Canon 650D [OLD]

[red5446]

That's as good as it gets on the 650D, so yes. That card is ok

will be possible with a SanDisk Extreme Pro 95MB/s UHS-I to get double speed? so maybe we can achieve at least 720p at 90Mbs.?

[dngrhm]

will be possible with a SanDisk Extreme Pro 95MB/s UHS-I to get double speed? so maybe we can achieve at least 720p at 90Mbs.?

No. This appears to be a limitation of the SD hardware in the 650D.  ~40MB/s

[slingkidy]

cool it work. but what i really wanted is the audiometer. it is a way to get it??? i just buy a audio amp, a RCA spliter and the canon rca cable for monitoring??

[red5446]

No. This appears to be a limitation of the SD hardware in the 650D.  ~40MB/s

in the specifications of t4i it says that it supports the latest  UHS-I SDHC cards.

here http://www.imaging-resource.com/PRODS/canon-t4i/canon-t4iA6.HTM it says that with a SanDisk Extreme Pro 95MB/s the Time per shot, averaged over 6 shot buffer capacity.
so if we are making something like it´s the 1/9 of a default raw wich is 18MP maybe we can dream a little of taking HD video wich is only 2MP.

[nanomad]

Well, the time per shot it's the same with a sandisk 45MB/s

[Gorilla]

so if we are making something like it´s the 1/9 of a default raw wich is 18MP maybe we can dream a little of taking HD video wich is only 2MP.

Each image may only be 1/9th the resolution (and, ostensibly, the size) of a full RAW image, but remember that HD video is taking a minimum of 24 of those frames every second.

[lordgnagey]

I only use the SanDisk UHS-1 Cards, and I will absolutely be testing RAW .dng sequence video like crazy when it is implemented. I will probably do a test shoot in Death Valley or on Mt. Wilson just to put it through the paces.

I've successfully installed the second pre-alpha on my camera and I have noticed a bug, I'm not sure if it's been reported before:

When using the standard zoom function (magic zoom turned off) in Manual Video mode i noticed that I got a strange pink abberation of lines and static (in the box) whenever I moved the frame or tried to adjust the focus box. I'll retest when I get back to see if the issue persists.

[dngrhm]

in the specifications of t4i it says that it supports the latest  UHS-I SDHC cards.

here http://www.imaging-resource.com/PRODS/canon-t4i/canon-t4iA6.HTM it says that with a SanDisk Extreme Pro 95MB/s the Time per shot, averaged over 6 shot buffer capacity.
so if we are making something like it´s the 1/9 of a default raw wich is 18MP maybe we can dream a little of taking HD video wich is only 2MP.

UHS-I can either support a clock of 100MHz writing 4-bits (1/2 byte) per clock = 50 MB/s or UHS104 specifies a 208MHz clock writing 4-bits per clock = 104 MB/s.  The SD controller in the T4i is a Macronix MX25L6436EM2I-10G with a clock speed of 104MHz.  The T4i will not support anything faster than 50MB/s. Slice and dice your video however you want.  That is the (theoretical maximum) hose you have to work with. 

[scout72]

UHS-I can either support a clock of 100MHz writing 4-bits (1/2 byte) per clock = 50 MB/s or UHS104 specifies a 208MHz clock writing 4-bits per clock = 104 MB/s.  The SD controller in the T4i is a Macronix MX25L6436EM2I-10G with a clock speed of 104MHz.  The T4i will not support anything faster than 50MB/s. Slice and dice your video however you want.  That is the (theoretical maximum) hose you have to work with.

Sorry to be daft- but just trying to understand this limitation- how does this apply to CBR override for instance on the T3i? CBR 1.4 for instance has been shown to be around 62mb/s?

Sorry, just looked in to this more, it is- bits vs bytes...CBR not using nearly as much throughput as RAW

[ChodaBoy]

UHS-I can either support a clock of 100MHz writing 4-bits (1/2 byte) per clock = 50 MB/s or UHS104 specifies a 208MHz clock writing 4-bits per clock = 104 MB/s.  The SD controller in the T4i is a Macronix MX25L6436EM2I-10G with a clock speed of 104MHz.  The T4i will not support anything faster than 50MB/s. Slice and dice your video however you want.  That is the (theoretical maximum) hose you have to work with.

I wonder if the T5i fixed this by using the 208MHz part?

[newsense]

I wonder if the T5i fixed this by using the 208MHz part?

Good question. Got a T5i, if so could you open it up and see what SD controller it uses?

[nanomad]

UHS-I can either support a clock of 100MHz writing 4-bits (1/2 byte) per clock = 50 MB/s or UHS104 specifies a 208MHz clock writing 4-bits per clock = 104 MB/s.  The SD controller in the T4i is a Macronix MX25L6436EM2I-10G with a clock speed of 104MHz.  The T4i will not support anything faster than 50MB/s. Slice and dice your video however you want.  That is the (theoretical maximum) hose you have to work with.

Thanks for not making two devs waste their time in pointless experiments
Do you have a source for that info? (even in pm)

[dngrhm]

Thanks for not making two devs waste their time in pointless experiments
Do you have a source for that info? (even in pm)

Info on UHS (necessary to equate clock speed to data rate)
http://en.wikipedia.org/wiki/Secure_Digital#UHS_Speed_Class
Identify part in 650D (you can either check the print on the ICs or there is a part list at the bottom )
http://www.chipworks.com/blog/recentteardowns/2012/07/06/inside-the-canon-rebel-t4i-dslr/
Info on SD controller
http://datasheet.octopart.com/MX25L6436EM2I-10G-Macronix-datasheet-15540225.pdf

[nanomad]

Thanks

Note for me: Audio IC is AK4950 -> http://www.asahi-kasei.co.jp/akm/en/product/ak4950/ak4950_f01e.pdf

[slingkidy]

NANOMAD does the ml t4i have a audiometer

[dngrhm]

NANOMAD does the ml t4i have a audiometer

The T4i has an audio meter in the Canon menu, though no persistent display.  Setting a manual gain is also available.  This is difficult to get into ML for now as the Audio IC has changed.  The higher priority is just getting ML to work on the T4i.

The request has been stated many times throughout this thread.  You are not alone in your desire ML audio meter goodness. 

[1%]

Audio meter works on eos M while recording... it should work here too... but does not work at idle.

[Lucas_W]

Auto-ETTR looks interesting [Check out the bitbucket log! ] I wonder what it could get out of the 650D?

http://en.wikipedia.org/wiki/ETTR
https://bitbucket.org/hudson/magic-lantern/commits/all

Also, as the newly appointed moderator for this 'New ports' section, along with blade,

Hello!

[roterrion]

Also, I as the newly appointed moderator for this 'New ports' section, along with blade,

Hello!

hi! cool blue bars you got there, dude! keep up your nice work!

[blade]

Also, as the newly appointed moderator for this 'New ports' section, along with blade,
Hello!

Also from me, Hello...

[adrian2013]

hello please can you tell me if it works on magic lantern canon 650 d and if so where to find this firmware I can say is just beginning in this world of photography.thank you !

[Gorilla]

hello please can you tell me if it works on magic lantern canon 650 d and if so where to find this firmware I can say is just beginning in this world of photography.thank you !

The firmware is in the early stages of development right now, meaning it works to some degree but there are features missing and bugs that pop up. It's best if you wait for a later version to be released before you start using it, but if you really must try it now, you can find the files and instructions to do so just by going back through the pages of this thread.

[adrian2013]

Thank you very much for the reply, I expect stable version

[multi.flexi]

Few thoughts about RAW video:

1. Is it possible to use USB instead of SD card? Theoretically it is 60MB/s. Practically? And would PC or/and USB stick work?
2. One crazy thought: What about combining USB and SD card. For example odd frames would be stored on SD card and even through USB on USB stick or computer. And it would be combined in post-production similarly like HDR video.
3. Is it possible to shoot in RAW but only capture luminosity? Black & white picture would require lower bit rate.
4. Instead of using RAW would jpeg work better?

Thanks for your work. I am thankful user of pre-alpha 2.

[_DK_]

1: The theoretical Maximum of USB is around 60MB/s. Practically that is not often reached, usually USB sticks come around 30MB/s, which would be even slower than an SD card solution. Somebody would have to tell us how fast the USB controller is.
My Opinion is that USB would be awesome, because we could use cheap HDDs or SSDs. But I don't know whether it would work over USB at all.

2: No idea, if that is possible.

3: As far as I understand that is not possible. Processing the pictures to black and white would need the CPU to do that to 24 images per second! The CPU can not handle this.
Right now the CPU does nothing at all. All that the RAW feature does is simply writing the image "on" the Sensor directly to SD. So the CPU is in idle all the time.

4: Same as 3. This would require much more processing power.