Fullscreen playing can be achieved by either enabling software scaling
- (use the -zoom or -vop scale
+ (use the -zoom or -vop scale
option, but I warn you: this is slow), or switching to a small resolution
video mode, for example 352x288. If you don't have YUV acceleration, the
latter method is recommended. Video mode switching can be enabled by
@@ -1061,231 +1042,6 @@ TV tuner.
mplayer -tv on:noaudio:driver=v4l:width=640:height=480:outfmt=i420 -vc rawi420 -vo xv
-Both MPlayer and MEncoder support using a universal - video filter layer, which comprises numerous plugins that are listed and - explained below. These plugins can perform various actions on the image, - such as rescaling, cropping black borders (useful not only for encoding but - for playback, too, since black borders increase bus usage and cropping these - can boost playback speed on slow boards) and expanding the image (for SVCDs).
- -With this filter layer it's possible to perform fast image format conversion
- between the various RGB and YUV formats when necessary. This enables for
- example playing RGB data on xv and xmga video output
- drivers among other things (see the Scale filter).
The filter layer also does Direct Rendering between the plugins, to - maximize the speed. - -
Note that the postprocessing code is now also a part of the layer. It - will be explained below.
- - - mplayer/mencoder -vop filter1,filter2,filter3,...
-
This sets up a filter pipeline (you can use any number of filters). Their
- parameters are optional and if omitted, some of them are set to default
- values, e.g. x and y are both set to the center of
- the screen and width and height will be set to
- the width and height of the movie.
Filters are queued starting from libvo, so filter1 will be the
- last filter called (after that comes libvo, or when using MEncoder,
- encoding).
You can get the list of available video filters with the command
- - mplayer -vop help
Description:
- -Crops the given part of the image and discards the rest. Useful for removing - black bands from widescreen movies.
- -Usage:
- - -vop crop[=width:height:x:y]
Description:
- -Expands (not scales) movie resolution to the given value and places
- the unscaled original at coordinates x y. For movies
- not containing black bands, this can be used to add them. This is good when
- creating SVCDs or for placing subtitles or the OSD in these bands.
Usage:
- - -vop expand[=width:height:x:y]
Description:
- -Realtime MPEG1 encoder (using libfame or libavcodec) (for use with - DVB/DXR3).
- -Usage:
- - -vop fame
-vop lavc
Description:
- -Simply flips the image upside down. Useful for some old codecs which can only - output a flipped image (these are autodetected).
- -Usage:
- - -vop flip
Description:
- -This filter is not an image format converter. It just forces the next - filter (or libvo) to use the given format. Useful for cards with slow YV12, - like tdfx and Savage4. For real conversion, use the scale filter.
- -Usage:
- - -vop format[=format] (where
- format can be for example: rgb32, yuy2, etc...)
Description:
- -This is our good old postprocess, just converted to the filter layer.
- Performs image quality enhancement, deinterlacing, etc, see
- -npp help for available options.
Usage:
- - -vop pp[=postprocess options/keywords]
Description:
- -Performs RGB 24/32 <-> BGR 24/32 colorspace conversion (default behavior) - or RGB 24/32 <-> RGB 24/32 conversion with R <-> B swapping (with the 'swap' - option).
- -Usage:
- - -vop rgb2bgr[=swap]
Description:
- -Rotates (flips) the image. The parameter x (values: 0-3)
- controls horizontal and vertical mirroring.
Usage:
- - -vop rotate[=x]
Description:
- -Scales the image with the software scaler (slow). You can adjust the
- quality of the scaler with the -sws option, see the man page.
- Nice quality implies speed loss.
Note: Calling this filter with no options means colorspace - conversion! This is useful for codecs which can't output in the needed - format for the specified video output device. These are hopefully - autodetected and scale filter is called to convert. In other cases, you - can use it manually.
- -Usage:
- - -vop scale[=width:height]
Description:
- -Forced software YV12/I420 to YUY2 conversion.
- -Usage:
- - -vop yuy2
Description:
- -Flips the image on Y axis.
- -Usage:
- - -vop mirror
Description:
- -Calculates Y scaling for DVB card.
- -Usage:
- - -vop dvbscale
Description:
- -Calculates necessary cropping parameters. It will print the recommended
- -vop crop parameters to stdout. You can adjust the threshold of
- what is detected as border and what as picture with the limit
- parameter. limit is a number from 0 to 255 that defaults to 24.
- At 0 it detects everything as picture, at 255 everything as border.
Usage:
- - -vop cropdetect[=limit]
Description:
- -Draws a rectangle of the requested width and height at the designated
- coordinates over the image. Useful to get visual feedback for the parameters
- of -vop crop before applying them.
Usage:
- - -vop rectangle[=width:height:x:y]