Hello,
You could check here for examples:
http://processors.wiki.ti.com/index.php/Example_GStreamer_Pipelines
v4l2src (Capture) example:
gst-launch -v v4l2src always-copy=FALSE num-buffers=2000 ! TIVidenc1 codecName=mpeg4enc engineName=codecServer contiguousInputFrame=TRUE ! filesink location=output.m4v
Could you provide more detail about the video source as format and etc?
Best Regards,
Margarita