Does gst-launch can not work with appsrc?

[hcpwll]

Dears,
      I followed the example and it working well.
         https://gist.github.com/725122/16ceee88aafae389bab207818e0661328921e1ab
      But, How can I use gst-launch to do this?
      In my opinon gst-launch can not working with appsrc,
      Because I can not give a "feed-data" callback to gst-launch, So the appsrc could not get any data. Right?
Thank you!
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