Picture: EOSHD Forum, by Orangenz
Panasonic have confirmed that the GH4 (quite amazingly) outputs 10bit 4K 4:2:2 from the onboard micro HDMI port without the YAGH external HD-SDI unit.
However there are still benefits to using the HD-SDI outputs.
Here I have more details on how this whole thing works and what external recorders might be in the pipeline to offer 4K recording on the GH4…
Read moreMore information on 10bit 4K 4:2:2 via micro HDMI on the GH4 without external box