@@ -588,11 +588,17 @@ A list file with the suffix @code{".m3u8"} will auto-select this format.

 If not specified the type is guessed from the list file name suffix.

 @item segment_time @var{time}

-Set segment duration to @var{time}. Default value is "2".

+Set segment duration to @var{time}, the value must be a duration

+specification. Default value is "2". See also the

+@option{segment_times} option.

+

+Note that splitting may not be accurate, unless you force the

+reference stream key-frames at the given time. See the introductory

+notice and the examples below.

 @item segment_time_delta @var{delta}

 Specify the accuracy time when selecting the start time for a

-segment. Default value is "0".

+segment, expressed as a duration specification. Default value is "0".

 When delta is specified a key-frame will start a new segment if its

 PTS satisfies the relation:

@@ -614,7 +620,8 @@ the specified time and the time set by @var{force_key_frames}.

 @item segment_times @var{times}

 Specify a list of split points. @var{times} contains a list of comma

-separated duration specifications, in increasing order.

+separated duration specifications, in increasing order. See also

+the @option{segment_time} option.

 @item segment_frames @var{frames}

 Specify a list of split video frame numbers. @var{frames} contains a