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| author | Stefano Sabatini <stefasab@gmail.com> | 2023-08-26 02:53:28 +0200 |
|---|---|---|
| committer | Stefano Sabatini <stefasab@gmail.com> | 2023-10-06 09:49:47 +0200 |
| commit | d0f071dfe743a410ff385c832b9c3ff47fd73c94 (patch) | |
| tree | 3dbfbe8a71362bfaae2da4cabf461a1767dea4ae | |
| parent | 6f421d9d4eb8425ce2ecb1f7f18b79ede3c60de9 (diff) | |
doc/encoders/libx264: clarify meaning of level option
In particular, clarify that it can either be set as a field of
AVCodecContext or as an x264 option, using a different specification.
Should address trac issue:
http://trac.ffmpeg.org/ticket/3947
| -rw-r--r-- | doc/encoders.texi | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/doc/encoders.texi b/doc/encoders.texi index d7d9584a0c..bf9a41c22e 100644 --- a/doc/encoders.texi +++ b/doc/encoders.texi @@ -2446,6 +2446,20 @@ Quantizer curve compression factor @item refs (@emph{ref}) Number of reference frames each P-frame can use. The range is from @var{0-16}. +@item level (@emph{level}) +Set the @code{x264_param_t.i_level_idc} value in case the value is +positive, it is ignored otherwise. + +This value can be set using the @code{AVCodecContext} API (e.g. by +setting the @code{AVCodecContext} value directly), and is specified as +an integer mapped on a corresponding level (e.g. the value 31 maps +to H.264 level IDC "3.1", as defined in the @code{x264_levels} +table). It is ignored when set to a non positive value. + +Alternatively it can be set as a private option, overriding the value +set in @code{AVCodecContext}, and in this case must be specified as +the level IDC identifier (e.g. "3.1"), as defined by H.264 Annex A. + @item sc_threshold (@emph{scenecut}) Sets the threshold for the scene change detection. |