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Muhammad Faiz 1e69ac9246 avfilter/avf_showcqt: cqt_calc optimization on x86 
on x86_64:
        time    PSNR
plain   3.303   inf
SSE     1.649   107.087535
SSE3    1.632   107.087535
AVX     1.409   106.986771
FMA3    1.265   107.108437

on x86_32 (PSNR compared to x86_64 plain):
        time    PSNR
plain   7.225   103.951979
SSE     1.827   105.859282
SSE3    1.819   105.859282
AVX     1.533   105.997661
FMA3    1.384   105.885377

FMA4 test is not available

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
2016-06-08 16:09:43 +07:00
compat Merge commit '6bb99757b780144d9fa27cdce09d3621e1a0ed43' 2016-05-08 23:02:33 +01:00
doc avcodec: add BitJazz SheerVideo decoder 2016-06-07 21:38:49 +02:00
libavcodec avcodec/h264: Fix off by 1 context count 2016-06-07 23:32:34 +02:00
libavdevice avdevice/dshow: Fix frame rate 2016-06-07 02:32:13 +02:00
libavfilter avfilter/avf_showcqt: cqt_calc optimization on x86 2016-06-08 16:09:43 +07:00
libavformat avformat/matroskadec: force 48kHz sample rate when rescaling Opus inital padding 2016-06-07 20:32:25 -03:00
libavresample Merge commit '01621202aad7e27b2a05c71d9ad7a19dfcbe17ec' 2016-05-09 16:25:28 +01:00
libavutil avutil/frame: Assert that width/height/channels is 0 for the destination of av_frame*_ref() 2016-06-05 17:12:35 +02:00
libpostproc postproc: fix unaligned access 2016-02-23 15:50:28 +01:00
libswresample swresample/resample: Fix division by 0 with tap_count=1 2016-05-16 05:10:21 +02:00
libswscale Merge commit '01621202aad7e27b2a05c71d9ad7a19dfcbe17ec' 2016-05-09 16:25:28 +01:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests avcodec/mpeg4videodec: Fix default low_delay flag value if not coded 2016-06-05 20:55:09 +02:00
tools fix some a/an typos 2016-03-28 14:13:17 -08:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore Merge commit '06edef3d5e072ef3c4face9ce946d2d9c36cc477' 2016-05-12 14:04:02 +01:00
.travis.yml Merge commit 'eda183287489b2c705843aa373a19c4e46fb2fec' 2015-11-22 17:12:24 +00:00
arch.mak mips: rename mipsdspr1 to mipsdsp 2015-12-04 02:35:42 +01:00
Changelog avcodec: add BitJazz SheerVideo decoder 2016-06-07 21:38:49 +02:00
cmdutils_common_opts.h opts: add list device sources/sinks options 2014-10-25 20:20:31 +02:00
cmdutils_opencl.c all: use FFDIFFSIGN to resolve possible undefined behavior in comparators 2015-11-03 16:28:30 -05:00
cmdutils.c cmdutils: realign for some additional filters with very long name 2016-02-06 12:48:51 +01:00
cmdutils.h fate/source: Do not use GNU extensions in sed 2016-02-13 07:59:00 -08:00
common.mak Merge commit '3dfbf32b95ae69a9b15cd4912bc1c68fa16b4093' 2016-04-21 16:03:43 +01:00
configure Seperate x264rgb encoder and only enable when its actually supported 2016-06-05 17:04:29 +02:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1 cosmetics: Delete empty lines at end of file. 2012-02-09 12:26:45 +01:00
COPYING.LGPLv3
CREDITS CREDITS: redirect to Git log, remove current outdated content 2013-01-31 18:02:52 +01:00
ffmpeg_dxva2.c ffmpeg_dxva2: add a profile check for hevc 2016-02-15 12:34:19 +01:00
ffmpeg_filter.c ffmpeg_filter: Fix AVBufferSrcParameters leak 2016-05-19 00:10:27 +02:00
ffmpeg_opt.c Merge commit '5d273d3efac340ef8de445c955ff44c7abed4e8f' 2016-05-08 22:39:39 +01:00
ffmpeg_qsv.c Merge commit 'fb472e1a11a4e0caed2c3c91da01ea8e35d9e3f8' 2015-10-22 16:18:02 +02:00
ffmpeg_vaapi.c Merge commit '5d273d3efac340ef8de445c955ff44c7abed4e8f' 2016-05-08 22:39:39 +01:00
ffmpeg_vdpau.c ffmpeg_vdpau: Free ctx on error path 2016-03-03 16:41:11 +01:00
ffmpeg_videotoolbox.c ffmpeg/videotoolbox: protect UTGetOSTypeFromString on both VDA and VT 2015-10-15 10:22:31 +02:00
ffmpeg.c ffmpeg: Check that r_frame_rate is set before attempting to use it 2016-05-16 14:23:49 +02:00
ffmpeg.h Merge commit '5d273d3efac340ef8de445c955ff44c7abed4e8f' 2016-05-08 22:39:39 +01:00
ffplay.c ffplay: simplify display code 2016-05-31 00:33:50 +02:00
ffprobe.c ffprobe: Don't try and decode things that have no dec_ctx 2016-04-12 17:24:07 +01:00
ffserver_config.c ffserver: NoVideo and NoAudio flags weren't cleared between streams. 2016-02-21 22:29:15 +01:00
ffserver_config.h ffserver: Use singlejpeg muxer for jpeg 2015-06-08 03:36:22 +02:00
ffserver.c ffserver: fixed deallocation bug in build_feed_streams 2016-05-27 00:22:06 +02:00
INSTALL.md INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
library.mak library.mak: Put -Umain back for tests 2016-06-01 16:32:08 +02:00
LICENSE.md LICENSE: Thorough editing 2016-02-28 08:19:44 -08:00
MAINTAINERS MAINTAINERS: Remove myself 2016-06-02 09:25:37 -08:00
Makefile Merge commit '06edef3d5e072ef3c4face9ce946d2d9c36cc477' 2016-05-12 14:04:02 +01:00
README.md README: replace http with https 2015-10-06 13:27:29 +02:00
RELEASE RELEASE: Update to 3.0.git 2016-02-15 10:20:33 -08:00
version.sh version.sh: Fix spurious rebuilds. 2016-03-10 09:53:10 +01:00

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.