can someone crack open the dvx100 and rotate the CCD block??

Kyle Edwards · January 29th, 2005, 11:24 PM

Correct. It's a frame server, there is no compression/decompression. A pseudo-AVI. You can even keep the file in the same colour space with certain commands.

But if you bring it into Premiere...I think it's edited in RGB anyway...I forget. Probably not.

Chaim Bianco · January 30th, 2005, 12:52 AM

here is a link to a command line utility that may be good for what you want to do:

http://www.rt.com/man/jpegtran.1.html

" jpegtran works by rearranging the compressed data (DCT
coefficients), without ever fully decoding the image.
Therefore, its transformations are lossless: there is no
image degradation at all,...

The image can be losslessly transformed by giving one of
these switches:

-flip horizontal
Mirror image horizontally (left-right).

-flip vertical
Mirror image vertically (top-bottom).

-rotate 90
Rotate image 90 degrees clockwise.

-rotate 180
Rotate image 180 degrees.

-rotate 270
Rotate image 270 degrees clockwise (or 90 ccw).
"

Monty Markland · January 30th, 2005, 02:04 AM

Aaron,

I preface this post with the caveat that I am a complete newb at all of this...

I believe James is referring to the fact that if you rotate the device(s) on the image plane, then, whenever you captured an image without the adapter attached, the image would be upside down.

By physically rotating the CCDs you trade a flipped image with the adapter for a flipped image without the adapter.

To eliminate the flip in both cases you'll need to alter the image before it gets to the image plane, or after it has left the image plane.

Either before inside the adapter, between the adapter image plane and the capture image plane or, after the capture image plane by modifying the signal, as some of the posters are discussing.

From a non-technician's point of view, it seems like flipping the signal after the capturing image plane is more conceptually sound.

From what I've read in the past week, people already do that by putting a magnet under the viewfinder on some cameras and flipping in post.

Monty Markland

Giroud Francois · January 30th, 2005, 03:16 AM

why some guys are always doing it the hard way ?
go to australia to shoot peaople walking on the head ?

why not just put the camera upside down ? it is the same than rotating the CCD.
and this will solve only half of the problem... you still need to mirror the picture.

Oscar Spierenburg · January 30th, 2005, 07:30 AM

I suggested this before, but it looks to me much easier and less risky to crack open the LCD screen end find a way to flip (and mirror) the LCD glass. Maybe it's to compact to do it, but I'd rather try that first.

Obin Olson · January 30th, 2005, 09:19 AM

Post is the issue I can use aLCD screen on top of the camera and or a CRT professional monitor and have it sitting upside down..this is not that bad..the worst is the render of every single clip and the issue of editing i need the image flipped in post with no loss of quality

Brandon Greenlee · January 30th, 2005, 09:39 AM

Thats exactly what the avisynth program someone posted earlier will do.

You just run a script to flip the vertical axis. No quality loss ect.

Juan M. M. Fiebelkorn · January 30th, 2005, 04:04 PM

jpegtran is not Avisynth related.
Also if you were using Avisynth you would be decompressing-compressing the image.
Fliping an image thru Avisynth means you need to RECOMPRESS, period.

Kyle Edwards · January 30th, 2005, 05:49 PM

After you are done editing recompression will happen. Not anytime before or during.

January 30th, 2005, 12:52 AM	#17
Chaim Bianco Regular Crew Join Date: Jul 2003 Location: Philadelphia , PA Posts: 39	jpegtran here is a link to a command line utility that may be good for what you want to do: http://www.rt.com/man/jpegtran.1.html " jpegtran works by rearranging the compressed data (DCT coefficients), without ever fully decoding the image. Therefore, its transformations are lossless: there is no image degradation at all,... The image can be losslessly transformed by giving one of these switches: -flip horizontal Mirror image horizontally (left-right). -flip vertical Mirror image vertically (top-bottom). -rotate 90 Rotate image 90 degrees clockwise. -rotate 180 Rotate image 180 degrees. -rotate 270 Rotate image 270 degrees clockwise (or 90 ccw). " __________________ www.splitbrain.com

January 30th, 2005, 02:04 AM	#18
Monty Markland New Boot Join Date: Jan 2005 Location: Dallas, Texas Posts: 17	Using the camera without the adapter Aaron, I preface this post with the caveat that I am a complete newb at all of this... I believe James is referring to the fact that if you rotate the device(s) on the image plane, then, whenever you captured an image without the adapter attached, the image would be upside down. By physically rotating the CCDs you trade a flipped image with the adapter for a flipped image without the adapter. To eliminate the flip in both cases you'll need to alter the image before it gets to the image plane, or after it has left the image plane. Either before inside the adapter, between the adapter image plane and the capture image plane or, after the capture image plane by modifying the signal, as some of the posters are discussing. From a non-technician's point of view, it seems like flipping the signal after the capturing image plane is more conceptually sound. From what I've read in the past week, people already do that by putting a magnet under the viewfinder on some cameras and flipping in post. Monty Markland

January 30th, 2005, 09:39 AM	#22
Brandon Greenlee Major Player Join Date: Dec 2004 Location: North Alabama Posts: 242	Thats exactly what the avisynth program someone posted earlier will do. You just run a script to flip the vertical axis. No quality loss ect. __________________ Brandon Greenlee

January 29th, 2005, 11:24 PM	#16
Kyle Edwards Major Player Join Date: Nov 2004 Location: LI, NY Posts: 274	Correct. It's a frame server, there is no compression/decompression. A pseudo-AVI. You can even keep the file in the same colour space with certain commands. But if you bring it into Premiere...I think it's edited in RGB anyway...I forget. Probably not.

January 30th, 2005, 03:16 AM	#19
Giroud Francois Inner Circle Join Date: Feb 2004 Location: switzerland Posts: 2,133	why some guys are always doing it the hard way ? go to australia to shoot peaople walking on the head ? why not just put the camera upside down ? it is the same than rotating the CCD. and this will solve only half of the problem... you still need to mirror the picture.

January 30th, 2005, 07:30 AM	#20
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	I suggested this before, but it looks to me much easier and less risky to crack open the LCD screen end find a way to flip (and mirror) the LCD glass. Maybe it's to compact to do it, but I'd rather try that first.

January 30th, 2005, 09:19 AM	#21
Obin Olson Trustee Join Date: Jan 2003 Location: Wilmington NC Posts: 1,414	Post is the issue I can use aLCD screen on top of the camera and or a CRT professional monitor and have it sitting upside down..this is not that bad..the worst is the render of every single clip and the issue of editing i need the image flipped in post with no loss of quality

January 30th, 2005, 04:04 PM	#23
Juan M. M. Fiebelkorn Major Player Join Date: Jun 2004 Location: Buenos Aires , Argentina Posts: 444	jpegtran is not Avisynth related. Also if you were using Avisynth you would be decompressing-compressing the image. Fliping an image thru Avisynth means you need to RECOMPRESS, period.

January 30th, 2005, 05:49 PM	#24
Kyle Edwards Major Player Join Date: Nov 2004 Location: LI, NY Posts: 274	After you are done editing recompression will happen. Not anytime before or during.