Your MLT file is improperly terminated. It ends:
<transition id="transition10">
<property name="a_track">0</property>
<property name="b_track">2</property>
<property name="mlt_service">mix</property>
<property name="always_active">1</property>
<property name="sum">1</property>
</transition>
<transition id="transition11">
<property name="a_track">1</property>
<property name="b_track">2</property>
<property
If you do not have a backup copy you can use then try the edited version that I created by removing the incomplete “transition11” and adding the terminating tags:
</tractor>
</mlt>
scene4new_EDITED.mlt (258.7 KB)
Of course you will be missing some of the work you did on the project, but at least all is not completely lost. You can view the MLT file in a simple text editor like Notepad, or Notepad++.
For future reference please read this thread: