ffmpeg: add option stats_period

At present, progress stats are updated at a hardcoded interval of
half a second. For long processes, this can lead to bloated
logs and progress reports.

Users can now set a custom period using option -stats_period
Default is kept at 0.5 seconds.

1 files changed, 6 insertions, 1 deletions

diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index 95d6463685..62015d7565 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -675,14 +675,19 @@ Specify the preset for matching stream(s).
 Print encoding progress/statistics. It is on by default, to explicitly
 disable it you need to specify @code{-nostats}.
 
+@item -stats_period @var{time} (@emph{global})
+Set period at which encoding progress/statistics are updated. Default is 0.5 seconds.
+
 @item -progress @var{url} (@emph{global})
 Send program-friendly progress information to @var{url}.
 
-Progress information is written approximately every second and at the end of
+Progress information is written periodically and at the end of
 the encoding process. It is made of "@var{key}=@var{value}" lines. @var{key}
 consists of only alphanumeric characters. The last key of a sequence of
 progress information is always "progress".
 
+The update period is set using @code{-stats_period}.
+
 @anchor{stdin option}
 @item -stdin
 Enable interaction on standard input. On by default unless standard input is