[FFmpeg-user] Has -t format changed?

Moritz Barsnick barsnick at gmx.net
Sun Apr 12 11:56:54 CEST 2015

On Sun, Apr 12, 2015 at 00:28:07 +0000, Carl Eugen Hoyos wrote:
> > Move -t behind -i, since -t always was an output 
> > option, this mostly worked by chance.
> Reading some old mails, this is apparently wrong, 
> -t may have been an input option in the past.

Actually, according to the documentation, it is supposed to be an input
output. It doesn't sound like chance at all:

‘-t duration (input/output)’

    When used as an input option (before -i), limit the duration of
    data read from the input file.

    When used as an output option (before an output filename), stop
    writing the output after its duration reaches duration.

The documentation was changed in this commit from April 2014:


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