[FFmpeg-user] FFmpeg manual - asking for clarification of a definition

[ILJA SHEBALIN]

Okm then to simplify the question what what bits of data are actually read
when -t is before an  input file?

On Tue, Oct 24, 2017 at 2:23 AM, Carl Eugen Hoyos <ceffmpeg at gmail.com>
wrote:

> 2017-10-23 23:29 GMT+02:00 ILJA SHEBALIN <iljashebalin2 at gmail.com>:
> > FFmpeg manual - Main options;
> >
> > -t duration (*input/output*)
> >
> > When used as an input option (before -i), limit the duration of data read
> > from the input file.
> >
> > I have a hard time understanding what the formulation was supposed to
> > denote. Is the option limiting the data to the *duration *or is the data
> > that's out of the scope of the *duration *is read?
>
> (I don't understand this question, sorry)
>
> Normally, -t is used like:
> $ ffmpeg -i input -t 10 output
> Only ten seconds are encoded.
> The following is possible:
> $ ffmpeg -i input -t 10 output1 output2
> output2 has the duration of the input file
> $ ffmpeg -t 10 -i input output1 output2
> All output files are ten seconds long.
>
> The input option may have issues (although I didn't find
> any on the bug tracker, I mixed it up with the input
> option -r).
>
> Carl Eugen
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