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Rostislav Pehlivanov 20962b567b lpc: create a simplified Levinson-Durbin LPC handling float samples 
This commit simply duplicates the functionality of ff_lpc_calc_coefs()
for the case of a Levinson-Durbin LPC with the only difference being
that floating point samples are accepted and the resulting coefficients
are raw and unquantized.
The motivation behind doing this is the fact that the AAC encoder
requires LPC in TNS and LTP and converting non-normalized floating
point coefficients to int32_t using SWR and again back for the LPC
coefficients was very impractical.
The current LPC interfaces were designed for int32_t in mind possibly
because FLAC and ALAC use this type for most internal operations.
The mathematics in case of floats remains of course identical.

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
2015-08-29 06:14:13 +01:00
compat use a wrapper script to call MS link.exe to avoid mixing with /usr/bin/link.exe 2015-07-24 20:02:32 +02:00
doc doc/examples/filtering_video: better demo ffmpeg filters; demos chaining the filters 2015-08-28 12:53:35 +02:00
libavcodec lpc: create a simplified Levinson-Durbin LPC handling float samples 2015-08-29 06:14:13 +01:00
libavdevice avdevice/lavfi: fix self assignment warning 2015-08-23 20:00:03 +02:00
libavfilter avfilter/vf_dejudder: use the name 's' for the pointer to the private context 2015-08-28 19:05:19 +00:00
libavformat avformat/segment: atomically update list if possible 2015-08-28 00:09:56 +02:00
libavresample x86inc: Drop SECTION_TEXT macro 2015-08-04 20:13:09 +02:00
libavutil Merge commit 'e23f84d965' 2015-08-24 10:40:24 +02:00
libpostproc avutil/x86/asm: rename REG_SP to REG_sp 2015-08-22 02:56:53 +02:00
libswresample swresample/dither: use integer arithmetic 2015-08-23 23:19:31 +02:00
libswscale swscale: Silence an unused variable warning 2015-08-25 17:40:06 -07:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests checkasm: Fix floating point arguments on 64-bit Windows 2015-08-25 19:34:46 +02:00
tools graph2dot: use avfilter_pad_get_name accessor function 2015-08-20 22:38:01 +02:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore doc/examples: rename avio_list_dir -> avio_dir_cmd 2015-08-16 02:16:47 +02:00
arch.mak use mmi instead of loongson3 as simd-optimization flag 2015-07-07 03:46:57 +02:00
Changelog Changelog: Add VDPAU HEVC to the list 2015-08-28 08:16:39 -07:00
cmdutils.c ffmpeg: replace deprecated av_log_ask_for_sample with av_log 2015-08-12 00:14:13 +02:00
cmdutils.h cmdutils: remove sws_opts usage, simplify code 2015-08-08 16:51:25 +02:00
cmdutils_common_opts.h opts: add list device sources/sinks options 2014-10-25 20:20:31 +02:00
cmdutils_opencl.c OpenCL: Avoid potential buffer overflow in cmdutils_opencl.c 2015-04-28 12:18:23 +02:00
common.mak Merge commit '3ae0e721c7' 2015-07-22 16:30:37 +02:00
configure configure: Do not let the webm muxer suggest external libraries. 2015-08-28 06:03:58 +02:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS CREDITS: redirect to Git log, remove current outdated content 2013-01-31 18:02:52 +01:00
ffmpeg.c ffmpeg: force 128k default audio bitrate if nothing is specified and there is no specific default 2015-08-28 23:07:12 +02:00
ffmpeg.h ffmpeg: switch swscale option handling to AVDictionary similar to what the other subsystems use 2015-08-08 14:44:15 +02:00
ffmpeg_dxva2.c ffmpeg_dxva2: call GetDesktopWindow() in place of GetShellWindow() 2015-06-03 16:25:08 +02:00
ffmpeg_filter.c lavfi: fix compilation with FF_API_OLD_FILTER_OPTS=0. 2015-08-18 22:22:49 -04:00
ffmpeg_opt.c Put remaining pieces of CODEC_FLAG_EMU_EDGE under FF_API_EMU_EDGE. 2015-08-28 14:40:59 -04:00
ffmpeg_vdpau.c ffmpeg_vdpau: Ignore decoder's max supported level 2015-08-16 15:02:33 -07:00
ffmpeg_videotoolbox.c avcodec: add new Videotoolbox hwaccel. 2015-08-03 10:12:10 +02:00
ffplay.c Put remaining pieces of CODEC_FLAG_EMU_EDGE under FF_API_EMU_EDGE. 2015-08-28 14:40:59 -04:00
ffprobe.c ffprobe: check av_asprintf() for failure 2015-06-13 01:45:27 +02:00
ffserver.c ffserver: cast PID to int64_t before printing 2015-08-21 15:47:54 +02:00
ffserver_config.c ffserver: use -b instead of -ab for setting audio bitrate. 2015-08-28 14:59:58 -04:00
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 build: add LDLIBFLAGS 2015-07-08 14:35:02 +02:00
LICENSE.md avfilter/vf_removegrain: add x86 and x86_64 SSE2 functions 2015-07-14 23:50:50 +00:00
MAINTAINERS MAINTAINERS: add myself as an AAC encoder maintainer 2015-08-21 19:44:15 +01:00
Makefile avcodec: add new Videotoolbox hwaccel. 2015-08-03 10:12:10 +02:00
README.md README: add ffserver 2015-02-12 11:59:22 +01:00
RELEASE RELEASE: update to 2.7.git 2015-07-19 17:52:31 -03:00
version.sh version.sh: Print versions based on the last git tag for release branches 2014-07-28 15:44:59 +02:00

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.