doc/encoders.texi: Document updated behavior

Bitrates of akiyo changed slightly.

Tomas Härdin committed 4 years ago

Commit 30e2bb01 parent 1cd85961 file · +6 −5Browse files

Unified · Split

 @subsection Options
 @table @option
-@item keyint_min @var{integer}
+@item g @var{integer}
 Keyframe interval.
-A keyframe is inserted every @code{-keyint_min}-th frame.
+A keyframe is inserted at least every @code{-g} frames, sometimes sooner.
 @item q:v @var{integer}
 Quality factor. Lower is better. Higher gives lower bitrate.
-The following table lists bitrates when encoding akiyo_cif.y4m for various values of @code{-q:v} with @code{-keyint_min 100}:
+The following table lists bitrates when encoding akiyo_cif.y4m for various values of @code{-q:v} with @code{-g 100}:
 @table @option
 @item @code{-q:v 1} 1918 kb/s
 @item @code{-q:v 2} 1735 kb/s
 @item @code{-q:v 4} 1500 kb/s
-@item @code{-q:v 10} 1064 kb/s
+@item @code{-q:v 10} 1041 kb/s
 @item @code{-q:v 20} 826 kb/s
 @item @code{-q:v 40} 553 kb/s
 @item @code{-q:v 100} 394 kb/s
-@item @code{-q:v 200} 311 kb/s
+@item @code{-q:v 200} 312 kb/s
 @item @code{-q:v 400} 266 kb/s
 @item @code{-q:v 1000} 237 kb/s
 @end table
 The minimum and maximum number of strips to use.
 Wider range sometimes improves quality.
 More strips is generally better quality but costs more bits.
+Fewer strips tend to yield more keyframes.
 Vintage compatible is 1..3.
 @item strip_number_adaptivity @var{integer}

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