[gst-devel] guidelines for creating new type/flow

Terry Leung terry83 at gmail.com
Tue Sep 25 15:35:32 CEST 2007

Hi Pete ,

I recommend you to start with the time overlay element
I do think that it is really close to what you want except that it
display time instead of a string

On 9/25/07, Pete Nam <devpersoaccount at yahoo.com> wrote:
> Hi,
> I'm using gstreamer to display information overlayed on a video (mainly
> text). I'll use existing plugins for the overlay, but I need to create my
> own flow type getting out of a home-made plugin. This plugin would take the
> video on sink pad, analyze it, and send information (per frame) on the
> source pad. There is very limited information in the gstreamer main and
> plugin guides about this.
> My concerns are:
> -what kind of plugin should I create (I currently start from the skeleton
> plugin generated from plugin tools, and specify my own caps for sink/source
> pads)
> -how do I create a new type
> -what are the main things to implement this new stream. As it is, I have to
> create a buffer, specify its duration, timestamp, size, what else? How to
> relate to caps properties?
> I would appreciate some guidelines and/or examples,
> Thx,
> Pete
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