[FFmpeg-user] ffmpeg mp4 encoding with cfr is not working

[Andrey Aleksandrovich]

'fps= 17' shows you encoding speed in 'fps' units.

On 6/21/13, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Sangsu Baek <sangsu.baek <at> gmail.com> writes:
>
>> Is there any hint to fix this matching problem ?
>
> Which problem?
> You reported that you need 15fps output and provided
> the following status line:
>
>  frame=  194 fps= 17 q=5.3 Lsize=     401kB time=00:00:12.93
>
> As explained, this status line indicates that your
> output is exactly 15fps (194 / 12.93).
> (Apart from the fact that ffmpeg ... out.mp4 can
> only produce constant frame rate because the mp4
> muxer does not support anything else.)
> If you are worried about the fps indicator in the
> status line: It is a performance indicator that
> cannot work for v4l2 input.
> (It works insofar as you know the encoding does
> not work if the performance indicator indicates
> a lower performance than the fps rate that you
> requested.)
>
> Carl Eugen
>
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