[FFmpeg-devel] [PATCH] libavfilter-soc: Make overlay handle still images

[Martin Storsjö]

Hi,

Currently, the overlay filter can't properly handle the case when one 
input is a still image. The filter logic determines that the still image 
input is the one currently being behind and just tries to get a new frame 
from that input, without actually getting any frame with a pts higher than 
the one from the running video.

The attached patch is an initial attempt at fixing this: If the filter 
receives a new frame with the same pts as the previous one, it marks that 
input as having reached eof and doesn't try to read any more data from 
that input.

// Martin
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