[FFmpeg-user] ffmpeg output messages

Moritz Barsnick barsnick at gmx.net
Mon May 18 10:37:52 EEST 2020

On Sun, May 17, 2020 at 18:50:49 -0600, JD wrote:
> (using  ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers).
> what does it mean when ffmpeg (during transcode)
> belches out:
> bitrate=1366.8kbits/s dup=0 drop=133  speed=0.404x
> So, if there were 0 duplicates, why drop 133 frames?

Duplication and dropping are two opposite mechanism, though both can
happen in the same conversion. Dupes are to fill for missing frames,
drops are to remove expendable frames.

> And what does the message mean?

It really depends on what you were doing, Could you kindly show us the
actual command line used, and the complete console output?

> Should I specify a higher fps?

Again, it depends on what you are doing, and what you need to achieve.


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