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Improve documentation about -bt option

Originally committed as revision 14397 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Jason Garrett-Glaser 2008-07-25 21:04:06 +00:00
parent 37dcf83077
commit e3576e2513

View File

@ -385,7 +385,12 @@ blue (default = 000000 (black)).
@item -vn @item -vn
Disable video recording. Disable video recording.
@item -bt @var{tolerance} @item -bt @var{tolerance}
Set video bitrate tolerance (in bit/s). Set video bitrate tolerance (in bits, default 4000k).
Has a minimum value of: (target_bitrate/target_framerate).
In 1-pass mode, bitrate tolerance specifies how far ratecontrol is
willing to deviate from the target average bitrate value. This is
not related to min/max bitrate. Lowering tolerance too much has
an adverse effect on quality.
@item -maxrate @var{bitrate} @item -maxrate @var{bitrate}
Set max video bitrate (in bit/s). Set max video bitrate (in bit/s).
Requires -bufsize to be set. Requires -bufsize to be set.