mirror of
https://github.com/mpv-player/mpv
synced 2024-12-15 03:15:52 +00:00
eb4c371b32
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7065 b3059339-0415-0410-9bf9-f77b7e298cf2
176 lines
7.3 KiB
Plaintext
176 lines
7.3 KiB
Plaintext
VideoOutPlugins - Video Filters
|
|
===============
|
|
|
|
video filters are plugin-like code modules implementing the interface
|
|
defined in vf.h
|
|
|
|
basically it means video output manipulation, ie. these plugins can
|
|
modify the image and the image properties (size, colorspace etc) between
|
|
the video decoders (vd.h) and output layer (libvo or video encoders)
|
|
|
|
the actual API is a mixture of the video decoder (vd.h) and libvo
|
|
(video_out.h) APIs.
|
|
|
|
the main differences:
|
|
- vf plugins may be "loaded" multiple times, with different parameters
|
|
and context - it's new in mplayer, old APIs weren't reentrant
|
|
- vf plugins don't have to implement all functions - all funcs has
|
|
'fallback' version, so the plugins only override these if want
|
|
- each vf plugin has its own get_image context, and they can interchange
|
|
images/buffers using these get_image/put_image calls.
|
|
|
|
API details:
|
|
-- TO DO -- (see vf.h fpr API and vf_*.c for examples)
|
|
|
|
Current plugins:
|
|
================
|
|
|
|
-vop crop[=w:h:x:y]
|
|
Simple cropping plugin.
|
|
w,h (cropped width,height) defaults to original width,height
|
|
x,y (position of cropped subimage on the original image) defaults to center
|
|
MPI: EXPORT only, using stride manipulation
|
|
|
|
-vop expand[=w:h:x:y:o]
|
|
Expanding _and_ (optional) OSD rendering plugin.
|
|
w,h (expanded width,height) defaults (-1) to original width,height
|
|
x,y (position of original image on the expanded image) defaults (-1) to center
|
|
o (0=disable/1=enable SUB/OSD rendering) defaults (0) to disabled
|
|
MPI: DR (if possible) or copy
|
|
Special: mpcodecs core uses it to solve stride restrictions between filters
|
|
mencoder uses (autoload) it to render SUB/OSD
|
|
|
|
-vop flip
|
|
Flips image upside-down (vertical mirroring)
|
|
No parameters.
|
|
MPI: DR (if possible) or EXPORT, using stride manipulation
|
|
Special: dec_video autoloads it when flipping is required and libvo can't do
|
|
|
|
-vop mirror
|
|
Horizontal mirroring
|
|
No parameters.
|
|
MPI: TEMP
|
|
|
|
-vop rectangle[=w:h:x:y]
|
|
Draw a rectangle. Useful for testing crop plugin parameters.
|
|
w,h (rectangle's width and height) defaults (-1) to maximum
|
|
possible width while keeping the boundaries visible.
|
|
x,y (rectangle's top left corner position) defauts (-1) to upper
|
|
left most position.
|
|
The plugin responds to the input.conf directive "change_control"
|
|
that takes two parameters. The first parameter can be 0 for w, 1
|
|
for h, 2 for x or 3 for y. The second parameter is the amount to
|
|
change the designated rectangle boundary.
|
|
MPI: TEMP, accepts stride
|
|
|
|
-vop rotate[=x]
|
|
Rotate image +/- 90 degrees
|
|
Optional 'x' parameter (0..3) controls horizontal and vertical mirroring
|
|
MPI: TEMP
|
|
|
|
-vop scale[=w:h[:c[:p]]]
|
|
Software scaling (zoom) _and_ yuv<->rgb colorspace conversion
|
|
w,h (new width/height after scaling) defaults to original width,height
|
|
note: if -zoom is used, and underlaying filters (including libvo)
|
|
uncapable of scaling, then it defaults to d_width/d_height !
|
|
note 2: w/h values -1 means original width/height, 0 means scaled
|
|
d_width/d_height. -2/-3 means calculating w or h using the other
|
|
dimension and the original (-3) or prescaled (-2) aspect ratio.
|
|
c chroma skipping
|
|
0 -> use all available input lines for chroma
|
|
1 -> use only every 2. input line for chroma
|
|
2 -> use only every 4. input line for chroma
|
|
3 -> use only every 8. input line for chroma
|
|
p scaling parameter (depends upon the used scaling method)
|
|
for -sws 2 (bicubic) its sharpness (0 (soft) - 100 (sharp))
|
|
for -sws 7 (gaussian) its sharpness (0 (soft) - 100 (sharp))
|
|
for -sws 9 (lanczos) its filter length (1 - 10)
|
|
MPI: TEMP, accepts stride
|
|
Special: dec_video and mpcodecs core autoloads it for colorspace conv.
|
|
|
|
-vop yuy2
|
|
Forced software YV12/I420 -> YUY2 conversion
|
|
(usefull for video cards/drivers with slow YV12 but fast YUY2 support)
|
|
MPI: TEMP, accepts stride
|
|
|
|
-vop rgb2bgr[=swap]
|
|
RGB 24/32 <-> BGR 24/32 colorspace conversion (default) or
|
|
RGB 24/32 <-> RGB 24/32 conversion with R<->B swapping ('swap' option)
|
|
MPI: TEMP, accepts stride
|
|
|
|
-vop palette
|
|
RGB/BGR 8 -> RGB/BGR 15/16/24/32 colorspace conversion using palette
|
|
MPI: TEMP, accepts stride
|
|
|
|
-vop format[=fourcc]
|
|
_restrict_ the list of supported colorspaces (query-format()) to a single,
|
|
given fourcc. The 'fourcc' option defaults to 'yuy2', but may be any
|
|
format name, like rgb15, bgr24, yv12 etc...
|
|
note again, it does NOT do any conversion, it just limits the _next_
|
|
plugins format list.
|
|
MPI: passthru
|
|
|
|
-vop pp[=flags]
|
|
Postprocessing filter. (usefull for codecs without built-in
|
|
postprocessing, like libmpeg12 or libavcodec)
|
|
Flags is a bitmask set of enabled filters (see manpage for -pp details),
|
|
defaults to the value of divx_quality (set by -pp commandline option)
|
|
MPI: DR (if possible) or TEMP
|
|
Special: dec_video autoloads it if -pp option used but codec can't do pp.
|
|
|
|
-vop lavc[=quality:fps]
|
|
Fast software YV12->MPEG1 conversion, usefull for dxr3/dvb drivers
|
|
It uses libavcodec. Currently faster and better quality than -vop fame!
|
|
Param quality: fixed qscale (1<=quality<32) or bitrate (32<=quality KBits)
|
|
Param fps: force output fps (float value). If not give, or 0, it's
|
|
autodetected based on height (240,480->29.97fps, others -> 25fps)
|
|
MPI: EXPORT special
|
|
|
|
-vop fame
|
|
Fast software YV12->MPEG1 conversion, usefull for dxr3/dvb drivers
|
|
It uses libfame.
|
|
MPI: EXPORT special
|
|
|
|
-vop dvbscale[=aspect]
|
|
Setup scaling to the optimal values for the DVB card.
|
|
(use HW for X-scaling, calc sw Y scaling to keep aspect)
|
|
The 'aspect' parameter controls aspect ratio, it should be calculated
|
|
as aspect=DVB_HEIGHT*ASPECTRATIO, default is 576*(4/3)=768
|
|
(for 16:9 TV set it to 576*(16/9)=1024)
|
|
It's only usefull together with expand+scale:
|
|
-vop lavc,expand=-1:576:-1:-1:1,scale=-1:0,dvbscale
|
|
MPI: passthru
|
|
|
|
-vop cropdetect[=limit]
|
|
It's a special filter, it doesn't alter the image itself, but detects
|
|
(using some kind of heuristics) the black borders/bands of the image,
|
|
and prints the optimal -vop crop= parameters to the stdout/console.
|
|
It calculates the average value of pixel luminances for a line, and
|
|
depending on the result it's either black band (result<=limit) or
|
|
picture (result>limit). Optional parameter 'limit' defaults to 24.
|
|
MPI: EXPORT
|
|
|
|
-vop test[=first frame number]
|
|
generate various test patterns
|
|
MPI: TEMP, accepts stride
|
|
|
|
-vop noise[=lumaNoise[u][t|a][h]:chromaNoise[u][t|a][h]
|
|
add noise
|
|
0<= lumaNoise, chromaNoise <=100
|
|
u uniform noise (gaussian otherwise)
|
|
t temporal noise (noise pattern changes between frames)
|
|
a averaged temporal (smoother, but a lot slower)
|
|
h high quality (slightly better looking, slightly slower)
|
|
p mix random noise with a (semi)regular pattern
|
|
MPI: DR (if possible) or TEMP, accepts stride
|
|
|
|
-vop eq[=brightness:contrast]
|
|
software equalizer, for use with cards that don't support
|
|
brightness and contrast controls in hardware. It might also be
|
|
useful with mencoder, either for fixing poorly captured movies, or
|
|
for slightly reducing contrast to mask artifacts and get by with
|
|
lower bitrates. Initial values in the range -100..100 may be
|
|
given on the command line, and the eq filter is controllable
|
|
interactively just like with normal hardware equalizer controls.
|
|
|