Apoligies for a noob questsion, but: How do I route ffmpeg output to the screen 
on MacOSX? 




If I type: 
ffmpeg -i input.mp4 -i logo.png -filter_complex overlay  output.mp4 


The output file contains the input file with the logo overlayed on top of it. 

If I type: 
ffplay -i input.mp4 -i logo.png -filter_complex overlay 


Then it throws the error: 
Argument 'logo.png' provided as input filename, but 'input.mp4' was already 
specified. 


...but typing: 
ffplay -filters 


displays a list of filters including: 
T.C overlay          VV->V      Overlay a video source on top of the input. 


Clearly, I'm missing something obvious. 




How do I route ffmpeg output to the screen, and where can I find a list of 
which filters and options work in ffmpeg but not in ffplay? 




-- Richard 
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