ios - OpenGL format texture -

i trying display video on screen using opengl es 2 on ios.

i sum bit doing playback , display video on screen :

first have .mov file recorded using gpuimagemoviewriter object. when recording completed going playback video using avplayer. therefore set avplayeritemvideooutput able retrieve frame video :

nsdictionary *test = [nsdictionary dictionarywithobject: [nsnumber  numberwithint:kcvpixelformattype_32bgra] forkey: (id)kcvpixelbufferpixelformattypekey];         self.videooutput = [[avplayeritemvideooutput alloc] initwithpixelbufferattributes:test]; 

i use copypixelbufferforitemtime function avplayeritemvideooutput , receive cvimagebufferref corresponding frame of initial video @ specific time.

finally, here function created create opengl texture buffer :

- (void)setuptexturefrombuffer:(cvimagebufferref)imagebuffer {    cvpixelbufferlockbaseaddress(imagebuffer, 0);    int bufferheight = cvpixelbuffergetheight(imagebuffer);   int bufferwidth = cvpixelbuffergetwidth(imagebuffer);    cvpixelbuffergetpixelformattype(imagebuffer);   glbindtexture(gl_texture_2d, m_videotexture);    glteximage2d(gl_texture_2d, 0, gl_rgba, bufferwidth, bufferheight, 0, gl_rgba,    gl_unsigned_byte, cvpixelbuffergetbaseaddress(imagebuffer));    cvpixelbufferunlockbaseaddress(imagebuffer, 0); } 

by doing (and using non related algorithms augmented reality things) got strange result if video has been put in slices(i can't show because don't have enough reputation so).

it looks data not interpreted opengl (wrong format ? type ?)

i checked whether corrupted buffer error using function :

- (void)saveimage:(cvpixelbufferref)pixbuffer {     ciimage *ciimage = [ciimage imagewithcvpixelbuffer:pixbuffer];      cicontext *temporarycontext = [cicontext contextwithoptions:nil];     cgimageref videoimage = [temporarycontext                              createcgimage:ciimage                              fromrect:cgrectmake(0, 0,                                                  cvpixelbuffergetwidth(pixbuffer),                                                  cvpixelbuffergetheight(pixbuffer))];      uiimage *uiimage = [uiimage imagewithcgimage:videoimage];      uiimagewritetosavedphotosalbum(uiimage, self, @selector(image:didfinishsavingwitherror:contextinfo:), nil);  }     

-> saved image appeared in photo album.

it may come .mov file can check if there's wrong file ?

thanks lot help, i'm stuck on problem hours/days !

you need use kcvpixelformattype_420ypcbcr8biplanarvideorange.

then transfer them separate chroma , luma opengles textures. example @ https://developer.apple.com/library/ios/samplecode/avbasicvideooutput/listings/avbasicvideooutput_apleaglview_m.html

i tried using several rgb based options not make work.