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author | Arwa Arif <arwaarif1994@gmail.com> | 2014-12-07 16:26:46 +0300 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2014-12-12 03:03:44 +0300 |
commit | 100fc395b642bc7fbd290766b5a176b7c717ac94 (patch) | |
tree | 1159f0bf187f35a500b643b712c624bf4b062ed0 /doc | |
parent | e2829a8175de8a2c64b45c70e21f46ec528eea99 (diff) |
lavfi: USPP Filter
Previous version reviewed by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/filters.texi | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 0ea39559d8..910f12fba9 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -8935,6 +8935,31 @@ unsharp=7:7:-2:7:7:-2 @end example @end itemize +@section uspp + +Apply ultra slow/simple postprocessing filter that compresses and decompresses +the image at several (or - in the case of @option{quality} level @code{8} - all) +shifts and average the results. + +The way this differs from the behavior of spp is that uspp actually encodes & +decodes each case with libavcodec Snow, whereas spp uses a simplified intra only 8x8 +DCT similar to MJPEG. + +The filter accepts the following options: + +@table @option +@item quality +Set quality. This option defines the number of levels for averaging. It accepts +an integer in the range 0-8. If set to @code{0}, the filter will have no +effect. A value of @code{8} means the higher quality. For each increment of +that value the speed drops by a factor of approximately 2. Default value is +@code{3}. + +@item qp +Force a constant quantization parameter. If not set, the filter will use the QP +from the video stream (if available). +@end table + @anchor{vidstabdetect} @section vidstabdetect |