Re: [pygame] PyOpenGL Screenshots
hi again, note, you can convert a series of images with image magik, or the gimp most easily I think... convert -delay 20 -loop 0 bla*.tga animated.gif Or opening them as gimp layers, then saving to an animated gif. cu, On Wed, May 7, 2008 at 2:44 PM, René Dudfield <[EMAIL PROTECTED]> wrote: > looks like pyopengl 3.x returns a numpy array now instead of a string > by default... which breaks pygame.image.save on gl with pyopengl 3.x. > > Here's a work around screenshot function for gl. > > > def save_screen(screen, filename): > > def readScreen(x, y, width, height): > """ Read in the screen information in the area specified """ > glFinish() > glPixelStorei(GL_PACK_ALIGNMENT, 4) > glPixelStorei(GL_PACK_ROW_LENGTH, 0) > glPixelStorei(GL_PACK_SKIP_ROWS, 0) > glPixelStorei(GL_PACK_SKIP_PIXELS, 0) > > data = glReadPixels(x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE) > if hasattr(data, "tostring"): > data = data.tostring() > > return data > def saveImageData(width, height, data, filename): > """ Save image data """ > surface = pygame.image.fromstring(data, (width, height), 'RGB', 1) > pygame.image.save(surface, filename) > > data = readScreen(0,0, screen.get_width(), screen.get_height()) > saveImageData(screen.get_width(), screen.get_height(), data, filename) > > > > > > On Wed, May 7, 2008 at 2:27 PM, René Dudfield <[EMAIL PROTECTED]> wrote: > > hi, > > > > glReadPixels, make a surface, then use pygame.image.save() > > > > Then use ffmpeg, or vlc etc to make a movie out of still frames. > > > > cheers, > > >
BUG: pygame.image.save(screen) with pyopengl 3.x Re: [pygame] PyOpenGL Screenshots
Added a bug to the subject. cu, On Wed, May 7, 2008 at 2:44 PM, René Dudfield <[EMAIL PROTECTED]> wrote: > looks like pyopengl 3.x returns a numpy array now instead of a string > by default... which breaks pygame.image.save on gl with pyopengl 3.x. > > Here's a work around screenshot function for gl. > > > def save_screen(screen, filename): > > def readScreen(x, y, width, height): > """ Read in the screen information in the area specified """ > glFinish() > glPixelStorei(GL_PACK_ALIGNMENT, 4) > glPixelStorei(GL_PACK_ROW_LENGTH, 0) > glPixelStorei(GL_PACK_SKIP_ROWS, 0) > glPixelStorei(GL_PACK_SKIP_PIXELS, 0) > > data = glReadPixels(x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE) > if hasattr(data, "tostring"): > data = data.tostring() > > return data > def saveImageData(width, height, data, filename): > """ Save image data """ > surface = pygame.image.fromstring(data, (width, height), 'RGB', 1) > pygame.image.save(surface, filename) > > data = readScreen(0,0, screen.get_width(), screen.get_height()) > saveImageData(screen.get_width(), screen.get_height(), data, filename) > > > > > > On Wed, May 7, 2008 at 2:27 PM, René Dudfield <[EMAIL PROTECTED]> wrote: > > hi, > > > > glReadPixels, make a surface, then use pygame.image.save() > > > > Then use ffmpeg, or vlc etc to make a movie out of still frames. > > > > cheers, > > >
Re: [pygame] PyOpenGL Screenshots
looks like pyopengl 3.x returns a numpy array now instead of a string by default... which breaks pygame.image.save on gl with pyopengl 3.x. Here's a work around screenshot function for gl. def save_screen(screen, filename): def readScreen(x, y, width, height): """ Read in the screen information in the area specified """ glFinish() glPixelStorei(GL_PACK_ALIGNMENT, 4) glPixelStorei(GL_PACK_ROW_LENGTH, 0) glPixelStorei(GL_PACK_SKIP_ROWS, 0) glPixelStorei(GL_PACK_SKIP_PIXELS, 0) data = glReadPixels(x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE) if hasattr(data, "tostring"): data = data.tostring() return data def saveImageData(width, height, data, filename): """ Save image data """ surface = pygame.image.fromstring(data, (width, height), 'RGB', 1) pygame.image.save(surface, filename) data = readScreen(0,0, screen.get_width(), screen.get_height()) saveImageData(screen.get_width(), screen.get_height(), data, filename) On Wed, May 7, 2008 at 2:27 PM, René Dudfield <[EMAIL PROTECTED]> wrote: > hi, > > glReadPixels, make a surface, then use pygame.image.save() > > Then use ffmpeg, or vlc etc to make a movie out of still frames. > > cheers, >
Re: [pygame] PyOpenGL Screenshots
hi, glReadPixels, make a surface, then use pygame.image.save() Then use ffmpeg, or vlc etc to make a movie out of still frames. cheers,
Re: [pygame] PyOpenGL Screenshots
Ian Mallett wrote: Hello, -I have a project which must be finished by Thursday. The project is a movie, for a presentation, and my solution has been to make a program to render each frame in OpenGL. I can now render each frame individually, but now I face the challenge of turning these renders into a movie. (Movie capture programs are no good--free ones have drawbacks, and in any case the renders are slow to update (think 1 fps tops).). -I decided to do it as a .gif animation, as I have several programs for making movies from a series of images Using an animated gif would be dumb. http://www.yourmachines.org/tutorials/mgpy.html shows how to use ffmpeg to create video files from images. --Noah signature.asc Description: OpenPGP digital signature
[pygame] PyOpenGL Screenshots
Hello, -I have a project which must be finished by Thursday. The project is a movie, for a presentation, and my solution has been to make a program to render each frame in OpenGL. I can now render each frame individually, but now I face the challenge of turning these renders into a movie. (Movie capture programs are no good--free ones have drawbacks, and in any case the renders are slow to update (think 1 fps tops).). -I decided to do it as a .gif animation, as I have several programs for making movies from a series of images. -The obvious thing to do is to copy each frame into the programs, building my movie that way. -However, there are exactly 1200 frames in the movie at a minimal quality--that's (150 frames/scene)*(8 scenes). I want this framerate to be higher. This pushes the frame count higher, naturally. The stupendous number of necessary frames is impractical to copy via ALT-PRINTSCREEN--(my current method). -The ideal solution is to directly export the frames into a .gif animation. -My second best option would be to save each render in a separate file. I could then drag and drop these renders chunks at a time into my program to make the animation. -I face several challenges here. The most important is that I have no idea how to save screenshots from PyOpenGL. Last I heard, people sort-of had ideas about how to do it. pygame.image.save() *does not work* on OpenGL surfaces. Any concrete working examples here? -Summary: From an PyOpenGL program, what is a working method of saving renders to either many files or directly to a .gif animation? Thanks, Ian
