Hi Edgard, Wish you a very happy & prosperous new year 2007. Thanks for your reply. It is very helpful to me. I used GstColorBalance APIs to change the brightness/contrast setting as you suggested and saw some improvement in picture quality. I need to find out the proper values of hue/saturation/brightness/contrast to get the best picture quality out of this webcam. Once again, thank you very much for your input. Regards, Sanjay On Thu, 28 Dec 2006 Edgard Lima wrote : > >Hi, > >first of all try to see the image you are capturing > >v4lsrc ! xvimagesink (try also v4l2src ! xvimagesink) > >then try some capabilities > >v4lsrc ! video/x-raw-yuv,framerate=12/1 ! xvimagesink > >if you get some errors look the log messages to get a hint of others framerates > >then, if the image is too dark or whatelse bad > >write an app and use GstColorBalance interface to modify some parameters like brightness and contrast >(look into http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/tests/icles/v4l2src-test.c?revision=1.8&view=markup to see how to write such app) > >in addition you could also use a queue element between v4lsrc and theoraenc > >BR, >Edgard > > >ext sanjay kumar gupta escreveu: >> >>Hi, >>I  have logitech quickcam express webcam. Recorded video quality from this web cam is very bad. >>These are the details in my system: >>$ uname -a >>Linux localhost.localdomain 2.6.16.20 #1 SMP Tue Dec 19 10:59:29 IST 2006 i686 i686 i386 GNU/Linux >>$ /sbin/lsmod |grep video >>video                  18820  0 >>videodev              13440  1 spca5xx >> >>I am using the following command to record the video: >> >>$ gst-launch-0.10 v4lsrc  ! videoscale ! 'video/x-raw-yuv,frame-rate=(double)12.0' ! ffmpegcolorspace ! theoraenc ! oggmux ! filesink location=abc.ogg >> >>I tried with different frame rates, width, height combination in the filter in command line but got same quality video. >>Can someone please tell me how to get better video quality from this webcam using gstreamer? >>Attaching the recorded video sample file. >>Thanks in advance. >>Regards,Sanjay >> >> >> >><http://adworks.rediff.com/cgi-bin/AdWorks/sigclick.cgi/www.rediff.com/signature-home.htm/1507191490@Middle5?PARTNER=3> >>------------------------------------------------------------------------ >> >>------------------------------------------------------------------------- >>Take Surveys. Earn Cash. Influence the Future of IT >>Join SourceForge.net's Techsay panel and you'll get the chance to share your >>opinions on IT & business topics through brief surveys - and earn cash >>http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >>------------------------------------------------------------------------ >> >>_______________________________________________ >>gstreamer-devel mailing list >>gstreamer-devel@lists.sourceforge.net >>https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > <a href="http://adworks.rediff.com/cgi-bin/AdWorks/sigclick.cgi/www.rediff.com/signature-home.htm/1507191490@Middle5?PARTNER=3"><IMG SRC="http://adworks.rediff.com/cgi-bin/AdWorks/sigimpress.cgi/www.rediff.com/signature-home.htm/1963059423@Middle5?OAS_query=null&PARTNER=3" BORDER=0 VSPACE=0 HSPACE=0></a>