diff options
Diffstat (limited to 'doc/ffmpeg.texi')
| -rw-r--r-- | doc/ffmpeg.texi | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index 50b2c8b8f0..a923f97867 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -272,9 +272,15 @@ Set the file size limit, expressed in bytes. @item -ss @var{position} (@emph{input/output}) When used as an input option (before @code{-i}), seeks in this input file to -@var{position}. When used as an output option (before an output filename), -decodes but discards input until the timestamps reach @var{position}. This is -slower, but more accurate. +@var{position}. Note the in most formats it is not possible to seek exactly, so +@command{ffmpeg} will seek to the closest seek point before @var{position}. +When transcoding and @option{-accurate_seek} is enabled (the default), this +extra segment between the seek point and @var{position} will be decoded and +discarded. When doing stream copy or when @option{-noaccurate_seek} is used, it +will be preserved. + +When used as an output option (before an output filename), decodes but discards +input until the timestamps reach @var{position}. @var{position} may be either in seconds or in @code{hh:mm:ss[.xxx]} form. @@ -1060,6 +1066,12 @@ This option is similar to @option{-filter_complex}, the only difference is that its argument is the name of the file from which a complex filtergraph description is to be read. +@item -accurate_seek (@emph{input}) +This option enables or disables accurate seeking in input files with the +@option{-ss} option. It is enabled by default, so seeking is accurate when +transcoding. Use @option{-noaccurate_seek} to disable it, which may be useful +e.g. when copying some streams and transcoding the others. + @item -override_ffserver (@emph{global}) Overrides the input specifications from ffserver. Using this option you can map any input stream to ffserver and control many aspects of the encoding from |