gstreamer capture examples for demo

I need some help to do gstreamer demo - It is really urgent and need to be done asap. The demo is on wednesday so you need to deliver soon. I have not used gstreamer before so I need someone that helps me giving me the commands in scripts to do the following on ubuntu. My setup is 2 webcams connected to a pc with ubuntu via usb and gstreamer 1.0 1. capture video from 2 webcams at the same time and writing it in two separated files (i need to be able to change fps and video size, video format, and define capture lenght in seconds). 2. capture images from 2 webcams at the same time and writing them to two files (i need to be able to set up size and format) 3. capture video from 2 webcams at the same time and writing it in one file in a topdown (over under) format (i need to be able to change fps and video size, and define capture lenght in seconds). 4. capture images from 2 webcams at the same time and writing them to one file n a topdown (over under) format (i need to be able to set up size and format) 5. stream 1 video file (i need to be able to set up size and format) 6. stream 1 live camera (i need to be able to set up size and format) 7. stream 2 video files at the same time (in sync, start at the same time) (i need to be able to set up size and format) 8. stream 2 live cameras at the same time (in sync, start at the same time) (i need to be able to set up size and format) 9. stream and capture 1 video at the same time 10. stream and capture 2 videos at the same time I do not know if all the things that I want to do are possible. Please bid and tell me what you can do to help.