To make this clear, a speaker who is talking will have his words out of synch with (with the audio lagging behind) his video image. Because this happens sometimes during rendering of AVCHD at 24 FPS with the preview turned off during rendering, it does not appear to be a preview related matter, although it certainly happen during preview too. Rather, I suspect there is a bug in PD10's new engine that is specific to its processing of AVCHD material, a bug that Cyberlink is not admitting to. Here are some observations:
- All source video is AVCHD recorded at 60 FPS
- All source video was imported from 2 identical Panasonic TM-900 cameras, 2012 vintage.
- The A/V intermittently goes out of sync at transition points as a new scene commences.
- The out of synch condition occurs even if the A & V tracks are locked in the timeline.
- The problem also occurs when a video scene is overwritten with a .JPG and a crossfade is attached to each edge of the .JPG. The underlying audio goes out of sync at the opening transition that brings in the .JPG
Sometimes the transitions work fine and the audio stays in sync. But sometimes as a scene fades in, the audio from the new scene is out of sync with its video. The problem is intermittent, and I have not found a circumstance that reliably reproduces the out of sync condition.
Customer Support suggested checking the size of Virtual Memory (which is way more than adequate), only loading system services (which I have configured), ensuring all drivers are up to date (which they are) , and ensuring there is adequate disk space (over 100 GB is available). I have even tried disabling the network interface to remove a source of interrupts ~ all to no avail.
This is PD version 10.0.0.0.1424c on a new high end HP Envy 17, Quad Core I7 (the DxDiag.txt is attached), with a 7200RPM HDD, and a 2nd internal 120GB SSD. From some of the forum threads I have not used the SSD and all I/O is to/from the HDD.
All video editing has been halted until this is solved, but I will need to move on and purchase a different editing package soon if I can't resolve the issue. This'll be a 2 hour movie, ad I can't get the first few minutes to reliably preview or render...
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