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MPLAYER #27 MPlayer Man Page

45,

07:40,

2008-11-30 22:35:48

Description: http://www.mplayerhq.hu/ - that do not support brightness and contrast controls in hardware. Might also be useful with MEncoder, either for fixing poorly captured movies, or for slightly reducing (More) http://www.mplayerhq.hu/ - that do not support brightness and contrast controls in hardware. 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 bi-trates. initial brightness initial contrast Alternative software equalizer that uses lookup tables (very slow), allowing gamma correction in addition to simple brightness and contrast adjustment. Note that it uses the same MMX opti-mized code as -vf eq if all gamma values are 1.0. The parameters are given as floating point values. initial gamma value (default: 1.0) initial contrast, where negative values result in a negative image (default: 1.0) initial brightness(default: 0.0) initial saturation (default: 1.0) gamma value for the red component (default: 1.0) gamma value for the green component (default: 1.0) gamma value for the blue component (default: 1.0) The weight parameter can beused to reduce the effect of a high gamma value on bright image areas, e.g. keep them from getting overamplified and just plain white. A value of 0.0 turns the gamma correction all the way down while 1.0 leaves it at its fullstrength (default: 1.0). Software equalizer with interactive controls just like the hardware equalizer, for cards/drivers that do not support hue and saturation controls in hardware. initial hue (default: 0.0) initial saturation, where neg-ative values result in a negative chroma (default: 1.0) Convert planar YUV 4:2:0 to half-height packed 4:2:2, downsampling luma but keeping all chroma samples. Useful for output to low-resolution display devices when hardwaredownscaling is poor quality or is not available. Can also be used as a primitive luma-only deinterlacer with very low CPU usage. By default, halfpack averages pairs of lines when downsampling. Any value different from 0 or 1 givesthe default (averaging) behavior. 0: Only use even lines when downsampling. 1: Only use odd lines when downsampling. When interlaced video is stored in YUV 4:2:0 formats, chroma interlac-ing does not line up properly due to vertical downsampling of the chroma channels. This filter packs the planar 4:2:0 data into YUY2 (4:2:2) format with the chroma lines in their proper locations, so that in any giv en scanline,the luma and chroma data both come from the same field. Select the sampling mode. 0: nearest-neighbor sampling, fast but incorrect1: linear interpolation (default) Only useful with MEncoder. If harddup is used when encoding, it will force duplicate frames to be encoded in the output. This uses slightly more space, but is necessary for output to MPEG files orif you plan to demux and remux the video stream after encoding. Should be placed at or near the end of the filter chain unless you have a good reason to do otherwise. Only useful with MEncoder. Softskip moves the frame skip-ping (dropping) step of encoding from before the filter chain to some point during the filter chain. This allows filters which need to see all frames (inverse telecine, temporal denoising, etc.) to function properly. Should be placed afterthe filters which need to see all frames and before any subsequent filters that are CPU-intensive. Drops frames that do not differ greatly from the previous frame in order to reduce framerate. The main use of this filter is for very-low-bitrate encoding (e.g. streaming over dialup modem), but it could in theory be used for fixing movies that were inverse-telecined incorrectly. Sets the maximum number of consecutive frames which can be dropped (if positive),or the minimum interval between dropped frames (if negative). A frame is a candidate for dropping if no 8x8 region differs by more than a threshold of [hi], and if not more than [frac] portion (1 meaning the whole image) differs bymore than a threshold of [lo]. Values of [hi] and [lo] are for 8x8 pixel blocks and represent actual pixel value differences, so a threshold of 64 corresponds to 1 unit of difference for each pixel, or the same spread out differentlyover the block. The drop-deinterlace (dint) filter detects and drops the first from a set of interlaced video frames. relative difference between neighboring pixels (default: 0.1) What part of the image has to be detected as interlacedto drop the frame (default: 0.15). FFmpeg deinterlacing filter, same as -vf pp=fd Donald Graft's adaptive kernel deinterlacer. Deinterlaces parts of a video if a configurable threshold is exceeded. threshold (default: 10) 0: Ignorepixels exceeding the threshold (default). 1: Paint pixels exceeding the threshold white. 0: Leave fields alone (default).1: Swap fields. 0: Disable additional sharpening (default). 1: Enable additional sharpening. 0: Disable twow ay sharpening (default).1: (Less)

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