Playing video | GameDev.net

glmisscelan · 2007-10-30T05:31:41+00:00

Hi, I want to load some video movies on my game, im using gl with sdl, actually im using smpeg because i want it working on linux and windows. But im getting some problems with it on windows. Besides, with this you can only use MPEG-1 and that cause me several headaches. The movies are made originally on flash. So, anyone know any multiplatform library that allow me to play video or any cool way to put some flashs movies …

First up; NO, this code isn't cross-platform compatible. Its a shame, but its just how it is.

This code snippet uses gstreamer to play any type of video that gstreamer can. I suggest you install the ffmpeg plugin for maximum benefit.

It uses two variable, vidHeight and vidWidth to specify the size of the video, which you will need to find and change to suit your source file. Using gstreamer to find these details is outside the scope of this code

And its in python, but the libraries are available in C++. Pygame is a wrapper for SDL, pyOpenGL is a wrapper for...

#!/usr/bin/pythonimport osimport sysimport gobjectgobject.threads_init()import gstimport pygameimport OpenGL.GLimport OpenGL.GLUvidSource = blah.format #Needs to be relative to the current directoryvidWidth = 100 #You will need to change this.vidHeight = 100 #You will also need to change thisclass videoPlayer():    def __init__(self, (windowWidth, windowHeight)):        self.updated = False        pygame.init()        flags = pygame.DOUBLEBUF|pygame.OPENGL        pygame.display.set_mode((windowWidth,windowHeight), flags)        OpenGL.GL.glEnable(OpenGL.GL.GL_TEXTURE_2D)        OpenGL.GL.glClearColor(0.0, 0.0, 0.0, 0.0)        OpenGL.GL.glClearDepth(1.0)        #Setup the lighting        OpenGL.GL.glLightfv( OpenGL.GL.GL_LIGHT1, OpenGL.GL.GL_AMBIENT,                              (0.5, 0.5, 0.5, 1.0) )        OpenGL.GL.glLightfv( OpenGL.GL.GL_LIGHT1, OpenGL.GL.GL_DIFFUSE,                               (1.0, 1.0, 1.0, 1.0) )        OpenGL.GL.glLightfv( OpenGL.GL.GL_LIGHT1, OpenGL.GL.GL_POSITION,                               (0.0, 0.0, 2.0, 1.0) )        OpenGL.GL.glEnable( OpenGL.GL.GL_LIGHT1 )        OpenGL.GL.glViewport(0, 0, self.width, self.height)        OpenGL.GL.glMatrixMode(OpenGL.GL.GL_PROJECTION)        OpenGL.GL.glLoadIdentity()        OpenGL.GLU.gluPerspective(60.0, float(windowWidth)/float(, 1, 1000.0)        OpenGL.GL.glMatrixMode(OpenGL.GL.GL_MODELVIEW)        OpenGL.GL.glLoadIdentity()    def textureSetup(self, vidHeight, vidWidth):        self.vidHeight = vidHeight        self.vidWidth = vidWidth        blankSurface = pygame.Surface((self.srcWidth, self.srcHeight),                                             pygame.HWSURFACE, 24)        blankSurface.fill((0,0,0))        self.textureNo = OpenGL.GL.glGenTextures(1)        surfaceData = pygame.image.tostring(blankSurface, "RGB", True)        self.buffah = surfaceData        OpenGL.GL.glBindTexture(OpenGL.GL.GL_TEXTURE_2D, self.textureNo)        OpenGL.GLU.gluBuild2DMipmaps(OpenGL.GL.GL_TEXTURE_2D, OpenGL.GL.GL_RGB,               vidWidth, vidHeight, OpenGL.GL.GL_RGB,               OpenGL.GL.GL_UNSIGNED_BYTE, surfaceData)        OpenGL.GL.glTexParameteri(OpenGL.GL.GL_TEXTURE_2D,                           OpenGL.GL.GL_TEXTURE_MAG_FILTER, OpenGL.GL.GL_LINEAR)        OpenGL.GL.glTexParameteri(OpenGL.GL.GL_TEXTURE_2D,                          OpenGL.GL.GL_TEXTURE_MIN_FILTER, OpenGL.GL.GL_LINEAR)        self.listNo = OpenGL.GL.glGenLists(1)        OpenGL.GL.glNewList(self.listNo, OpenGL.GL.GL_COMPILE)        OpenGL.GL.glBegin(OpenGL.GL.GL_QUADS)        OpenGL.GL.glNormal3f(0.0, 0.0, 1.0)        OpenGL.GL.glTexCoord2f(0.0, 1.0); OpenGL.GL.glVertex3f(-400, -300, -0)        OpenGL.GL.glTexCoord2f(1.0, 1.0); OpenGL.GL.glVertex3f( 400, -300, -0)        OpenGL.GL.glTexCoord2f(1.0, 0.0); OpenGL.GL.glVertex3f( 400,  300, -0)        OpenGL.GL.glTexCoord2f(0.0, 0.0); OpenGL.GL.glVertex3f(-400,  300, -0)        OpenGL.GL.glEnd()        OpenGL.GL.glEndList()    def vidSetup(self, vidSource):        #Setup Gstreamer        s = ''' filesrc name=input             ! decodebin name=dbin             ! queue name =q             ! ffmpegcolorspace ! video/x-raw-rgb             ! fakesink name=output signal-handoffs=true sync=true               dbin. ! queue             ! audioconvert ! audiorate ! alsasink             '''        self.myPipeline = gst.parse_launch(s)        self.myInput  = myPipeline.get_by_name('input')        self.myFakeSink = myPipeline.get_by_name('output')        self.myInput.set_property("location", os.getcwd() + '/' + vidSource)        self.myFakeSink.connect ("handoff", self.texUpdate)        self.myPipeline.set_state(gst.STATE_PLAYING)     def texUpdate(self, sink, buffer, pad):        self.buffah = buffer        self.updated = True    def play(self):        while True:            if self.updated:                surfaceData = self.buffah                OpenGL.GL.glBindTexture(OpenGL.GL.GL_TEXTURE_2D, self.textureNo)                OpenGL.GLU.gluBuild2DMipmaps(OpenGL.GL.GL_TEXTURE_2D,                               OpenGL.GL.GL_RGB, self.vidWidth, self.vidHeight,                               OpenGL.GL.GL_RGB, OpenGL.GL.GL_UNSIGNED_BYTE,                               surfaceData)                OpenGL.GL.glTexParameteri(OpenGL.GL.GL_TEXTURE_2D,                         OpenGL.GL.GL_TEXTURE_MAG_FILTER, OpenGL.GL.GL_LINEAR)                OpenGL.GL.glTexParameteri(OpenGL.GL.GL_TEXTURE_2D,                         OpenGL.GL.GL_TEXTURE_MIN_FILTER, OpenGL.GL.GL_LINEAR)                OpenGL.GL.glCallList(self.listNo)                self.updated = False            else:                OpenGL.GL.glBindTexture(OpenGL.GL.GL_TEXTURE_2D, self.textureNo)                OpenGL.GL.glCallList(self.listNo)myVideoPlayer = videoPlayer((800,600))myVideoPlayer.textureSetup(vidHeight, vidWidth)myVideoPlayer.vidSetup(vidSource)myVideoPlayer.play()

NOTE: I didn't get a chance to test this code, I might need to post an working update later, but this should give you the general idea of how to acheive the playback in linux.

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