Frederik_Bo said:
Quote from: Frederik_Bo on Today at 02:11:44 PM
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Quote from: Frederik_Bo on Today at 01:36:02 PM
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new 4K codecs,etc .. most of that has to be done in hardware and not software.
How so? Codecs are a softwere property. I am sure the processor can handle it.
the reason they do mjpeg is the low cpu cost. they can't dissipate heat fast enough to do h.264 in camera, so they stuck with mjpeg.
I find that har to believe. Especially as it is not reading the hole sensor in 4k mode.
Further more they have been doing h264 in camera for HD for years. It would seem odd if they can't do it with 4k By now.
being able to efficiently (in a power and heat sense) process 1080P is in no way an indication of being able to do so for four times that amount of data. You can believe what you like, but Canon only touts stills extraction and the ridiculous video bitrate as a "feature" because they have to make the best of the situation they are stuck in with mjpeg. If they could do 4K with a better codec in camera, they would be doing it already, at least with the 1DC or the 1DX2, and they aren't.
Well the 5d mark II did it with Full HD in 2009. The mark IV came out in 2016. That gives it 7 years on the Mark II which amounts to 84 months. Moores law says that processing power dubles every 18 months. This would make the current 5d mark IV be 4,6 doublings a head of the mark II. This gives us an exponential funktion looking like this: 2x1^4,6=24,25. Meaning that if the processors in the canon cameras, have been keeping up with Moores law, then the processor in the 5d mark IV should be roughly 24,25 times as fast as the the mark II. I think the processing of 4 times the amount of data should be possible. No way is processing power the bottleneck.
moore's law has been dead for years.
not to mention, again, these aren't done in DIGIC, they are using DSP's to output the video stream. in the camera DIGIC's those are limited to 1080p.
the 4K is grabbed because instead of going through the DSP, they are reading the sensor 30/60,etc times a second and saving a JPG from the "window". that can be done without going through the DSP's.
it's also why the 4K implementation doesn't output HDMI, and why no h.264, etc .. because the DSP hardware wasn't available when the 5D Mark IV (or 1DX Mark II) were being R&D'ed.
they could have put a DIGIC DV in there (and limit camera functions - see XC10), which would handle the 4k DSP, but then that would have required active cooling because both the XC10, C300,C500,etc require heatsinks and fans to cool off the DIGIC processor for processing 4K.
So yeah. just software. that easy.
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here's the XC15 and C300 .. notice anything that couldn't be done on a semi sealed DSLR?
people have the tin foil hats on too tightly, when canon can't even pull off 4K without heat venting on video cameras.
