[LAD] Python Gstreamer Live Video examples

I'm just getting started with some python gstreamer coding, and Having trouble finding what I'd consider some basic examples: These I've already got working: 1. build a pipeline showing the attached video device like: gst-launch v4l2src device=/dev/video0 ! 'video/x-raw-yuv,format=(fourcc)YUY2,width=640,height=480,framerate=20/1' ! xvimagesink 2. Record and show video at the same time: gst-launch v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480,framerate=20/1' ! tee name=t_vid ! queue ! xvimagesink sync=false t_vid. ! queue ! videorate ! 'video/x-raw-yuv,framerate=20/1' ! theoraenc ! queue ! oggmux ! filesink location=test.ogg I want to get working: 3. toggle recording, so I can show a video monitor, and without destroying and recreating the pipeline start or stop video recording at will. 4. Sync multiple pipelines, my end goal is to be able to record x video streams in sync, while playing back y videos with all play and record sources in sync (think video mixing). I'm looking for examples of 3 and 4, and improvement ideas to 1 and 2. Thanks, Nathanael