[FFmpeg-user] Meaning of input frame rate

Dzung Nguyen dzungng89 at gmail.com
Fri Aug 23 18:15:22 CEST 2013

What's the meaning of input frame rate. For example, what does this command

ffmpeg -loop 1 -r 1 -i image.png -q:v 0 -r 29.97 out.mpg

Instead of

ffmpeg -loop 1 -r 29.97 -i image.png -q:v 0 -r 29.97

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