What is use of clipBegin and clipEnd? - SMIL

What is use of clipBegin and clipEnd?

- Internal timing marks to playback begin and end is specified by clipBegin and clipEnd attributes of a clip.

- These attributes allows to play a part of a clip which has an internal timeline, like video/audio.

- Static or group clips will not be effected by clipBegin and clipEnd attributes.

- Following is an example :

<video src="myvideo.rm" clipBegin="10s" clipEnd="50s"/>

- In the above example, the clip starts playing at 10 second mark and ends when it reaches 50 seconds. The total play is for 40 seconds.