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Takeshi (Kesh) Ikuma 65f96a965a avfilter/vf_curves: add PCHIP interpolator and interp option summary: This patch modifies the `curves` filter with new `interp` option to let user pick the existing natural cubic spline interpolation and the new PCHIP interapolation. reason: The natural cubic spline does not impose monotonicity between the keypoints. As such, the fitted curve may vary wildly against user's intension. The PCHIP interpolation is not as smooth as the natural spline but guarantees the monotonicity. Providing both options enhances users experience (e.g., reduces the number of keypoints to realize the desired curve). See the related bug report for the example of an ill-interpolated curve. alternate solution: Both Photoshop and GIMP appear to use monotonic interpolation in their curve tools, which were the models for this filter. As such, an alternate solution is to drop the natural spline and go without the `interp` option. related bug report: https://trac.ffmpeg.org/ticket/9947 (filed by myself) Signed-off-by: Takeshi (Kesh) Ikuma <tikuma@hotmail.com>		2 years ago
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doc	avfilter/vf_curves: add PCHIP interpolator and interp option	2 years ago
ffbuild	…
fftools	fftools/ffmpeg: rename read_file() to avoid conflict with libass	2 years ago
libavcodec	avocdec/cbs_internal: Rename CBS_MAX_UNIT_TYPES->CBS_MAX_LIST_UNIT_TYPES	2 years ago
libavdevice	…
libavfilter	avfilter/vf_curves: add PCHIP interpolator and interp option	2 years ago
libavformat	avformat/mj2kdec: Remove always-true #if CONFIG_MJPEG_2000_DEMUXER	2 years ago
libavutil	avutil/samplefmt: document missing argument	2 years ago
libpostproc	…
libswresample	…
libswscale	…
presets	…
tests	ffmpeg: Add display_{rotation, hflip, vflip} options	2 years ago
tools	tools/target_dec_fuzzer: Adjust threshold for FFV1	2 years ago
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CONTRIBUTING.md	…
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COPYING.LGPLv2.1	…
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Changelog	avcodec: ViewQuest VQC decoder	2 years ago
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configure	avcodec/librav1e: support AV_CODEC_CAP_ENCODER_RECON_FRAME	2 years ago

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

libavcodec provides implementation of a wider range of codecs.
libavformat implements streaming protocols, container formats and basic I/O access.
libavutil includes hashers, decompressors and miscellaneous utility functions.
libavfilter provides means to alter decoded audio and video through a directed graph of connected filters.
libavdevice provides an abstraction to access capture and playback devices.
libswresample implements audio mixing and resampling routines.
libswscale implements color conversion and scaling routines.

Tools

ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
ffplay is a minimalistic multimedia player.
ffprobe is a simple analysis tool to inspect multimedia content.
Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.