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@ -172,7 +172,7 @@ terminated when the next special character (belonging to the set |
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The name and arguments of the filter are optionally preceded and |
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The name and arguments of the filter are optionally preceded and |
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followed by a list of link labels. |
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followed by a list of link labels. |
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A link label allows to name a link and associate it to a filter output |
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A link label allows one to name a link and associate it to a filter output |
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or input pad. The preceding labels @var{in_link_1} |
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or input pad. The preceding labels @var{in_link_1} |
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... @var{in_link_N}, are associated to the filter input pads, |
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... @var{in_link_N}, are associated to the filter input pads, |
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the following labels @var{out_link_1} ... @var{out_link_M}, are |
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the following labels @var{out_link_1} ... @var{out_link_M}, are |
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@ -3921,7 +3921,7 @@ The high threshold selects the "strong" edge pixels, which are then |
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connected through 8-connectivity with the "weak" edge pixels selected |
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connected through 8-connectivity with the "weak" edge pixels selected |
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by the low threshold. |
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by the low threshold. |
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@var{low} and @var{high} threshold values must be choosen in the range |
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@var{low} and @var{high} threshold values must be chosen in the range |
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[0,1], and @var{low} should be lesser or equal to @var{high}. |
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[0,1], and @var{low} should be lesser or equal to @var{high}. |
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Default value for @var{low} is @code{20/255}, and default value for @var{high} |
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Default value for @var{low} is @code{20/255}, and default value for @var{high} |
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@ -5238,7 +5238,7 @@ Set progressive threshold. |
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Deinterleave or interleave fields. |
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Deinterleave or interleave fields. |
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This filter allows to process interlaced images fields without |
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This filter allows one to process interlaced images fields without |
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deinterlacing them. Deinterleaving splits the input frame into 2 |
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deinterlacing them. Deinterleaving splits the input frame into 2 |
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fields (so called half pictures). Odd lines are moved to the top |
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fields (so called half pictures). Odd lines are moved to the top |
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half of the output image, even lines to the bottom half. |
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half of the output image, even lines to the bottom half. |
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@ -6860,7 +6860,7 @@ rotate=A*sin(2*PI/T*t) |
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@end example |
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@end example |
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@item |
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@item |
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Rotate the video, output size is choosen so that the whole rotating |
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Rotate the video, output size is chosen so that the whole rotating |
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input video is always completely contained in the output: |
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input video is always completely contained in the output: |
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@example |
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@example |
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rotate='2*PI*t:ow=hypot(iw,ih):oh=ow' |
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rotate='2*PI*t:ow=hypot(iw,ih):oh=ow' |
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@ -6983,7 +6983,7 @@ Default value is @samp{0}. |
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@item flags |
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@item flags |
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Set libswscale scaling flags. See |
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Set libswscale scaling flags. See |
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@ref{sws_flags,,the ffmpeg-scaler manual,ffmpeg-scaler} for the |
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@ref{sws_flags,,the ffmpeg-scaler manual,ffmpeg-scaler} for the |
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complete list of values. If not explictly specified the filter applies |
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complete list of values. If not explicitly specified the filter applies |
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the default flags. |
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the default flags. |
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@item size, s |
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@item size, s |
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@ -7827,7 +7827,7 @@ Produce 8x8 PNG tiles of all keyframes (@option{-skip_frame nokey}) in a movie: |
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ffmpeg -skip_frame nokey -i file.avi -vf 'scale=128:72,tile=8x8' -an -vsync 0 keyframes%03d.png |
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ffmpeg -skip_frame nokey -i file.avi -vf 'scale=128:72,tile=8x8' -an -vsync 0 keyframes%03d.png |
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@end example |
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@end example |
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The @option{-vsync 0} is necessary to prevent @command{ffmpeg} from |
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The @option{-vsync 0} is necessary to prevent @command{ffmpeg} from |
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duplicating each output frame to accomodate the originally detected frame |
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duplicating each output frame to accommodate the originally detected frame |
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rate. |
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rate. |
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@item |
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@item |
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@ -8424,7 +8424,7 @@ Set dithering to reduce the circular banding effects. Default is @code{1} |
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(enabled). |
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(enabled). |
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@item aspect |
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@item aspect |
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Set vignette aspect. This setting allows to adjust the shape of the vignette. |
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Set vignette aspect. This setting allows one to adjust the shape of the vignette. |
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Setting this value to the SAR of the input will make a rectangular vignetting |
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Setting this value to the SAR of the input will make a rectangular vignetting |
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following the dimensions of the video. |
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following the dimensions of the video. |
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@ -8933,7 +8933,7 @@ horizontally, vertically, or diagonally adjacent. |
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At each interaction the grid evolves according to the adopted rule, |
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At each interaction the grid evolves according to the adopted rule, |
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which specifies the number of neighbor alive cells which will make a |
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which specifies the number of neighbor alive cells which will make a |
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cell stay alive or born. The @option{rule} option allows to specify |
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cell stay alive or born. The @option{rule} option allows one to specify |
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the rule to adopt. |
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the rule to adopt. |
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This source accepts the following options: |
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This source accepts the following options: |
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@ -10353,7 +10353,7 @@ Note that when the movie is looped the source timestamps are not |
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changed, so it will generate non monotonically increasing timestamps. |
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changed, so it will generate non monotonically increasing timestamps. |
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@end table |
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@end table |
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This filter allows to overlay a second video on top of main input of |
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This filter allows one to overlay a second video on top of main input of |
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a filtergraph as shown in this graph: |
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a filtergraph as shown in this graph: |
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@example |
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@example |
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input -----------> deltapts0 --> overlay --> output |
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input -----------> deltapts0 --> overlay --> output |
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Andreas Cadhalpun
11 years ago
committed by
Michael Niedermayer