[FFmpeg-user] Pixel format: default and filter?

[Nicolas George]

amindfv at mailbox.org (12020-09-12):
> But if I create a trivial filter:
                    ^^^^^^^
> 
>     ffmpeg -i a.mov -i b.mov -filter_complex '[0:v][1:v]overlay' out.mov
                                       ^^^^^^^

There's your problem: your filter is not trivial at all. Overlay
requires compatibility between the formats of its inputs, and therefore
cannot work with the normal format negotiation.

I suggest you peruse its documentation to see how to set the format.

Regards,

-- 
  Nicolas George
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