Le mercredi 5 décembre 2007 23:17, xfingerfox32 a écrit :
There are a mistake in some Vimicro/Zstar chipset webcam firmware, manufactured by Logitech/Labtec . The last macroblock line from the jpeg stream is not available in QVGA. The spca5xx_LE driver have nothing todo with that. Who knows how windoze can give you a 320x240 stream ;-) from my snoops the mjpeg stream is the same as in Linux.!! > A bit more information about the exposure time, i have tested on high > light condition for both linux and xp, and i have the same result, > both give grey images from the begining, good whole `grey` images. > tested with 640x480 Good, the chipset (vc0301/vc0302/zc0301p/zc0302) is the same an adjust the exposure times, no-one can access the sensor directly. exept to freeze the webcam firmware. As far as i know only max/min value can be set to the zc030x registers (but without documentation... it is your risk) > > Depending on the size of the image (small), the bottom most part of > the image is corrupt on linux (not the foxboard). About 5% > > This test were made on XP, Fedora 7 64 bits, foxboard k2.4 SDK 2.01 > > --- In [email protected], "xfingerfox32" <[EMAIL PROTECTED]> wrote: > > Hello, > > > > I have a LabTec Pro with foxboard running for a long period without > > this major problems. > > > > LabTec Pro is auto exposure webcam, so it should not be a problem > > to > > > run in a dark room (in fact it works well with low light condition) > > > > I dont have a LUX meter, and i have not tested it with extreme > > light > > > condition, but as far as i went with low light condition (totally > > dark) it works fine. > > > > Note that foxserve and its parent spca server (X86 and the 64Bits) > > run into a racing condition after 5 min if you have 2 clients > > conected to the server and the server stops sending images to the > > clients, but that seems not the case. It is solved by using mutex > > instead of while() and increasing number of grab frames. > > > > JWebcamPlayer is another problem, it cant keep a conection for a > > long > > > time, no matter if it is from foxserve or spca server, in fact the > > connection is not broken, it is just that the server can not read > > from JWebcamPlayer at some moment and foxserve stops sending new > > images to JWebcamPlayer wainting from JWebcamPlayer to ask another > > frame. A Java programmer or the auhor could help solve this, my > > java > > > skills are 0.1%. > > > > so my best advice is: USE KERNEL 2.4!!!!! > > > > Hope this helps. > > > > Best Regards, > > Alexander > > > > > > > > --- In [email protected], "Michele Costantino" <smile_k@> > > > > wrote: > > > I've got the SAME exact problem... dunno why, but if if put the > > > > webcam > > > > > facing another part of my room,the problem disappear(previously > > it > > > was > > > > > pointing a calendar of a beautyful girl...the webcam doesn't like > > > her....ihihihih). > > > Try moving the webcam,i've solved :) > > > > > > > > > _____ > > > > > > Da: [email protected] [mailto:[EMAIL PROTECTED] > > Per > > > conto di > > > > > sjanadt > > > Inviato: martedì 4 dicembre 2007 16.06 > > > A: [email protected] > > > Oggetto: [foxboard] webcam, broken images > > > > > > > > > > > > I've got a Labtec webcam pro working well with the foxboard. > > > (FOXLX832, Kernel 2.6.15) All fine so far. > > > > > > At times unfortunately, damaged images are produced. In these > > > situations the images shown by the servfox application in > > > > combination > > > > > with JWebcamPlayer, are partially ok and the rest of the image is > > > uniformly grey. > > > I don't know what causes this behavior. But if I found such a > > > situation, it's repeatable and I can't get a correct image at all. > > > > > > Anyone else had this problem? Any ideas, how to fix this? > > > > > > Thanks in advance > > > > > > jan > > Yahoo! Groups Links > > > -- Michel Xhaard http://mxhaard.free.fr
