On Fri, Oct 24, 2008 at 12:14 AM, <[EMAIL PROTECTED]> wrote: > I have some comments on Bhaaluu's onion-skinning tutorial which is > included at the end of this message.
WOW! Your comments and suggestions are invaluable! This post is a keeper. One other little thing that I did that I found very helpful. Usually a pencil-test that is made into a video doesn't translate very well into an MPEG video because the pencil lines are too light/thin, or something. What I did to make the lines darker was this on each PPM that I saved: Filters > Artistic > Cartoon... [X] Preview Mask Radius: 23.27 Percent black: 0.500 Now, I really don't know what those things do, so I just played with the sliders until I got what I wanted. What I wanted just turned out to be the above settings. I can't wait to try the new tutorial out! Gimp-GAP tutorials are hard to find, even with Google, so this is a jewel. Thank you ever so much, saulgoode. -- b h a a l u u at g m a i l dot c o m Kid on Bus: What are you gonna do today, Napoleon? Napoleon Dynamite: Whatever I feel like I wanna do. Gosh! > > Step 9 instructs the user to perform a "File->Open" the second frame > (f_000002.xcf). When using GAP, you should not use File->Open to > navigate frames; use one of the commands: "Video->Go To" (which is > useful to assign keyboard shortcuts), "Video->Playback" (which > provides some nice "scrubbing" functionality), or "Video->VCR > Navigator" (which provides easy cut-n-pasting of frames). Not only > will the operation take much less time, but some operations depend > upon GAP managing the displays. Step 9 should instruct "Video->Go > To->Next Frame". > > In Step 8, the Stack Position line should have a "0" in it; specifying > that the onionskin layer should be placed at the top of the layerstack. > Stack Position: 0 [From Top] > > In Step 10, the onion-skin layer should appear above the background > layer in the layerstack and it should be unnecessary to lower it (if > the instructions in the preceding comment are followed). > > In Steps 11 to 14, it would probably be better to use the Move Tool to > align the layers, rather than the Selection Tool. The method that > Bhaaluu proposed will only work with older versions (2.2 and earlier) > of GIMP, whereas using the Move Tool works with all versions. The Move > Tool permits the keyboard cursor keys to be used for moving in > single-pixel increments (or SHIFT-cursor for larger steps). This also > eliminates the need to make a selection and the need to anchor the > layer. > > Instead of performing Steps 15 and 16, just move on to the next frame. > Because the onionskin setup includes the "Auto delete before saving", > the XCF file which gets saved (before you go to a different frame) > will not have the onionskin layer. After you are done with all of your > editing, delete the onionskin configuration, and use the > "Video->Frames Convert..." command to save your results as PNM files. > > In Step 17, again "File->Open" should not be used. To navigate to the > second frame, use one of the methods suggested in my first comment. > > Finally, the instructions of Step 19 suggest that using onionskin > layers is not the best approach for this task. Onionskinning is useful > if you want to align frame 2 with frame 1, frame 3 with frame 2, frame > 4 with frame 3, and so on. It is not a particularly good method to > align frame 2 with frame 1, frame 3 with frame 1, frame 4 with frame > 1, etc. > > I would propose the following approach to accomplish the latter task > (the first seven steps are identical to Bhaaluu's tutorial): > > 1. Create new directory and save all PNM files to the new directory. > 2. Change to the new directory, and create a directory: PNM > 3. Copy all the PNM files to the PNM directory. This is a backup. > 4. Open The Gimp. > 5. File > Open > f_01.pnm > 6. Video > Frames Convert... > Extension: .xcf > GAP saves all the PNM files as XCF files, in sequential order. > 7. Close f_01.pnm. > 8. In f_000001.xcf window, perform an "Image->Duplicate". A new > "Untitled" image should be displayed. > 9. In f_000001.xcf window, perform a "Video->Move Path". Change the > Stepmode to "None" and change the Opacity to "50%" (the From and To > frames should be the first and last frames). Press OK. -- this will > create a copy of the first frame as the top layer of each of the frames. > 10. Perform a "Video->Go To->Next frame". (You should assign this > command to a keyboard shortcut. I have assigned my F5, F6, F7, and F8 > keys to First, Previous, Next, and Last frame commands respectively.) > > 11. Activate the bottom layer ("Layer->Stack->Select Bottom Layer"). > This is conveniently accomplished with the END key. > 12. Activate the Move Tool (keyboard shortcut "M"). Hold down the > SHIFT key and use the mouse to align your registration points (or use > the cursor keys) > > Repeat Steps 10 through 12. This amounts to the following keystrokes: > F7, END, cursor keys and should be rather quick to accomplish. If it > is necessary to use the Rotate Tool, you will have to anchor the > floating layer. > > 13. Go to the first frame ("Video->Go To->First Frame") > 14. Perform a "Video->Frames Layer Delete" and delete "layerstack: > 0" from the first to the last frame (leaving only your background). > 15. Perform a "Video->Frames Convert..." as in Step 6, only change > the extension to ".pnm". > > > The GAP is rather intimidating at first; but it can be a powerful tool > for accomplishing repetitive image editing tasks, not just animations. > > > -------------------------------------------------------- > ============================== > == START OF QUOTED TUTORIAL == > ============================== > > On Thu, 23 Oct 2008, Bhaaluu wrote: > > Recently, I asked a question about how to use the Onionskin feature > of the Gimp Animation Package. The following is a Summary of what I > did to align a series of drawings that had registration crosshairs > with the crosshairs on the first drawing, so all the drawings would > be registered with each other. The drawings were all scanned into > the computer using a flatbed scanner. All the drawings were saved > as PNM image files from the scanner. The directions I was given were > good for onionskinning a drawing with the one right behind it in > numerical order. I slightly modified those instructions to align all > 62 drawings with the very first drawing. > > 1. Create new directory and save all PNM files to the new directory. > 2. Change to the new directory, and create a directory: PNM > 3. Copy all the PNM files to the PNM directory. This is a backup. > 4. Open The Gimp. > 5. File > Open > f_01.pnm > 6. Video > Frames Convert... > Extension: .xcf > GAP saves all the PNM files as XCF files, in sequential order. > 7. Close f_01.pnm. > 8. In f_000001.xcf window: > Video > Onionskin > Configuration... > Reference Mode: Normal > Onionskin Layers: 1 > Frame Reference: -1 > Stack Position: [X] From Top > Opacity: 50.0 / 100.0 > Select Mode: All Visible (ignore pattern) > [X] Auto create after load > [X] Auto delete before save > Click [Okay] > 9. File > Open > f_000002.xcf > 10. In the Layers window, make sure the onionskin_000001 layer is above > the Background layer otherwise, the onionskin effect can't be seen. > I used the down arrow in the Layers window to move the Background > down one. That will make the onionskin appear. > 11. Lasso both drawings. > 12. View > Zoom to whatever magnification you need to align the cross- > hairs. I used 200%. > 13. With the mouse cursor inside the lassoed area, press the mouse > button and drag until the crosshairs are aligned. > 14. Click outside of the lassed area to anchor the drawing. > 15. Right click the onionskin_000001 layer in the Layers windows and > Delete Layer. Clean up drawing with eraser, or whatever. > 16. Save the file. > 17. File > Open > f_000002.xcf > 18. Move the Background under the onionskin layer in the Layers window. > 19. Video > Onionskin > Configuration... > Frame Reference: -2 > Click [Okay] > What this does is makes the first drawing the reference drawing. > On each new drawing I open, I will move the Background below the > onionskin layer, and change the Frame Reference in the Onionskin > Configuration. The next change will be to -3, then -4, and so on. > Each time this is done, new onionskin layers are built for the > remaining files, so this may not be good if you have 1000's of > drawings. It wasn't so bad with only 62 drawings. > 20. Follow steps 11 to 16. > > I make videos for YouTube with PPM files, so I did a Save As... after I > saved each XCF file, and saved a PPM copy of the registered image of > the drawing in a PPM directory as I went along. Likewise, I organize > the other files in the same way: XCF files go in a XCF directory, etc. > > I found out that if a drawing was cocked, I could first align the > crosshairs, then use the rotate tool with the center placed on the > aligned crosshairs, to uncock it. My experience doing this has > convinced me that attaching a pegbar to the scanner is the best > way to solve the problems I experienced. This is my first flatbed > scanner, so I'm learning things the hard way.. > > Many thanks to "saulgoode" for the expert instructions that allowed me > to use The Gimp GAP Onionskin tool to do exactly what I wanted to do! > > I believe that what I am posting is correct to the best of my knowledge. > Your mileage may vary. I am not responsible for how you use this info, > nor for any damage which may directly or indirectly occur as a result > of you using this info. Best of luck in all your Gimp-GAP adventures! > > _______________________________________________ > Gimp-user mailing list > Gimp-user@lists.XCF.Berkeley.EDU > https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user > _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user