When I use Logitech web camera and Intel H.264 encoder and decoder in graphedit. Graphedit automatically add color space convert and the output frame like frozen, moving to next frame after 2 or 3 seconds.
After I change to a analog camera, graphedit don't add extra filter between input source and encoder filter and the output frame looks normal. The only problem is the analog output frame looks like interlaced. If I try to add a deinterlace filter between input and encoder filter, the output frame acts just like the web camera.