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Ronald S. Bultje 726501a34e vp9: add 32x32 idct AVX2 implementation. 
About 1.8x speedup compared to AVX version for full IDCT. Other
sub-IDCT scenarios also see speedups. Full --bench output for
idct_32x32_add_{bpp}_${subidct}_${opt} (50k cycles):

nop: 16.5
vp9_inv_dct_dct_32x32_add_8_1_c: 2284.4
vp9_inv_dct_dct_32x32_add_8_1_sse2: 145.0
vp9_inv_dct_dct_32x32_add_8_1_ssse3: 137.4
vp9_inv_dct_dct_32x32_add_8_1_avx: 137.1
vp9_inv_dct_dct_32x32_add_8_1_avx2: 73.2
vp9_inv_dct_dct_32x32_add_8_2_c: 14680.8
vp9_inv_dct_dct_32x32_add_8_2_sse2: 2617.2
vp9_inv_dct_dct_32x32_add_8_2_ssse3: 982.9
vp9_inv_dct_dct_32x32_add_8_2_avx: 958.5
vp9_inv_dct_dct_32x32_add_8_2_avx2: 704.2
vp9_inv_dct_dct_32x32_add_8_4_c: 14443.1
vp9_inv_dct_dct_32x32_add_8_4_sse2: 2717.1
vp9_inv_dct_dct_32x32_add_8_4_ssse3: 965.7
vp9_inv_dct_dct_32x32_add_8_4_avx: 1000.7
vp9_inv_dct_dct_32x32_add_8_4_avx2: 717.1
vp9_inv_dct_dct_32x32_add_8_8_c: 14436.4
vp9_inv_dct_dct_32x32_add_8_8_sse2: 2671.8
vp9_inv_dct_dct_32x32_add_8_8_ssse3: 1038.5
vp9_inv_dct_dct_32x32_add_8_8_avx: 983.0
vp9_inv_dct_dct_32x32_add_8_8_avx2: 729.4
vp9_inv_dct_dct_32x32_add_8_16_c: 14614.7
vp9_inv_dct_dct_32x32_add_8_16_sse2: 2701.7
vp9_inv_dct_dct_32x32_add_8_16_ssse3: 1334.4
vp9_inv_dct_dct_32x32_add_8_16_avx: 1276.7
vp9_inv_dct_dct_32x32_add_8_16_avx2: 719.5
vp9_inv_dct_dct_32x32_add_8_32_c: 14363.6
vp9_inv_dct_dct_32x32_add_8_32_sse2: 2575.6
vp9_inv_dct_dct_32x32_add_8_32_ssse3: 2633.9
vp9_inv_dct_dct_32x32_add_8_32_avx: 2539.6
vp9_inv_dct_dct_32x32_add_8_32_avx2: 1395.0
2016-07-26 15:59:07 -04:00
compat Merge commit '6bb99757b7' 2016-05-08 23:02:33 +01:00
doc lavfi/curves: add plot option 2016-07-24 12:18:30 +02:00
libavcodec vp9: add 32x32 idct AVX2 implementation. 2016-07-26 15:59:07 -04:00
libavdevice lavd/libdc1394: distinguish between enumeration errors and no cameras found 2016-07-25 19:39:13 +02:00
libavfilter lavfi/curves: fix meaningless const int returned value 2016-07-26 21:22:27 +02:00
libavformat librtmp: Avoid an infiniloop setting connection arguments 2016-07-26 12:05:29 -07:00
libavresample Merge commit '535a742c26' 2016-06-27 17:56:47 +02:00
libavutil avutil/frame: access avframe fields directly in get_frame_defaults() 2016-07-25 17:37:18 -03:00
libpostproc Merge commit '535a742c26' 2016-06-27 17:56:47 +02:00
libswresample Merge commit '535a742c26' 2016-06-27 17:56:47 +02:00
libswscale Revert "PPC64: Add versions of functions in libswscale/input.c optimized for POWER8 VSX SIMD." 2016-07-11 10:15:05 -04:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests tests/fate: add dnxhr encoding tests 2016-07-24 12:31:07 +02:00
tools tools/patcheck: add a couple more common typos 2016-07-17 18:38:14 -03:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore Merge commit '6641819fee' 2016-06-26 15:43:05 +02:00
.travis.yml Merge commit 'eda1832874' 2015-11-22 17:12:24 +00:00
arch.mak mips: rename mipsdspr1 to mipsdsp 2015-12-04 02:35:42 +01:00
Changelog lavfi/selectivecolor: add 16-bit support 2016-07-24 15:29:37 +02:00
cmdutils.c avconv: switch to the new BSF API 2016-03-20 08:15:01 +01:00
cmdutils.h fate/source: Do not use GNU extensions in sed 2016-02-13 07:59:00 -08:00
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
common.mak Merge commit 'c5fd4b5061' 2016-06-27 19:39:46 +02:00
configure avformat: add an Ogg Video muxer 2016-07-20 22:32:43 -03:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
ffmpeg.c ffmpeg.c: copy video profile when using stream_copy 2016-07-23 03:52:38 +02:00
ffmpeg.h ffmpeg: Add cuvid hwaccel support 2016-06-10 16:31:23 +02:00
ffmpeg_cuvid.c ffmpeg: Add cuvid hwaccel support 2016-06-10 16:31:23 +02:00
ffmpeg_dxva2.c Merge commit '18c506e9e6' 2016-06-26 15:34:01 +02:00
ffmpeg_filter.c ffmpeg_filter: Fix AVBufferSrcParameters leak 2016-05-19 00:10:27 +02:00
ffmpeg_opt.c ffmpeg_opt: Delete duplicate “hwaccel_output_format” option. 2016-07-20 12:07:38 +02:00
ffmpeg_qsv.c Merge commit 'fb472e1a11' 2015-10-22 16:18:02 +02:00
ffmpeg_vaapi.c Merge commit '9f7590f4e4' 2016-06-26 15:36:27 +02:00
ffmpeg_vdpau.c Merge commit 'f72db3f2f3' 2016-06-26 15:29:39 +02:00
ffmpeg_videotoolbox.c ffmpeg/videotoolbox: protect UTGetOSTypeFromString on both VDA and VT 2015-10-15 10:22:31 +02:00
ffplay.c ffplay: Fix usage of private lavfi API 2016-06-29 12:53:01 +02:00
ffprobe.c ffprobe: add missing PROGRAM_STREAM_TAGS case 2016-07-26 19:22:47 +02:00
ffserver.c ffserver: fixed deallocation bug in build_feed_streams 2016-05-27 00:22:06 +02:00
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
INSTALL.md INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
library.mak Merge commit 'c5fd4b5061' 2016-06-27 19:39:46 +02:00
LICENSE.md avcodec: remove libutvideo wrapper support 2016-06-23 13:04:11 +02:00
MAINTAINERS MAINTAINERS: add myself to the project server 2016-07-23 11:13:06 +02:00
Makefile Merge commit '6641819fee' 2016-06-26 15:43:05 +02:00
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.