I have request/report about sth 'zones' option in xvid encoder. Currently this option is incomplete, or not work as expected. Here is the document of this option for xvid_encraw 1.3.5.
-zones start,mode,value[,options][/start,mode,value[,options]]...
Parameters of a zone use the comma (,) as a delimiter. Multiple zones are
separated by a slash (/). The end of each zone is defined by either the start
of the following zone or the last frame of the input file.
start : start frame of the zone
mode : weight zone = w, quantizer zone = q
value : depending on mode either the zone's weight or quantizer
options : enable certain encoder features for the zone. Each feature is
represented by a single letter. An integer number stands for
b-frame sensitivity. To enable multiple features at the same time
combine the appropriate symbols without any delimiting characters.
K = begin with keyframe
O = enable chroma optimizer
G = greyscale encoding
C = cartoon mode
integer = b-frame sensitivity
Example:
to create a first zone starting at frame 0 with weight 1.0, all options
enabled and b-frame sensitivity -5, and a second zone starting at frame 1000
with constant quant 4 and no options enabled you would use the -zones option
like this:
-zones 0,w,1.0,-5KOGC/1000,q,4
zones options is work as expected on xvid_encraw. Mencoder uses same xvidcore 1.3.5 so this option should be available as it is I believe. but currently, Seems 'zones' on Mencoder xvid doesn't really parse [,options], '-5KOGC' part in Example section is ignored. As a result can not use full feature of it.
Most importantly, This is the only option available to forcing specific frame to keyframe. Without this option There are no way to align keyframes, such as each frame of chapter start points.
As far as I know, xvid is more than 20 years old codec. Funnily, Still there are no encoders around do it properly. All encoders have serious bug or misfeatured. Even xvid_encraw has serious bug/imperfect feature which makes you can't encode anything at all. I really hope if Mencoder xvid could be fully featured.
I have request/report about sth 'zones' option in xvid encoder. Currently this option is incomplete, or not work as expected. Here is the document of this option for xvid_encraw 1.3.5.
-zones start,mode,value[,options][/start,mode,value[,options]]...
Parameters of a zone use the comma (,) as a delimiter. Multiple zones are
separated by a slash (/). The end of each zone is defined by either the start
of the following zone or the last frame of the input file.
start : start frame of the zone
mode : weight zone = w, quantizer zone = q
value : depending on mode either the zone's weight or quantizer
options : enable certain encoder features for the zone. Each feature is
represented by a single letter. An integer number stands for
b-frame sensitivity. To enable multiple features at the same time
combine the appropriate symbols without any delimiting characters.
K = begin with keyframe
O = enable chroma optimizer
G = greyscale encoding
C = cartoon mode
integer = b-frame sensitivity
Example:
to create a first zone starting at frame 0 with weight 1.0, all options
enabled and b-frame sensitivity -5, and a second zone starting at frame 1000
with constant quant 4 and no options enabled you would use the -zones option
like this:
-zones 0,w,1.0,-5KOGC/1000,q,4
zones options is work as expected on xvid_encraw. Mencoder uses same xvidcore 1.3.5 so this option should be available as it is I believe. but currently, Seems 'zones' on Mencoder xvid doesn't really parse [,options], '-5KOGC' part in Example section is ignored. As a result can not use full feature of it.
Most importantly, This is the only option available to forcing specific frame to keyframe. Without this option There are no way to align keyframes, such as each frame of chapter start points.
As far as I know, xvid is more than 20 years old codec. Funnily, Still there are no encoders around do it properly. All encoders have serious bug or misfeatured. Even xvid_encraw has serious bug/imperfect feature which makes you can't encode anything at all. I really hope if Mencoder xvid could be fully featured.