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I need to place a marker at 00:01:05:00 (FCPX 10.4, XML v1.7), which
happens to coincide with the placement of a transition on the timeline.
When my app adds the marker to the XML at 65 seconds it never appears on
the timeline nor in the Index pane.
I added the marker manually in FCPX and then exported XML to see what FCPX
was expecting and was confused by the result. (I have bolded the marker I
added manually.)
-----------
<sync-clip name="MVI_4454.MP4"
offset="1689688/30000s" duration="262262/30000s" start="4360356/30000s">
<spine>
<gap name="Gap" offset="0s"
duration="143143/1200s" start="3600s"/>
<clip name="MVI_4454.MP4"
offset="143143/1200s" duration="2080078/30000s">
<video offset="0s" ref="r29"
duration="2080078/30000s"/>
<asset-clip name="ZOOM0003.WAV"
lane="-1" offset="-3578575/30000s" ref="r27" duration="649649/1875s"
start="26238212/30000s" audioRole="dialogue" format="r3"/>
</clip>
<gap name="Gap" offset="5658653/30000s"
duration="1578577/10000s" start="3600s"/>
</spine>
</sync-clip>
<transition name="Cross Dissolve"
offset="1931930/30000s" duration="39039/30000s">
<filter-video ref="r5" name="Cross Dissolve">
<param name="Look" key="1" value="11
(Video)"/>
<param name="Amount" key="2" value="50"/>
<param name="Ease" key="50" value="2 (In
& Out)"/>
<param name="Ease Amount" key="51"
value="0"/>
</filter-video>
<filter-audio ref="r6" name="Audio Crossfade"/>
* <marker start="5401001/1500s"
duration="1001/30000s" value="transition marker test"/>*
</transition>
<sync-clip name="MVI_4454.MP4"
offset="1951950/30000s" duration="296296/30000s" start="4973969/30000s">
<spine>
<gap name="Gap" offset="0s"
duration="143143/1200s" start="3600s"/>
<clip name="MVI_4454.MP4"
offset="143143/1200s" duration="2080078/30000s">
<video offset="0s" ref="r29"
duration="2080078/30000s"/>
<asset-clip name="ZOOM0003.WAV"
lane="-1" offset="-3578575/30000s" ref="r27" duration="649649/1875s"
start="26238212/30000s" audioRole="dialogue" format="r3"/>
</clip>
<gap name="Gap" offset="5658653/30000s"
duration="1578577/10000s" start="3600s"/>
</spine>
</sync-clip>
-----------
The part I'm confused about is why the marker start point is 3600 seconds
when the sync clip is less than 6 minutes in length. FCPX adds a gap
element to the sync clip to make up for the fact that the audio is longer
than the video and the gap start time is 3600 seconds for some reason. But
considering that the gap part of the sync clip isn't used in the timeline,
why does FCPX expect the marker to be relative to that start point?
Also, if I add markers directly to a sync clip, I don't have to make them
relative to the timing of any of the clips in the spine, so why must I take
this into account only when adding them to a transition?
Regards,
Jon Chappell.
CEO, Digital Rebellion LLC.
http://www.digitalrebellion.com
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