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doc/ffmpeg: Try to clarify that the input option -r is not the same as -framerate.

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Carl Eugen Hoyos 2014-08-24 02:49:06 +02:00
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doc/ffmpeg.texi
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@ -473,6 +473,9 @@ Set frame rate (Hz value, fraction or abbreviation).
As an input option, ignore any timestamps stored in the file and instead
generate timestamps assuming constant frame rate @var{fps}.
This is not the same as the @option{-framerate} option used for some input formats
like image2 or v4l2 (it used to be the same in older versions of FFmpeg).
If in doubt use @option{-framerate} instead of the input option @option{-r}.
As an output option, duplicate or drop input frames to achieve constant output
frame rate @var{fps}.