[FFmpeg-devel] [PATCH] Change behviour of empty AVFilterFormats lists

[Mina Nagy Zaki]

This makes an empty list mean 'all formats supported'. This will simplify some 
things for the format negotiation later on. Before the patch, returning an 
empty list in query_formats() would simply mean no format supported, which is 
non-sensical. This way a lot of unnecessary merging of 'all formats' lists is 
avoided. 


-- 
Mina
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