X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=doc%2Fencoders.texi;h=7b095754d1d982f800815c7490f9623ebfb98483;hb=146cdf7e4bb029c9e457742d82d00d3b396b9ff4;hp=88ef8f9b230b4548455e3c0f39b3d6978cbb29fc;hpb=980af9a88cfd743d71fad67e7dd905231ea0a4f7;p=ffmpeg diff --git a/doc/encoders.texi b/doc/encoders.texi index 88ef8f9b230..7b095754d1d 100644 --- a/doc/encoders.texi +++ b/doc/encoders.texi @@ -64,7 +64,6 @@ to find an optimal combination by adding or subtracting a specific value from all quantizers and adjusting some individual quantizer a little. Will tune itself based on whether @option{aac_is}, @option{aac_ms} and @option{aac_pns} are enabled. -This is the default choice for a coder. @item anmr Average noise to mask ratio (ANMR) trellis-based solution. @@ -77,10 +76,10 @@ Not currently recommended. @item fast Constant quantizer method. -This method sets a constant quantizer for all bands. This is the fastest of all -the methods and has no rate control or support for @option{aac_is} or -@option{aac_pns}. -Not recommended. +Uses a cheaper version of twoloop algorithm that doesn't try to do as many +clever adjustments. Worse with low bitrates (less than 64kbps), but is better +and much faster at higher bitrates. +This is the default choice for a coder @end table @@ -982,6 +981,11 @@ Other values include 0 for mono and stereo, 1 for surround sound with masking and LFE bandwidth optimizations, and 255 for independent streams with an unspecified channel layout. +@item apply_phase_inv (N.A.) (requires libopus >= 1.2) +If set to 0, disables the use of phase inversion for intensity stereo, +improving the quality of mono downmixes, but slightly reducing normal stereo +quality. The default is 1 (phase inversion enabled). + @end table @anchor{libshine} @@ -2155,6 +2159,12 @@ Set the x265 preset. @item tune Set the x265 tune parameter. +@item profile +Set profile restrictions. + +@item crf +Set the quality for constant quality mode. + @item forced-idr Normally, when forcing a I-frame type, the encoder can select any type of I-frame. This option forces it to choose an IDR-frame. @@ -2355,6 +2365,11 @@ Never write it. @itemx always Always write it. @end table +@item video_format @var{integer} +Specifies the video_format written into the sequence display extension +indicating the source of the video pictures. The default is @samp{unspecified}, +can be @samp{component}, @samp{pal}, @samp{ntsc}, @samp{secam} or @samp{mac}. +For maximum compatibility, use @samp{component}. @end table @section png