Comment 104 for bug 520941

If you export the melt XML using the example project I posted. You see the following:-

<producer id="65ba0cac-b54d-11e1-b013-00261898a8a2" in="0" length="15000" novdpau="1" out="-1">
 <property name="resource">/home/daniel/Openshot bug 520941/thumbnail/Short Clip.svg</property>
</producer>

Note the value "-1" set in the out attribute. I would suspect that we never want to specify -1 for this attribute, clearly the behaviour is undefined. What would be a good solution to this?

Prevent the user from adding such a short clip?
Silently set this value to 0, to prevent an invalid value being used?
Warn the user that the clip is too short?

Currently it can be difficult to notice if you have accidently shortend a clip, especially if it is at the beggining of the track, or close to another clip.