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author | Tomas Härdin <git@haerdin.se> | 2022-04-09 10:21:31 +0200 |
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committer | Tomas Härdin <git@haerdin.se> | 2022-05-12 11:19:12 +0200 |
commit | 61bcd7737dca1f89235a63c97010822896735b09 (patch) | |
tree | 59f228d50f783ca160b94779d932057720193c48 /doc/encoders.texi | |
parent | ee9345e9054c78ada2e3eda95750c2b4457fc462 (diff) |
doc/encoders.texi: Document cinepak encoder
Diffstat (limited to 'doc/encoders.texi')
-rw-r--r-- | doc/encoders.texi | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/doc/encoders.texi b/doc/encoders.texi index 966032a720..f34024ec14 100644 --- a/doc/encoders.texi +++ b/doc/encoders.texi @@ -1271,6 +1271,54 @@ follows. A64 / Commodore 64 multicolor charset encoder. @code{a64_multi5} is extended with 5th color (colram). +@section Cinepak + +Cinepak aka CVID encoder. +Compatible with Windows 3.1 and vintage MacOS. + +@subsection Options + +@table @option +@item keyint_min @var{integer} +Keyframe interval. +A keyframe is inserted every @code{-keyint_min}-th frame. + +@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}: + +@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 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 400} 266 kb/s +@item @code{-q:v 1000} 237 kb/s +@end table + +@item max_extra_cb_iterations @var{integer} +Max extra codebook recalculation passes, more is better and slower. + +@item skip_empty_cb @var{boolean} +Avoid wasting bytes, ignore vintage MacOS decoder. + +@item max_strips @var{integer} +@itemx min_strips @var{integer} +The minimum and maximum number of strips to use. +Wider range sometimes improves quality. +More strips is generally better quality but costs more bits. +Vintage compatible is 1..3. + +@item strip_number_adaptivity @var{integer} +How much number of strips is allowed to change between frames. +Higher is better but slower. + +@end table + @section GIF GIF image/animation encoder. |