Quicktime MOV, MP4 or AVCHD
reduced rolling shutter
capable of real-time image output on the external monitor via an optional HDMI micro cable simultaneously while recording video
SMPTE time code / EBU / ARIB Color bars & 1KHz Test Tone
LPCM sound recording (or option of AAC in QFHD 4K MP4 mode)
full manual audio control
3.5mm stereo mic input
Center Marker
Synchro scan to suppress flicker
Cinelike Gamma
Master Pedestal - used to lighten or darken shadow areas of the image based on black levels
Zebra pattern - to watch white wash-out
Focus peaking
PAL / NTSC switchable
time-lapse or stop motion animation in electronic shutter mode
articulated screen
when recording the video in MOV, AVCHD Progressive, AVCHD or MP4(LPCM), the GH4 automatically generates multiple seamless files for continuous recording
unlimited video length except 29 minutes 59 seconds on the European GH4 due to tax reasons
can choose which broadcast safe RGB luma range to use (0-255, 16-235 for the safe range, or 16-255)
new SD cards which can sustain up to 30Mb/s as a bare minimum - apparently good enough for 240Mbit/s 1080p
optional external XLR / HD-SDI add-on (DMW-YAGHE) allows for:
uncompressed debayered 10bit 4K output over 3G HD-SDI which can be saved on an external recorder
sound inputs via XLR mics with audio level controls for each channel
12V power
two screw threads on the front to add rails and support for PL mount lenses.