里面可以详查相关信息，比如 HDMI支持 10/8 bit。。。。
http://www.43rumors.com/category/rumor/
这是正式的发布信息


Panasonic newly offers Interface Unit (DMW-YAGH) exclusively for professional/industrial workflow with DMC-GH4 that enables more powerful video transmission. It complies with Full HD (4:2:2 / 10-bit) four parallel outputs and these can be used for 4K (4:2:2 / 10-bit) output – both with time code*1. The XLR input terminals (2ch) are also equipped to connect line or condenser microphone. When connecting with microphone, volume can be controlled for L and R separately, which can be monitored LED audio level display on the back of the unit. The 12V DC IN is highly compliant with large-capacity industrial battery and continuously supplies the DMC-GH4 with power*2.
*1 Setting the HDMI output picture quality [4:2:2 / 10bit]
You can output the image through the HDMI connection in higher picture quality, but you cannot record it as a motion picture or still pictures. Ideal when the HDMI output is to be saved on external devices. When using 4:2:2/10-bit output, simultaneous video recording on SDXC/SDHC Memory Card in the camera is not possible.
*2 HDMI output from the camera is not possible when the camera is mounted on the Interface Unit.
•The “AVCHD” is a high definition (HD) digital video recording / playback format jointly established by Panasonic Corporation and Sony Corporation.
• “AVCHD Progressive”, “AVCHD”, the “AVCHD Progressive” Logo and the “AVCHD” Logo are trademarks of Panasonic Corporation and Sony Corporation.
•Android and Google Play are trademarks or registered trademarks of Google Inc.
• IOS is a trademark or registered trademark of Cisco in the U.S. and other countries and is used under license.
• HDMI, the HDMI Logo, and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries.
•All other company and product names are trademarks of their respective corporations.
•This unit is compatible with both SD/SDHC/SDXC Memory Cards. You can only use SDHC/SDXC Memory Cards on devices that are compatible with them. You cannot use SDHC/SDXC Memory Cards on devices that are only compatible with SD Memory Cards. (When using an SDHC/SDXC Memory Card on another device, be sure to read the operating instructions for that device.)
•SDHC Memory Cards and SDXC Memory Cards can be used only in equipment that is compatible with their respective formats.
• If the computer being used does not support SDXC Memory Cards, a message prompting you to format may appear. (Doing so will cause recorded images to be erased so do not choose to format.) If the card is not recognized, please refer to the below support site.
http://panasonic.net/avc/sdcard/information/SDXC.html[Open New Window]
•Some accessories are not available in some countries.
•The use of recorded or printed materials that are protected by copyright for any purpose other than personal enjoyment is prohibited, as it would infringe upon the rights of the copyright holder.
•Design and specifications are subject to change without notice.
Figure #1 Video Recording Format Matrix
MOV
59.94Hz
[4K] 3840×2160, 29.97p, 100Mbps(IPB), LPCM
[4K] 3840×2160, 23.98p, 100Mbps(IPB), LPCM
[FHD] 1920×1080, 59.94p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
[FHD] 1920×1080, 29.97p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
[FHD] 1920×1080, 23.98p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
50.0Hz
[4K] 3840×2160, 25.00p, 100Mbps(IPB), LPCM
[FHD] 1920×1080, 50.00p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
[FHD] 1920×1080, 25.00p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
24.0Hz
[C4K] 4096×2160, 24.00p, 100Mbps(IPB), LPCM
[4K] 3840×2160, 24.00p, 100Mbps(IPB), LPCM
[FHD] 1920×1080, 24.00p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
MP4
59.94Hz
[4K] 3840×2160, 29.97p, 100Mbps(IPB), LPCM/AAC
[4K] 3840×2160, 23.98p, 100Mbps(IPB), LPCM
[FHD] 1920×1080, 59.94p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
[FHD] 1920×1080, 29.97p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
[FHD] 1920×1080, 23.98p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
[FHD] 1920×1080, 59.94p, 28Mbps(IPB), AAC
[FHD] 1920×1080, 29.97p, 20Mbps(IPB), AAC
[HD] 1280×720, 29.97p, 10Mbps(IPB), AAC
[VGA] 640×480, 29.97p, 4Mbps(IPB), AAC
50.0Hz
[4K] 3840×2160, 25.00p, 100Mbps(IPB), LPCM/AAC
[FHD] 1920×1080, 50.00p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
[FHD] 1920×1080, 25.00p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
[FHD] 1920×1080, 50.00p, 28Mbps(IPB), AAC
[FHD] 1920×1080, 25.00p, 20Mbps(IPB), AAC
[HD] 1280×720, 25.00p, 10Mbps(IPB), AAC
[VGA] 640×480, 25.00p, 4Mbps(IPB), AAC
24.0Hz
[C4K] 4096×2160, 24.00p, 100Mbps(IPB), LPCM
[4K] 3840×2160, 24.00p, 100Mbps(IPB), LPCM
[FHD] 1920×1080, 24.00p, 200Mbps(ALL-Intra)/100Mbps(IPB)/50Mbps(IPB), LPCM
AVCHD Progressive
AVCHD
59.94Hz
[FHD] 1920×1080, 59.94p, 28Mbps(IPB), Dolby Digital
[FHD] 1920×1080, 59.94i, 24Mbps(IPB), Dolby Digital (sensor output: 29.97fps)
[FHD] 1920×1080, 59.94i, 17Mbps(IPB), Dolby Digital (sensor output: 59.94fps)
[FHD] 1920×1080, 23.98p, 24Mbps(IPB), Dolby Digital
50.0Hz
[FHD] 1920×1080, 50.00p, 28Mbps(IPB), Dolby Digital
[FHD] 1920×1080, 50.00i, 24Mbps(IPB), Dolby Digital (sensor output: 25.00fps)
[FHD] 1920×1080, 50.00i, 17Mbps(IPB), Dolby Digital (sensor output: 50.00fps)
Figure #2 VFR (Variable Frame Rate) Matrix
59.94Hz
MOV/FHD/100Mbps/29.97p, MP4(LPCM)/FHD/100Mbps/29.97p:
2fps, 15fps, 26fps, 28fps, 30fps, 32fps, 34fps, 45fps, 60fps, 75fps, 90fps, 96fps
MOV/FHD/100Mbps/23.98p, MP4(LPCM)/FHD/100Mbps/23.98p:
2fps, 12fps, 20fps, 22fps, 24fps, 26fps, 28fps, 36fps, 48fps, 60fps, 72fps, 84fps, 96fps
AVCHD/FHD/24Mbps/29.97p:
2fps, 15fps, 26fps, 28fps, 30fps, 32fps, 34fps, 45fps, 60fps
AVCHD/FHD/24Mbps/23.98p:
2fps, 12fps, 20fps, 22fps, 24fps, 26fps, 28fps, 36fps, 48fps, 60fps
50.00Hz
MOV/FHD/100Mbps/25.00p, MP4(LPCM)/FHD/100Mbps/25.00p:
2fps, 12fps, 21fps, 23fps, 25fps, 27fps, 30fps, 37fps, 50fps, 62fps, 75fps, 96fps
AVCHD/FHD/24Mbps/25.00p:
2fps, 12fps, 21fps, 23fps, 25fps, 27fps, 30fps, 37fps, 50fps
24.00Hz
MOV/FHD/100Mbps/24.00p, MP4(LPCM)/FHD/100Mbps/24.00p:
2fps, 12fps, 20fps, 22fps, 24fps, 26fps, 28fps, 36fps, 48fps, 60fps, 72fps, 84fps, 96fps