>On Thu, 20 Jan 2005, Steven Boswell II wrote: >> OK, I'm pretty sure I understand this. But >> wouldn't I have to have 4:4:4 data (i.e. 720x480 >> chroma data to go along with my 720x480 intensity > >You only need 4:2:2 or 4:1:1, something that isn't subsampled >vertically. 1:2 or 1:4 horizontal subsampling is ok. BTW, the >zoran mjpeg cards produce 4:2:2 and DV is 4:1:1...
Zoran MJPEG cards do produce 4:2:2, but lav2yuv always does a quick-n-dirty downsampling to 4:2:0. (If someone who uses MJPEG would like to change that, well, the YUV4MPEG2 format now supports both 4:2:2 and 4:4:4. smil2yuv fixes that 'overzealous resampling' problem for DV streams.) -matt m. ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
