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Claudio Freire 62dfe1d40d avcodec/aacenc_is: replace pow(x, 0.75) by x/sqrtf(sqrtf(x)) This is quite an accurate approximation; testing shows ~ 2ulp error in the floating point result. Tested with FATE. Alternatively, if one wants "full accuracy", one can use powf, or sqrt instead of sqrtf. With powf, one gets 1 ulp error (theoretically should be 0, as 0.75 is exactly representable) on GNU libm, with sqrt, 0 ulp error. Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com> Abstracted into pos_pow34 utility function Signed-off-by: Claudio Freire <klaussfreire@gmail.com>		2016-01-14 00:38:22 -03:00
compat	…
doc	avfilter/avf_showspectrum: add posibility to display phase	2016-01-12 21:21:50 +01:00
libavcodec	avcodec/aacenc_is: replace pow(x, 0.75) by x/sqrtf(sqrtf(x))	2016-01-14 00:38:22 -03:00
libavdevice	Correct two build/built typos	2016-01-11 20:53:11 -08:00
libavfilter	avfilter/avf_showspectrum: reduce number of operations	2016-01-12 21:21:50 +01:00
libavformat	avformat/hls: forbid all protocols except http(s) & file	2016-01-14 00:18:00 +01:00
libavresample	Merge commit 'cc4c24208159200b7aff5b5c313903c7f23fa345'	2016-01-02 10:13:58 +01:00
libavutil	lavu/libm: add isfinite fallback	2016-01-13 20:00:19 -05:00
libpostproc	…
libswresample	swr/resample: use av_clip_int16 instead of av_clip	2015-12-24 11:29:52 -08:00
libswscale	swscale/utils: Use normal bilinear scaler if fast cannot be used due to tiny dimensions	2016-01-04 23:54:11 +01:00
presets	…
tests	AAC encoder: fix I/S relative error evaluation	2016-01-13 05:28:34 -03:00
tools	avcodec: Remove libstagefright	2016-01-06 16:43:06 +00:00
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CREDITS	…
Changelog	avcodec: Remove libstagefright	2016-01-06 16:43:06 +00:00
INSTALL.md	…
LICENSE.md	…
MAINTAINERS	avcodec: Remove libstagefright	2016-01-06 16:43:06 +00:00
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README.md	…
RELEASE	…
arch.mak	…
cmdutils.c	…
cmdutils.h	…
cmdutils_common_opts.h	…
cmdutils_opencl.c	…
common.mak	…
configure	lavu/libm: add isfinite fallback	2016-01-13 20:00:19 -05:00
ffmpeg.c	ffmpeg: check fclose return values	2016-01-07 16:57:37 -08:00
ffmpeg.h	ffmpeg: use lavf API for applying bitstream filters	2015-12-28 08:34:30 -06:00
ffmpeg_dxva2.c	…
ffmpeg_filter.c	…
ffmpeg_opt.c	ffmpeg: use lavf API for applying bitstream filters	2015-12-28 08:34:30 -06:00
ffmpeg_qsv.c	…
ffmpeg_vdpau.c	…
ffmpeg_videotoolbox.c	…
ffplay.c	Revert "ffplay: Fix auto insertion point of rotation filter"	2015-12-28 03:44:31 +01:00
ffprobe.c	ffprobe: avoid unnecessary pow and exp2 calls	2015-12-29 08:59:16 -08:00
ffserver.c	ffserver: Cast time_t value when using it in a format string.	2015-12-29 16:00:34 +01:00
ffserver_config.c	…
ffserver_config.h	…
library.mak	…
version.sh	…

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 a mean to alter decoded Audio and Video through chain of 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.
ffserver is a multimedia streaming server for live broadcasts.
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. Few developers follow pull requests so they will likely be ignored.