Hi Markus, On April 25, Markus Schwab wrote: > We use the Zoran Corporation ZR36057PQC Video cutting chipset to > capture > simultaneously compressed and uncompressed videos (after patching the > kernel, to allow multiple opens on video devices). This works fine in > the 2.4'er kernel series.
Using the same applicaton or different applications? If same, using the same or different file descriptors? > So my question is, if there is a solution for both capturing > compressed > and uncompressed videos simultaneously? Not really supported, although it should work, _if_ from different fds or different apps. From the same fd/app, it cannot work, b/c you share the same memory segment in the mmap() call. This cannot possibly work. Essentially, you're capturing JPEG and raw frames in the same buffer. this is awfully wrong. I think there's protections in the kernel to make sure this never happens. It shouldn't hang, though, it should error out... > Is it supported at all or just good luck that it works with kernel > 2.4? Pure luck, in 2.4 at least. The fact that kernel patching was required should say enough. 2.6 protects from this happening. Ronald ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
