[yesea]

dear all ,
I wish i post my question on right positon .
I ues one mpeg decoder (maybe ffmpeg) to decoder mpeg video stream file. The decoder's output is yuv buffer frame data ..Now i want to display this frame .
First i create one yuv pixmap use API ::QTNewGWorld(&gw , kYUVSPixelFormat , &r ,nil,nil ,0 ) ; And dump the buffer data to this pixmap .then use API ::CopyBits() to show
it in one port . But it's not ok .nothing will be display in the port ..While . maybe i can convert the yuv data to rgb data .then use pixmap the pixel format is kRGB.... it will be ok .
But . it is so slow ..
And , i consider that i 'll take some idea in QT component . Any suggest will be thanks!!!
--Ann

[Samad]

Dumping a YUV buffer into the frame buffer will give you a jumbled buffer, because it expects an RGBA buffer. I'm pretty sure QuickTime does not support YUV channels, although I'm not certain. YUV is specfically for television, not computer media. Computer video software seldom support YUV channels unless it is designed for output video to be displayed on a television screen. In order to use this buffer, you'll first have to convert each YUV pixel into an RGB pixel, then pad the RGB pixel with 4 bytes for the alpha channel.

[yesea]

First thanks for you reply .
I convert YUV frame data to ARGB it's ok .But the performance is less .