
in	O
Cinema	O
4K	B-Architecture
mode	O
(	O
4096	B-Architecture
x	I-Architecture
2160	I-Architecture
)	O
or	O
standard	O
4K-UHD	O
(	O
3840	O
x	O
2160	O
)	O
using	O
IPB	O
compression	O
in	O
100Mbit/s	O
.	O
</s>
<s>
The	O
camera	O
also	O
provides	O
.mov	B-Application
,	O
mp4	O
,	O
AVCHD	O
Progressive	O
,	O
and	O
AVCHD	O
video	B-Application
formats	I-Application
at	O
a	O
variety	O
of	O
frame	O
rates	O
according	O
to	O
the	O
usage	O
;	O
and	O
options	O
for	O
VFR	B-General_Concept
(	O
Variable	B-General_Concept
Frame	I-General_Concept
Rate	I-General_Concept
)	O
or	O
Time	O
Lapse/Stop	O
Motion	O
Animation	O
without	O
the	O
need	O
for	O
post-production	O
processing	O
.	O
</s>
<s>
Video	O
features	O
added	O
to	O
the	O
DMC-GH4	B-Device
include	O
Focus	B-Algorithm
peaking	I-Algorithm
,	O
zebra	O
overlay	O
,	O
luminance	O
level	O
adjustment	O
,	O
and	O
cinema	O
gamma	O
presets	O
.	O
</s>
<s>
The	O
YAGH	O
connects	O
to	O
the	O
GH4	O
via	O
attachment	O
screw	O
on	O
the	O
bottom	O
of	O
the	O
camera	O
,	O
as	O
well	O
as	O
a	O
sliding	O
mechanism	O
which	O
plugs	O
into	O
the	O
camera	O
's	O
HDMI	B-Protocol
port	O
on	O
the	O
side	O
.	O
</s>
<s>
The	O
interface	O
contains	O
two	O
3-pin	O
XLR	B-Device
Connector	I-Device
inputs	O
,	O
which	O
are	O
controlled	O
by	O
a	O
pair	O
of	O
preamplifiers	O
inside	O
the	O
unit	O
,	O
offering	O
phantom	B-Algorithm
power	I-Algorithm
,	O
more	O
control	O
over	O
input	O
gain	O
levels	O
and	O
microphone	O
choice	O
,	O
and	O
input	O
metering	O
via	O
LED	O
meters	O
on	O
the	O
interface	O
.	O
</s>
<s>
For	O
outputs	O
,	O
the	O
YAGH	O
offers	O
four	O
BNC	B-Protocol
connector	I-Protocol
terminals	O
for	O
Serial	B-Protocol
Digital	I-Protocol
Interface	I-Protocol
use	O
with	O
outboard	O
recorders	O
and	O
monitors	O
.	O
</s>
<s>
In	O
addition	O
,	O
a	O
full-size	O
HDMI	B-Protocol
port	O
is	O
also	O
present	O
.	O
</s>
