On Fri,  2 May 2014 01:04:36 -0700, Josh Allmann <[email protected]> 
wrote:
> Since the scaler is often auto-inserted in overlay filtergraphs,
> this avoids a runtime error when filters are selectively enabled.

????

Scalers can be inserted in _any_ graph with video filters, why should overlay of
all things be treated specifically.

-- 
Anton Khirnov
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