The website Photography Blog has published a 14 second sample move shot with the Panasonic GH3 in 72Mbps in ALL-I.

http://www.photographyblog.com/previews/panasonic_gh3_photos/

I have attached a screen shot taken from the movie. Unfortunately I am disappointed with the quality of the movie which I find inferior regarding sharpness and compression artefacts to driftwood's ALL-I hacks for the Panasonic GH2. Hopefully the 50Mbps IPB mode is better.

Below is the specifications of the movie.

MediaInfo Mac 0.7.36.0 file analysis report.

Report for file: panasonic_gh3_01.mov

Video Stream #1

Codec (Human Name)................................AVC

Codec (FourCC)....................................avc1

Codec Profile.....................................High@L5.0

Frame Width.......................................1 920 pixels

Frame Height......................................1 080 pixels

Frame Rate........................................25.000 fps

Total Frames......................................360

Display Aspect Ratio..............................16:9

Scan Type.........................................Progressive

Color Space.......................................YUV

Codec Settings (Summary)..........................2 Ref Frames

QF (like Gordian Knot)............................1.362

Codec Settings (CABAC)............................No

Codec Settings (Reference Frames).................2

Video Stream Length...............................14s 400ms

Video Stream BitRate..............................70.6 Mbps

Video Stream BitRate Mode.........................VBR

Bit Depth.........................................8 bits

Video Stream Size.................................121 MiB (98%)

Date of Original Encoding.........................UTC 2012-10-08 13:59:21

Color Primaries...................................BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177

Transfer Characteristics..........................BT.709-5, BT.1361

Matrix Coefficients...............................BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

Audio Stream #1

Codec.............................................PCM

Codec (FourCC)....................................twos

Audio Stream Length...............................14s 400ms

Audio Stream BitRate..............................1 536 Kbps

Audio Stream BitRate Mode.........................CBR

Number of Audio Channels..........................2

Sampling Rate.....................................48.0 KHz

Bit Depth.........................................16 bits

Audio Stream Size.................................2.64 MiB (2%)

Date of Original Encoding.........................UTC 2012-10-08 13:59:21