Hi Hans, On Friday 13 February 2009 13:57:45 Hans Verkuil wrote: > Hi Hans, > > I've developed a converter for the HM12 format (produced by Conexant MPEG > encoders as used in the ivtv and cx18 drivers). > > But libv4l2 has a problem in its implementation of v4l2_read: it assumes > that the driver can always do streaming. However, that is not the case > for some drivers, including cx18 and ivtv. These drivers only implement > read() functionality and no streaming. > > Can you as a minimum modify libv4l2 so that it will check for this case? > The best solution would be that libv4l2 can read HM12 from the driver and > convert it on the fly. But currently it tries to convert HM12 by starting > to stream, and that produces an error. > > This bug needs to be fixed first before I can contribute my HM12 > converter. My sincere apologies: I looked at the libv4l2 code again and it was clear that it did in fact test for this case. I retested my own code and everything seems to work as it should. So libv4l2 is fine, and I will prepare a tree tomorrow containing the hm12 support for libv4lconvert. Sorry about this, Hans -- Hans Verkuil - video4linux developer - sponsored by TANDBERG -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
