I have done quite a bit of searching, but have not found a sure-fire answer. Is it known what the transfer write speeds of the HDMI interface from the 5D3 and 5D2 are? Do they surpass the CF write speed of 163/MBs?
If there could be a possibility of spitting raw data through HDMI, I already have a team of very skilled engineers I am financing to research an HDMI interface, as well as a CF-to-SATA interface with a minimum transfer rate of 500mb/s (for future cameras).
I would really like to have an official HDMI investigation started, but I am only a designer and investor, and have zero skills in development.
already tried, but we can not transfer custom data via HDMI without it being modified by hardware.
Is the live-view preview downsampled? 1.2.1 was a software update that increased the HDMI capabilities--my feeble mind just assumed that the same methodology could be applied to the output of the live-view feed in conjunction with the raw information.
the hdmi-port (v1.3) as is - is able to transport around 8GBit, so ~1GByte/second. but:
(A) the hdmiport in the body is hardwired somewhere after the digic and somekind of data-to-tv-logic.
(B) the hdmi output is logically somewhere after the jpg-process
(C) its hardly nonsense to rewire the inbuilt hdmiport, sending data over it and then hoping, on the receive-side is any equipment understanding these data (and able to handle the datarate) - you have to build it as well.
(D) receiver - i guarantee its no fieldrecorder, but a raidbased datastorage..
(so far my assumings)
by now i m more interested how to lower the amount of data without losing its benefits. for example 10bit logarithmic. so, gently saying, forget this idea.
regards chmee
Hey chmee and others (nice CineDNG-Converter work by the way, i was also totally braindead after trying to sort these little/big endian shifts out -for some personal tests, tell you later).
Here are some personal findings to the theme:
As far as the community knows this HDMI Chip (or a very similar) seems to be build in:
http://www.analog.com/en/audiovideo-products/analoghdmidvi-interfaces/adv7523a/products/product.html
As far as we can see that means, that the canons seem to be limited to HDMI-1080i-Output, and the Chip can manage to process the Data with 80MHz. So we could assume, that the max possible data-throughput via HDMI is about 80 Mhz x 16 Bit data, which could mean max 80 Mio 16 Bit values. As the Raw Data from the sensor is 14 Bit/BayerPixel we could assume, that we could transfer about 80 Mio RAW Pixels per HDMI after hiding them in normal HDMI-data some way. 1920x1080@24fps with 16 Bit/RAW-pixel would mean about 50 Mio RAW-pixels. So there seems no hope for much higher resolutions.
The Magic Lantern Team can write the RAW-pixels to the HDMI-Chip, but the output will be modified to and HDMI-compliant output in hardware, like 16.235 conversion, sharpening color space conversion etc. But it could be possible to switch off some of these features in the HDMI-Chip. But still there will be probably coming modified data out the HDMI port.
Greetings
Rudi (from slashCAM)
I like your optimism, Rudi! My engineer and I are SO close to having a working CF-to-SSD solution--but that still only offers us a max of 160+/- output from the 5D3.
After we're done with the CFSSD interface, we are still going to work on adding a HDMI input to that same interface to act as a data recorder. I only hope that there is a HDMI development to follow suit!