This string: 'video/x-raw-yuv,width=640,height=480,framerate=30/1' <div class="gmail_quote">is a capabilities string (caps). You can change the width and height there to whatever the camera supports. call gst-inspect v4l2src to set what options you have. Same for ffenc_flv. Call gst-inspect ffenc_flv to see what properties you can set when calling gst-launch. You can try to change minimal quntaizer values. Squares are coming because of aliasing, thus changing the quantization parameter might help. 2010/5/26 Yuval Yohai <<a href="mailto:yuval@lab-tunes.com">yuval@lab-tunes.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hello all, I am very new to Gstreamer. I need to stream a video source from a firewire HD camera to a remote site using cellular modem. The picture quality should be as good as possible. Its size, though, could be around 640X480 or a little bigger (or wider). As of now I am doing my first steps using my web cam. I do this: gst-launch-0.10 -v v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480,framerate=30/1' ! ffenc_flv ! udpsink port=5000 My output video picture is very low in quality. It seem as if the encoding is very rough (picture has small squares on it). If I do: gst-launch-0.10 -v v4l2src device=/dev/video0 ! ffenc_flv ! udpsink port=5000 I get a 1600 X 1400 picture but then I don't know how to resize it to a smaller format. Any suggestions? Am I on the right track? Thanks, Yuval Yohai -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/How-do-I-optimize-my-encoding-and-streaming-tp2231076p2231076.html" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/How-do-I-optimize-my-encoding-and-streaming-tp2231076p2231076.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: <a href="http://p.sf.net/sfu/thinkgeek-promo" target="_blank">http://p.sf.net/sfu/thinkgeek-promo</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div> -- Your Sincerely Michael Joachimiak