How to encode a partial video by using "encodebin"?

[Victor]

> Do you mean partial videos, like in video edition ? If so, you might
> want to look at another API, GStreamer Edition Services, also known as
> GES. If it still not a fit for you, GStreamer is the only thing that
> handles this, you could look at FFMPEG based MLT library.
> 
> Nicolas

Thanks, Nicolas. I'm learning GES now, but have difficulty to find on-line tutorials.
The example I'm learning from is gstreamer-editing-services-1.14.2/examples/c/simple1.c,
but it obviously has resource leaks. Sorry I digressed. Thanks again, really appreciate it.