Author Topic: Canon 70D  (Read 499866 times)

DigitalVeil

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Re: Canon 70D
« Reply #400 on: January 03, 2015, 01:02:37 AM »
Sorry DV I updated my post on the usb 3.0, as it appears it was prior to official release.  However once released it did not materialize.

Yeah with the 7D2 they specifically make a point to say it's 3.0.  If they didn't with the 70D, I'm sure it's 2.0.

I do know that the 70D inherited the 90 MB/s All-I compression from the 5D MarkIII, so its got to have superior throughput processing somewhere? that can be tapped.


All-I plus 3.0x CBR should be at least bit of a step up.  I wonder if the h264 encoder will actually be able to handle ~35MB/s without stopping.  Does anyone know if that works on the 5D3?
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TomJ

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Re: Canon 70D
« Reply #401 on: January 03, 2015, 05:38:52 PM »
Quote
If i remember correctly,  With a 64GB 95MB/s Sandisk card,  i was able to shoot over a minute at 1600x600 and roughly 45-55 seconds at 1792xXXX with 2:35:1 aspect ratio.  I went from a 45MB/s card and was told on this forum it would not be much of a difference but it was.  it doubled my recording time.  So the Card you put into the camera does matter.  Lets just hope the Dual AF works well with RAW video.

You got that with RAW? The 70D should be the same as the 6D (meaning write, not meaning sensor of course, seems to me, the 70D should be faster for data, given the crop?)

nikfreak

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Re: Canon 70D
« Reply #402 on: January 03, 2015, 09:30:48 PM »
nahhh not really. I owned 6D and now after my first raw tests on 70D both are same regarding raw write speeds / resolutions.
70D.112 & 100D.101

gsanchez922

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Re: Canon 70D
« Reply #403 on: January 03, 2015, 09:41:23 PM »
Hey ShootMeAlready, sorry man but you are wrong
1 The CPU is not the 6, is the 5+
2 AF point is 19 .

I have a question the problem with the writing speed is for the camera or memory? if the answer is memory, we can get a memory with 95/MBs to 280/MBs and the problem gonna be solved...

walter_schulz

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Re: Canon 70D
« Reply #404 on: January 03, 2015, 09:53:02 PM »
280 MByte/s requires UHS-II and no camera supported by ML has this interface. When used in UHS-I mode Sandisk's UHS-II card will be good for about 45 MByte/s.
And Canon's SD-card interface is limited to about 41 MByte/s on 6D, 70D, 650D, 700D. On all other cams running SD (excluded 7DII) the interface is good for about half that rate.

DigitalVeil

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Re: Canon 70D
« Reply #405 on: January 04, 2015, 04:01:38 AM »
Hey ShootMeAlready, sorry man but you are wrong
1 The CPU is not the 6, is the 5+
2 AF point is 19 .

I have a question the problem with the writing speed is for the camera or memory? if the answer is memory, we can get a memory with 95/MBs to 280/MBs and the problem gonna be solved...

Neither... it's the SD slot.  It's a gimped UHS-I bus with a max rate of 41MB/s.  You can use the fastest SD card on the planet and it will still be 41MB/s.

We talked earlier about attaching a USB card reader to the camera's USB port... if ML ever made that possible, I'd skip the card reader and just plug in a USB flash drive.  I've got a 64GB USB 3.0 stick that writes at 175MB/s, it would be amazing if I could just write date to that thing!  Only problem is there is currently no Canon DSLR that offers USB 3.0 that doesn't also offer a CF slot...
Glass: EF-S 24mm f/2.8 STM, EF 50mm f/1.8, EF-S 55-250mm IS STM, EF-S 18-55mm IS STM

gsanchez922

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Re: Canon 70D
« Reply #406 on: January 04, 2015, 08:24:15 AM »
Neither... it's the SD slot.  It's a gimped UHS-I bus with a max rate of 41MB/s.  You can use the fastest SD card on the planet and it will still be 41MB/s.

We talked earlier about attaching a USB card reader to the camera's USB port... if ML ever made that possible, I'd skip the card reader and just plug in a USB flash drive.  I've got a 64GB USB 3.0 stick that writes at 175MB/s, it would be amazing if I could just write date to that thing!  Only problem is there is currently no Canon DSLR that offers USB 3.0 that doesn't also offer a CF slot...

the canon 70D has USB 2.0 and the top speed that u can get is 40MB/s never more than 60MB/s so we still in the same thing

X-STATE

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Re: Canon 70D
« Reply #407 on: January 04, 2015, 10:45:03 AM »
nikfreak, the main question:
AF works when you shooting RAW video?
Body: Canon EOS 70D Lenses: Sigma 18-35mm f1.8 DC HSM Canon EF 85 f/1.8 USM
70D.112

nikfreak

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Re: Canon 70D
« Reply #408 on: January 04, 2015, 11:32:37 AM »
What do you mean with AF works? Touching LCD screen to focus during recording? If that's the question then the answer is YES ;-)
70D.112 & 100D.101

Toni_m_m

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Re: Canon 70D
« Reply #409 on: January 04, 2015, 11:34:49 AM »
Nikfreak have you already shoot RAW video and if so can you post anything here?

nikfreak

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Re: Canon 70D
« Reply #410 on: January 04, 2015, 11:53:32 AM »
Toni nothing to share now. I shot 70D mlv yesterday to test write speeds. Got a mlv shot at resolution 1600x680 with something around 2.5GB if I remember correctly...
70D.112 & 100D.101

maitimaus

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Re: Canon 70D
« Reply #411 on: January 04, 2015, 03:06:54 PM »
@nikfreak this are amazing news :) how long were you abele to shoot 1600x680? which framerate?

gsanchez922

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Re: Canon 70D
« Reply #412 on: January 04, 2015, 05:11:25 PM »
@nikfreak I have a stupid question sorry for that... but is possible get more MPx from 70D something like 40MPx because Canon say is like the sensor is divided in 2 and have 20MPx so maybe with magic lantern we can have a possibility to get more MPx and loose the new system AF  and use manual focus or something like that? I know is something stupid that I ask but sorry I'm new in this and I only want to know

nikfreak

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Re: Canon 70D
« Reply #413 on: January 04, 2015, 05:22:06 PM »
Interesting question but refers to reverse engineering and I have no answer to that. Better let some core dev answer it.
70D.112 & 100D.101

X-STATE

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Re: Canon 70D
« Reply #414 on: January 04, 2015, 05:56:37 PM »
@nikfreak it is awesome!!! :D :D :D
any artifacts such as pink dots like on 650D?

Body: Canon EOS 70D Lenses: Sigma 18-35mm f1.8 DC HSM Canon EF 85 f/1.8 USM
70D.112

satriani

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Re: Canon 70D
« Reply #415 on: January 04, 2015, 07:40:07 PM »
Actually, there should not be this problem. Because the focus technology is different.
But there are still to discover some new stubs, which makes it very exciting :P
Cameras: Canon EOS 70D, Canon EOS 650D
Lenses: 2x CanonEF-S 18-135 IS STM, Sigma 50mm f1.4 DG HSM Art
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X-STATE

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Re: Canon 70D
« Reply #416 on: January 04, 2015, 08:00:42 PM »
what do you mean?
Body: Canon EOS 70D Lenses: Sigma 18-35mm f1.8 DC HSM Canon EF 85 f/1.8 USM
70D.112

DigitalVeil

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Re: Canon 70D
« Reply #417 on: January 05, 2015, 02:45:13 AM »
what do you mean?

The pink/blue dots on the 650D and 700D are "focus pixels" which perform contrast-detection when autofocus is enabled in video mode, instead of recording color information.  Normally these are thrown away, but they are kept when recording raw.  The 70D has a totally different video AF system and shouldn't have that problem.
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TomJ

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Re: Canon 70D
« Reply #418 on: January 05, 2015, 03:12:17 AM »
Quote
Toni nothing to share now. I shot 70D mlv yesterday to test write speeds. Got a mlv shot at resolution 1600x680 with something around 2.5GB if I remember correctly...

Still, you got somewhere and somewhere is infinitely better than nowhere!! Right on Nik!

ShootMeAlready

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Re: Canon 70D
« Reply #419 on: January 05, 2015, 04:03:53 AM »
Ok still thinking outside the box here:
It seems that 70D should have dual processor power, for its AF system.

If you put it in MF, then there is a lot less going on with the processors.
So it seems that if you load up one processor sends to the EDMAC to write to the card at 40 MB/s
Then with the other processor you write to the USB, now the only bottle neck is the bus. 

I did read in some article a 50MB/s bus limit, but you know I haven't seen any hard facts or measurements to know if that is credible.
The outcome is now raw video in two places, USB file, and card file. That's a crazy work flow, and likely best done by equal distribute between both.
But like I said its outside of the box, and perhaps an avenue for higher raw resolution investigation at appropriate time.

Another more generic thought, is that for all ML cameras,  in MF/Manual mode/Manual ISO  a lot less is going on with the processor.
So why not attempt the same, and see if writing to two places can max out the bus, and improve raw video capture!!!  Perhaps FHD on a 550D/600D (we can dream) !!!

T3i+ML & 70D.112+ML, Tokina 11-16 2.8, Sigma 18-35 1.8, 50-150 II 2.8, 50 1.4, Canon 28 1.8, 35 2, 85 1.8 "Shoot Wide and Prosper"

DigitalVeil

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Re: Canon 70D
« Reply #420 on: January 05, 2015, 06:16:01 AM »
The 70D only has a single Digic 5+ processor, not two.  Even if it did have two, and disabling AF left one of them totally dedicated to copying bits from the sensor to storage, a dedicated Digic 5+ CPU still wouldn't be fast enough to do it at 24fps.  The 5D Mark III also has a single Digic 5+ processor and that camera must also use the EDMAC to copy data to storage in real-time.

I'm sure this is also just as unlikely, but I'm wondering if it would be even remotely possible to open up a 70D and swap the stock SD slot with a 104MB/s part.  If it were possible, I'd try it, working with hardware is something I like doing.
Glass: EF-S 24mm f/2.8 STM, EF 50mm f/1.8, EF-S 55-250mm IS STM, EF-S 18-55mm IS STM

walter_schulz

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Re: Canon 70D
« Reply #421 on: January 05, 2015, 06:55:38 AM »
SD-card interface hacking has been discussed here before.
http://www.magiclantern.fm/forum/index.php?topic=6128.msg45908#msg45908
If you do a Google site search you will find several quite enthusiastic posts earlier.
And no: No one delivered.

janoschsimon

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Re: Canon 70D
« Reply #422 on: January 05, 2015, 07:54:47 AM »
@nikfreak hurray first mlv whoop whoop :D keep up the great work guys :-)

ShootMeAlready

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Re: Canon 70D
« Reply #423 on: January 05, 2015, 08:26:30 AM »
DV you may want to buy a spare SD card part first, and disect/ discover the components and PCB pin layout ... just a thought before you rip into your camera.
Here is a few for a 600D which I had been thinking to investigate.

http://www.cameraspareparts.co.uk/pcb-assembly-sd-card-for-canon-eos-600d-dslr-camera-5972-p.asp

http://www.dhcameras.com/canon-eos-600d-eos-rebel-t3i-eos-kiss-x5-sd-board-pcb-memeory-card-part-new/
T3i+ML & 70D.112+ML, Tokina 11-16 2.8, Sigma 18-35 1.8, 50-150 II 2.8, 50 1.4, Canon 28 1.8, 35 2, 85 1.8 "Shoot Wide and Prosper"

anthonykeane

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Re: Canon 70D
« Reply #424 on: January 05, 2015, 09:30:33 AM »
Several cameras use the same PCB, is it possible that Canon have a standard SD Card PCB and maybe the higher Canon models just use an up-spected PCB?

anyone know of a link to the spare parts for the higher spec cameras?
20D, 70D, 50mm 1.4, 18-135