| FFMPEG-SCALER(1) FFMPEG-SCALER(1) | |
| NAME | |
| ffmpeg-scaler - FFmpeg video scaling and pixel format converter | |
| DESCRIPTION | |
| The FFmpeg rescaler provides a high-level interface to the libswscale | |
| library image conversion utilities. In particular it allows one to | |
| perform image rescaling and pixel format conversion. | |
| SCALER OPTIONS | |
| The video scaler supports the following named options. | |
| Options may be set by specifying -option value in the FFmpeg tools, | |
| with a few API-only exceptions noted below. For programmatic use, they | |
| can be set explicitly in the "SwsContext" options or through the | |
| libavutil/opt.h API. | |
| sws_flags | |
| Set the scaler flags. This is also used to set the scaling | |
| algorithm. Only a single algorithm should be selected. Default | |
| value is bicubic. | |
| It accepts the following values: | |
| fast_bilinear | |
| Select fast bilinear scaling algorithm. | |
| bilinear | |
| Select bilinear scaling algorithm. | |
| bicubic | |
| Select bicubic scaling algorithm. | |
| experimental | |
| Select experimental scaling algorithm. | |
| neighbor | |
| Select nearest neighbor rescaling algorithm. | |
| area | |
| Select averaging area rescaling algorithm. | |
| bicublin | |
| Select bicubic scaling algorithm for the luma component, | |
| bilinear for chroma components. | |
| gauss | |
| Select Gaussian rescaling algorithm. | |
| sinc | |
| Select sinc rescaling algorithm. | |
| lanczos | |
| Select Lanczos rescaling algorithm. The default width (alpha) | |
| is 3 and can be changed by setting "param0". | |
| spline | |
| Select natural bicubic spline rescaling algorithm. | |
| print_info | |
| Enable printing/debug logging. | |
| accurate_rnd | |
| Enable accurate rounding. | |
| full_chroma_int | |
| Enable full chroma interpolation. | |
| full_chroma_inp | |
| Select full chroma input. | |
| bitexact | |
| Enable bitexact output. | |
| srcw (API only) | |
| Set source width. | |
| srch (API only) | |
| Set source height. | |
| dstw (API only) | |
| Set destination width. | |
| dsth (API only) | |
| Set destination height. | |
| src_format (API only) | |
| Set source pixel format (must be expressed as an integer). | |
| dst_format (API only) | |
| Set destination pixel format (must be expressed as an integer). | |
| src_range (boolean) | |
| If value is set to 1, indicates source is full range. Default value | |
| is 0, which indicates source is limited range. | |
| dst_range (boolean) | |
| If value is set to 1, enable full range for destination. Default | |
| value is 0, which enables limited range. | |
| param0, param1 | |
| Set scaling algorithm parameters. The specified values are specific | |
| of some scaling algorithms and ignored by others. The specified | |
| values are floating point number values. | |
| sws_dither | |
| Set the dithering algorithm. Accepts one of the following values. | |
| Default value is auto. | |
| auto | |
| automatic choice | |
| none | |
| no dithering | |
| bayer | |
| bayer dither | |
| ed error diffusion dither | |
| a_dither | |
| arithmetic dither, based using addition | |
| x_dither | |
| arithmetic dither, based using xor (more random/less apparent | |
| patterning that a_dither). | |
| alphablend | |
| Set the alpha blending to use when the input has alpha but the | |
| output does not. Default value is none. | |
| uniform_color | |
| Blend onto a uniform background color | |
| checkerboard | |
| Blend onto a checkerboard | |
| none | |
| No blending | |
| SEE ALSO | |
| ffmpeg(1), ffplay(1), ffprobe(1), libswscale(3) | |
| AUTHORS | |
| The FFmpeg developers. | |
| For details about the authorship, see the Git history of the project | |
| (https://git.ffmpeg.org/ffmpeg), e.g. by typing the command git log in | |
| the FFmpeg source directory, or browsing the online repository at | |
| <https://git.ffmpeg.org/ffmpeg>. | |
| Maintainers for the specific components are listed in the file | |
| MAINTAINERS in the source code tree. | |
| FFMPEG-SCALER(1) | |