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Messages - JohnBarlow

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51
Tragic Lantern / Re: Uncompressed 600D Raw Video
« on: May 27, 2013, 03:58:06 PM »
I have a request to fix the 4gb limit.

I have been doing exhaustive tests of 1136 x 694 in 720p camera mode, at 12FPS and 1/53 shutter override.

For me this gives the full height of the sensor and is just perfect for a 2x Scope.

At 12FPS with Twixtor it gives a easy tween to 24FPS for low motion content like interviews and such.

On a cheapo 200x SDHC card it runs effortlessly time after time up to the 4gb limit then stops, so if you nice people can fix the 4gb limit then it would be perfect.


52
Tragic Lantern / Re: Uncompressed 600D Raw Video
« on: May 25, 2013, 08:21:42 PM »
Please service my request for 720 x 640 or provide custom selectable aspect ratio

Thanks

53
Tragic Lantern / Re: Uncompressed 600D Raw Video
« on: May 25, 2013, 07:16:21 PM »
Please consider my request for 720 x 640 (8:9)

With a 2x scope and 24mm lens should look good 720 x 1280 :)

also its the best vertical resolution !

54
Tragic Lantern / Re: Uncompressed 600D Raw Video
« on: May 25, 2013, 05:03:38 PM »
720x640 will give nice 720x1280 with a 2x scope :)

55
Tragic Lantern / Re: Uncompressed 600D Raw Video
« on: May 25, 2013, 12:20:05 AM »
If that is so I wonder if we can sample alternate rows and columns to preserve FOV?

(OK because of mosaic alternate double rows and columns)

This would be better than a quarter crop; yes?

 
I can shoot continously in 960 X 540 at 24 frames per second. An even lower resolution should be no problem.

56
Other experimental builds / Re: 12-bit (and 10-bit) RAW video
« on: May 23, 2013, 08:07:55 PM »
Thanks!

RAW is beyond these. It becomes sRGB or Adobe RGB when exporting (baking) from bayer raw to RGB in any Raw Converter (ACR, Lightroom, etc).

57
Other experimental builds / Re: 12-bit (and 10-bit) RAW video
« on: May 23, 2013, 07:24:26 PM »
Do you mean you can have either?


Both? Neither? Whichever one you pick?

58
Other experimental builds / Re: 12-bit (and 10-bit) RAW video
« on: May 23, 2013, 07:14:06 PM »
Maybe silly questions--->

Is this sRGB or ADobe RGB?

If the former will it cause a processor drain?

Is Adobe RGB possible seeing that we are dealing with a stream of stills?

59
Raw Video / Re: Raw video on 5DMK2
« on: May 19, 2013, 05:26:19 PM »
I agree, I think there must be some processor drain with actual images, based on your results.

Good test BTW!

Thanks a.d. !!

Test conditions:

- Komputerbay 32GB 1000x
- CF card in camera formatted prior to each setting
- 3 consequtive runs
- black image (lens cap on)

Results:

- @ 1880x840 25fps hacked on: 1104 (64.1 MB/s), 4GB limit (65.2 MB/s), 1426 (64.6 MB/s)
- @ 1880x840 24fps hacked on: 4GB limit (63.1 MB/s), 4GB limit (63.1 MB/s), 4GB limt (63.1 MB/s) <- stable!
 
- @ 1880x840 25fps hacked off: 1280 (64.5 MB/s), 1288 (64.5 MB/s), 1380 (64.5 MB/s)
- @ 1880x840 24fps hacked off: 4GB limit (63.1 MB/s), 4GB limit (63.1 MB/s), 4GB limt (63.1 MB/s) <- stable!

- @ 1880x960 25fps hacked on: 181 (64.1 MB/s), 189 (64.2 MB/s), 172 (64.2 MB/s)
- @ 1880x960 24fps hacked on: 246 (65.4 MB/s), 246 (65.1 MB/s), 246 (65.1 MB/s)

- @ 1880x960 25fps hacked off: 181 (64.5 MB/s), 181 (64.6 MB/s), 181 (64.3 MB/s)
- @ 1880x960 24fps hacked off: 246 (65.1 MB/s), 246 (64.8 MB/s), 246 (64.9 MB/s)

I have the impression while "hacked on" gives higher peak rates, "hacked off" results in more stable write speeds.
I also did a couple of tests with actual footage (not just lens cap on black images) and that resulted in considerably lower frame counts. How is that possible with uncompressed RAW footage? Is DNG somehow compressed? (fast runlength compression or something like that?)

60
Has anyone looked at the service repair manuals for these cameras?

I took a look at some parts catalogs and there seems to be ribbon connections between the main PCB and the Card Controller PCB and the Card Slot board. I wonder if this ribbon connector can be hooked up to something on the outside?

61
General Development / Re: uncompressed 14-bit RAW video recording
« on: May 18, 2013, 05:05:05 PM »
What is the status of 5D2 aquisition?

If I can get a stable 1280x1080 I will be so happy

62
General Development / Re: uncompressed 14-bit RAW video recording
« on: May 17, 2013, 04:09:43 PM »
Ok my bad, must have missed it

63
General Development / Re: uncompressed 14-bit RAW video recording
« on: May 17, 2013, 03:55:17 PM »
To the devs  --->

Is it possible to bit shift or similar bit trix the raw stream to get to 12 bit instead of 14?

I am thinking this could be good for 550d/600d shooters with card controller limitations, giving an effective 4x speed increase

64
General Development / Re: uncompressed 14-bit RAW video recording
« on: May 15, 2013, 07:54:46 PM »
and who will write the new firmware for DryOS to communicate with the changed slot?

I appreciate what your sayin, but maybe the existing code just needs a tweak? No one really know at this juncture.

65
General Development / Re: uncompressed 14-bit RAW video recording
« on: May 15, 2013, 06:54:13 PM »
My first post, so my thanks and congratulations go out to all the devs involved in bringing this home.

I saw this post


I don't think the UHS-I pins on the cards are supported by the Canon DSLRs, only the normal interface. So you're still going to get the normal SD card speeds whether it's UHS or not. I have been designing a device that plugs into the SD card slot of the DSLR and accesses the SPI pins. An ARM chip then emulates an SD card with data storage on a FAT32 partitioned SSD. This would allow very high data speeds. That will erase the problems of the SD card being too slow, but I have no idea how fast the SPI Bus on the canon cameras can go. Does anybody know of the max mhz the bus can run at?

Thanks

and I also would like to vent an idea with all concerned.

For starters check out this vid--->
http://www.youtube.com/watch?feature=endscreen&NR=1&v=qgwTCn_X8Wg

This geeza managed to replace the SD Slot controller board on a 450D with complete instructions. At time 3:16 you can see the board, which by the way only costs $30 from Canon spares.

This got me thinking - what if the board from a 700D has a faster transfer rate and can be used in the 550D/600D etc ??? OR what if a cable can be hooked up to an exterior device like a CF or SSD????

I dont have the skills but a hardware guru could in principle cook something up.

Share your thoughts......


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