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9 <track caps='video/x-raw' track-type='4' track-id='0' properties='properties, async-handling=(boolean)false, message-forward=(boolean)false, caps=(string)video/x-raw, restriction-caps=(string)"video/x-raw\,\ width\=\(int\)320\,\ height\=\(int\)240\,\ framerate\=\(fraction\)25/1";' metadatas='metadatas;'/>
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15 <layer priority='1' properties='properties, auto-transition=(boolean)false;' metadatas='metadatas, volume=(float)1;'>
16 <clip id='1' asset-id='file://$HOME/Videos/gst-qa-assets/medias//opus_jpeg.0.mkv' type-name='GESUriClip' layer-priority='1' track-types='6' start='250000000' duration='1000000000' inpoint='0' rate='0' properties='properties, mute=(boolean)false, is-image=(boolean)false;' >
19 <layer priority='2' properties='properties, auto-transition=(boolean)false;' metadatas='metadatas, volume=(float)1;'>
20 <clip id='2' asset-id='file://$HOME/Videos/gst-qa-assets/medias//opus_jpeg.0.mkv' type-name='GESUriClip' layer-priority='2' track-types='6' start='500000000' duration='1000000000' inpoint='0' rate='0' properties='properties, mute=(boolean)false, is-image=(boolean)false;' >
23 <layer priority='3' properties='properties, auto-transition=(boolean)false;' metadatas='metadatas, volume=(float)1;'>
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