[FFmpeg-user] MacOSX Output Question

Richard Milewski richard at mozilla.com
Sun Aug 17 22:53:26 CEST 2014

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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