[chinakid]

hi All ,
I want to encoder a AVI file to MPEG file . So befor encode every frame i need convert the RGB data to YUV data for every frame .Now i find convert RGB to YUV is much slow . I try do it by two way .
(1) .. use QuickTime playback ( Carbon API : MoviesTask () ) , Get the movie GWorld , then get the Pixmap RGB Data .
(2) .. use QuickTime API GetMoviePict . get the PicHandle , convert the PicHandle to GWorld ,then get the Pixmap RGB Data ..
Is there any method for relizing RGB to YUV in QT quickly ?? Thanks for your help !

ann

[audiffred]

Yes, there is an easy way. Use apple's image compression tools. You will want to setup two gworlds with different pixel formats and decrompress from one into the other. Looks up functions like DecompressImage, DecompressSequenceBeginS, and DecompressFrameWhen.

[chinakid]

hi
okay . I'll try it after my holidays . later ,i'll come here and post my result . Great thanks for audiffred .

ann