Re: Some advice on video frame grabbing
On 1/31/04 7:12 PM, "Doug Lerner" <[EMAIL PROTECTED]> wrote: With regard to > Weird thing 2 > - > You know my original problem of the grabbed frame not showing up in the > target image? If I quit the IDE, then the first time I try it it will work. > But for subsequent times it will not work. This is 100% reproducible. I'm narrowing down the problem. The image is actually there! If I select it with the pointer tool I can't see it, but... if I select the image with the object inspector the image shows up. What gives? Strangeness all around. I even got a Rev "error in selecting image" dialog pop up once... I wonder if there is something wrong with my IDE... doug ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Some advice on video frame grabbing
There are several things happening that are strange: Weird thing 1 - If I close the stack in which I am embedding the video grabber window, sometimes the stack's closeStack handler is not being called. I know it isn't being called because it is doing various things, like setting the hilite of a button in another stack and doing "revCloseVideoGrabber" and sometimes those messages are just not being sent. When would a stack not execute it's own local closeStack handler even though the stack is being closed? Weird thing 2 - You know my original problem of the grabbed frame not showing up in the target image? If I quit the IDE, then the first time I try it it will work. But for subsequent times it will not work. This is 100% reproducible. [EMAIL PROTECTED] ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Some advice on video frame grabbing
On 1/31/04 6:14 PM, "Chipp Walters" <[EMAIL PROTECTED]> wrote: >>> >>> set the defaultStack to "theStackWithTheVideo" >> >> You mean the stack with the video grabber window in it? > > Yep >> >> Well, as a test I can do that in the sample stack. It would be hard to >> do as >> a test in my current app now considering how complicated it has gotten. >> >> But weirdest of all - it worked one time! But I couldn't repeat it >> after >> that. >> >> Also, sometimes the revCloseVideoGrabber that I call when I close the >> video >> grabber window (in closeStack) does not seem to get sent and I need to >> invoke it manually. >> > Still sounds like a defaultStack or topStack problem to me. Can't you > just grow the window and add an image to test? Yes, that is a good idea. That would be easy to do. I think I am having a problem with "mixed signals" though. For example, I am starting my "repeat loop" for QT inside openStack. I think I'll try and move things around first. By the by, the video grabber doesn't *really* reside in a stack anyway - it's a special sort of a global window - so I don't see how defaultStack settings could apply. doug ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Some advice on video frame grabbing
set the defaultStack to "theStackWithTheVideo" You mean the stack with the video grabber window in it? Yep Well, as a test I can do that in the sample stack. It would be hard to do as a test in my current app now considering how complicated it has gotten. But weirdest of all - it worked one time! But I couldn't repeat it after that. Also, sometimes the revCloseVideoGrabber that I call when I close the video grabber window (in closeStack) does not seem to get sent and I need to invoke it manually. Still sounds like a defaultStack or topStack problem to me. Can't you just grow the window and add an image to test? ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Some advice on video frame grabbing
On 1/31/04 5:57 PM, "Chipp Walters" <[EMAIL PROTECTED]> wrote: > Doug, > > I haven't used video frame grabbing, but I might suggest some things to > look at: > > When you call: > revVideoFrameImage userImageWidth, userImageHeight, "videoimagedata" > > you might want to include before it: > > set the defaultStack to "theStackWithTheVideo" You mean the stack with the video grabber window in it? > > (I assume it is not a palette, if it is, it might NOT work at all) It's not a palette. > > Also, see if you can do it all on the same stack as a test (just like > the example). If it does work, then you can isolate your frontmost > stack issues from there. Well, as a test I can do that in the sample stack. It would be hard to do as a test in my current app now considering how complicated it has gotten. But weirdest of all - it worked one time! But I couldn't repeat it after that. Also, sometimes the revCloseVideoGrabber that I call when I close the video grabber window (in closeStack) does not seem to get sent and I need to invoke it manually. Thanks, doug > > hope you get it working, > Chipp > > > > On Jan 31, 2004, at 2:38 AM, Doug Lerner wrote: > >> I have a question for you experts. >> >> I basically copied scripts from the sample video stack (where this >> works >> correctly), and most of it seems to be working in my stack. But when I >> try >> to grab a frame from the video grabber window it does not display in >> the >> target image after I use the "set imageData" command. >> >> Without boring you with all my code, this is the snippet that grabs the >> frame and sets the imageData: >> >> put empty into videoimagedata >> >> put the width of image "userPortrait" of stack portraitName into >> userImageWidth >> >> put the height of image "userPortrait" of stack portraitName into >> userImageHeight >> >> revVideoFrameImage userImageWidth, userImageHeight, "videoimagedata" >> >> set the imageData of image "userPortrait" of stack portraitName to >> videoimagedata >> >> >> Seems vanilla enough, right? The only thing I am doing different from >> the >> sample scripts is that my target image happens to be in another stack. >> >> All the stacks/windows are open and everything has the correct height >> and >> width set. >> >> If I log userImageWidth, userImageHeight and the captured >> videoimagedata, >> there are what seem to be correct values in all of them. Well, the >> height >> and width anyway seem correct. I can't visually confirm that the value >> of >> videoimagedata is correct, but it is the correct size - userImageWidth >> x >> userImageHeight x 4. >> >> If I "put image userPortrait" there is what appears to be PNG data in >> there. >> >> If I check the "number of characters of the imageData of image >> userPortrait" >> there is the correct 57,600 characters in there (the image is 120x120). >> >> And the paintCompression of image userPortrait is "png" in my stack >> and also >> in the sample stack. >> >> But: >> >> * No image is displayed (even though it is displayed in the video >> grabber >> window of course) >> >> * If I "put the imageData of image userPortrait" the value displayed >> looks >> empty in the message box - not even garbage characters. >> >> Any ideas? >> >> Thanks! >> >> doug >> >> >> ___ >> use-revolution mailing list >> [EMAIL PROTECTED] >> http://lists.runrev.com/mailman/listinfo/use-revolution >> > > ___ > use-revolution mailing list > [EMAIL PROTECTED] > http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Some advice on video frame grabbing
Doug, I haven't used video frame grabbing, but I might suggest some things to look at: When you call: revVideoFrameImage userImageWidth, userImageHeight, "videoimagedata" you might want to include before it: set the defaultStack to "theStackWithTheVideo" (I assume it is not a palette, if it is, it might NOT work at all) Also, see if you can do it all on the same stack as a test (just like the example). If it does work, then you can isolate your frontmost stack issues from there. hope you get it working, Chipp On Jan 31, 2004, at 2:38 AM, Doug Lerner wrote: I have a question for you experts. I basically copied scripts from the sample video stack (where this works correctly), and most of it seems to be working in my stack. But when I try to grab a frame from the video grabber window it does not display in the target image after I use the "set imageData" command. Without boring you with all my code, this is the snippet that grabs the frame and sets the imageData: put empty into videoimagedata put the width of image "userPortrait" of stack portraitName into userImageWidth put the height of image "userPortrait" of stack portraitName into userImageHeight revVideoFrameImage userImageWidth, userImageHeight, "videoimagedata" set the imageData of image "userPortrait" of stack portraitName to videoimagedata Seems vanilla enough, right? The only thing I am doing different from the sample scripts is that my target image happens to be in another stack. All the stacks/windows are open and everything has the correct height and width set. If I log userImageWidth, userImageHeight and the captured videoimagedata, there are what seem to be correct values in all of them. Well, the height and width anyway seem correct. I can't visually confirm that the value of videoimagedata is correct, but it is the correct size - userImageWidth x userImageHeight x 4. If I "put image userPortrait" there is what appears to be PNG data in there. If I check the "number of characters of the imageData of image userPortrait" there is the correct 57,600 characters in there (the image is 120x120). And the paintCompression of image userPortrait is "png" in my stack and also in the sample stack. But: * No image is displayed (even though it is displayed in the video grabber window of course) * If I "put the imageData of image userPortrait" the value displayed looks empty in the message box - not even garbage characters. Any ideas? Thanks! doug ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Some advice on video frame grabbing
I have a question for you experts. I basically copied scripts from the sample video stack (where this works correctly), and most of it seems to be working in my stack. But when I try to grab a frame from the video grabber window it does not display in the target image after I use the "set imageData" command. Without boring you with all my code, this is the snippet that grabs the frame and sets the imageData: put empty into videoimagedata put the width of image "userPortrait" of stack portraitName into userImageWidth put the height of image "userPortrait" of stack portraitName into userImageHeight revVideoFrameImage userImageWidth, userImageHeight, "videoimagedata" set the imageData of image "userPortrait" of stack portraitName to videoimagedata Seems vanilla enough, right? The only thing I am doing different from the sample scripts is that my target image happens to be in another stack. All the stacks/windows are open and everything has the correct height and width set. If I log userImageWidth, userImageHeight and the captured videoimagedata, there are what seem to be correct values in all of them. Well, the height and width anyway seem correct. I can't visually confirm that the value of videoimagedata is correct, but it is the correct size - userImageWidth x userImageHeight x 4. If I "put image userPortrait" there is what appears to be PNG data in there. If I check the "number of characters of the imageData of image userPortrait" there is the correct 57,600 characters in there (the image is 120x120). And the paintCompression of image userPortrait is "png" in my stack and also in the sample stack. But: * No image is displayed (even though it is displayed in the video grabber window of course) * If I "put the imageData of image userPortrait" the value displayed looks empty in the message box - not even garbage characters. Any ideas? Thanks! doug ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
