2013-03-25 03:02:15 -0600 | received badge | ● Student (source) |
2013-03-24 02:00:32 -0600 | asked a question | Possible to load a RGBA avi file with cvCaptureFromAVI ? Hello, I have been trying to load an avi file with RGBA using the cvCaptureFromAVI function, but each time it loses the alpha channel. It is a valid 8bit depth RGBA avi file (with a real value in alpha), but whenever I use cvQueryFrame the channels are reported as 3, and also the widthstep shows it to be only 3 bytes data (i.e. RGB). I have tried it with various codecs (huffyuv, lagraith, etc), and it decodes and plays perfectly, except that the alpha is lost. Now I know that the LoadImage functionality in opencv does not support loading RGBA - but is it the same in cvCaptureFromAVI? I only need to know 'in principle' if it can load RGBA, and I will continue to work it out - otherwise I need to know if I am chasing a dead duck. Thanks |