Late follow-up:
Had a few occurences of stray frames recently.
Win7U64 32GB, Vegas Pro 14, 20GB for scrubbing, 32bit precision, GPU activated.
FX chain using ProDAD Mercalli V4 beside other standard FX: Curves, etc.
Only if using Mercalli in GPU Mode:
Although all clips ("events" in Vegas speak) had been Mercalli-motion analysed through and through multiple times while cutting,
after lossless rendering just one stray frame occurred showing Mercalli's "Not Analysed Yet" spoiler.
Not at a clip border, just hidden in the middle.
Switching Mercalli to CPU helped: the stray frame went away.
GPU traffic guilty ? Processed Frame content not coming in time ?
One frame's worth input copied to output without processing ? Just guessing.
Besides of that, some cache management (here in Vegas) may also be responsible.
For a very complex project I had to close and reopen Vegas if Mercalli finds an already analysed event "Unanalysed",
but there the spoiler was applied across all frames of such event.
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Last edited by Emulgator; 16th July 2021 at 00:51.
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