Apple

On Sep 20, 2011, at 7:01 PM, Jon Chappell wrote:

I was playing around with a test project and exported an XML file. The duration and offset timebases of the media are predictable: 2400, 48000, 50, etc.

However, the marker start times seem to have bizarre timebases. Why is the timebase for the start position not inherited from the clip or project timebase like the duration?

Here's a sample of the XML file. You can see that the marker durations are all "100/2400s" but the start times all have different and seemingly random timebases. Is this by design or is it a bug? The FCP XML guide doesn't mention it.

          <clip name="90-8+_ProRes_Proxy" duration="37s" audioStart="0s" audioDuration="90000/2400s" format="r2" tcFormat="NDF">
                    <video ref="r4" duration="90000/2400s">
                        <audio lane="-1" ref="r4" duration="1800000/48000s" role="dialogue"/>
                    </video>
                    <clip lane="1" offset="67700/2400s" name="90-8+_ProRes_Proxy" duration="28700/2400s" start="42000/2400s" tcFormat="NDF">
                        <video ref="r4" duration="90000/2400s">
                            <audio lane="-1" ref="r4" duration="1800000/48000s" role="dialogue"/>
                        </video>
                    </clip>
                    <clip lane="-1" offset="76500/2400s" name="90-8+_ProRes_Proxy" duration="28700/2400s" start="42000/2400s" tcFormat="NDF">
                        <video ref="r4" duration="90000/2400s">
                            <audio lane="-1" ref="r4" duration="1800000/48000s" role="dialogue"/>
                        </video>
                    </clip>
                    <marker start="22/3s" duration="100/2400s" value="Marker 1"/>
                    <marker start="221/24s" duration="100/2400s" value="Marker 2"/>
                    <marker start="113/12s" duration="100/2400s" value="Marker 3"/>
                    <marker start="21/2s" duration="100/2400s" value="Marker 4"/>
                    <marker start="34/3s" duration="100/2400s" value="Marker 5"/>
                    <marker start="277/24s" duration="100/2400s" value="Marker 6"/>
                    <marker start="151/12s" duration="100/2400s" value="Marker 7"/>
                    <marker start="305/24s" duration="100/2400s" value="Marker 8"/>
                    <marker start="27/2s" duration="100/2400s" value="Marker 9"/>
                    <marker start="109/8s" duration="100/2400s" value="Marker 10"/>
                    <marker start="113/8s" duration="100/2400s" value="Marker 11"/>
                </clip>

Regards,
Jon Chappell.
CEO, Digital Rebellion LLC.
http://www.digitalrebellion.com

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References:
	>Random marker timebases (From: Jon Chappell <email@hidden>)
	>Re: Random marker timebases (From: Gregory Clarke <email@hidden>)