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Gilles Chanteperdrix dcf19008a6 avfilter/af_volume: fix precision=fixed and volume=0 case 
When precision is fixed and volume is 0, filter_frame does not
perform any operation on the output buffer. This works if the
output buffer has been allocated and zeroed with ff_get_audio_buffer
but not if the input buffer is used as output buffer.

Fix this by not using the input buffer as output buffer if
precision is fixed and volume is 0.

Signed-off-by: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-03-01 02:37:56 +01:00
compat compat/avisynth/windowsPorts/windows2linux: Add () to protect macro arguments 2015-02-18 01:49:35 +01:00
doc Merge commit '990e4a6639d0714198583c2812b1074b5751898f' 2015-03-01 00:30:20 +01:00
libavcodec Merge commit '71f1ad37d858b810b71a4af1c25771beaa50b27b' 2015-03-01 00:06:42 +01:00
libavdevice Merge commit '802987f8c7033ec8b82b35438d3822cf7f761166' 2015-03-01 00:17:36 +01:00
libavfilter avfilter/af_volume: fix precision=fixed and volume=0 case 2015-03-01 02:37:56 +01:00
libavformat Merge commit '4f6cd883f06f7893a2b60a41e7a4f8ae633dac2f' 2015-03-01 01:31:49 +01:00
libavresample Merge commit '12655c48049f9a52e5504bde90fe738862b0ff08' 2015-02-22 00:06:23 +01:00
libavutil avutil/imgutils: correctly check for negative SAR components 2015-02-28 21:57:11 +01:00
libpostproc postproc: mark alloc/free context functions as av_cold 2015-02-27 16:15:31 +01:00
libswresample swresample: Add prefix to soxr_resampler 2015-02-27 19:20:43 +01:00
libswscale swscale: Add prefix to updateMMXDitherTables() 2015-02-27 19:23:46 +01:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests tests: add paletteuse test 2015-02-26 14:20:03 +01:00
tools tools/graph2dot: Check for av_malloc() failure 2015-02-22 22:51:13 +01:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore Merge commit '11e05533170485b593974cf90916425a0188e7bd' 2015-02-02 21:16:15 +01:00
arch.mak Merge commit '8675bcb0addb1c7fb0b04682d1f3f95d5b8dae14' 2014-04-07 02:15:18 +02:00
Changelog Merge commit '04a1be8e28e81f3967eace7705343c450616cc95' 2015-02-24 21:55:46 +01:00
cmdutils_common_opts.h opts: add list device sources/sinks options 2014-10-25 20:20:31 +02:00
cmdutils_opencl.c cmdutils_opencl: Use av_malloc_array() 2014-07-01 03:49:36 +02:00
cmdutils.c cmdutils: fix success path 2015-02-11 17:28:11 +01:00
cmdutils.h opts: add list device sources/sinks options 2014-10-25 20:20:31 +02:00
common.mak Makefile: improve DBG option for asm 2015-02-21 03:23:55 +01:00
configure Merge commit '990e4a6639d0714198583c2812b1074b5751898f' 2015-03-01 00:30:20 +01:00
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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 hevc support 2015-01-27 12:37:34 +01:00
ffmpeg_filter.c ffmpeg: fix accurate seeking with -copyts 2014-11-24 17:31:26 +01:00
ffmpeg_opt.c ffmpeg: allow to set the thread message queue size. 2015-02-26 19:19:56 +01:00
ffmpeg_vda.c Merge commit '1839fafa951308237c4672ffd9a94f927b26eac7' 2014-05-12 02:44:28 +02:00
ffmpeg_vdpau.c Merge commit '1f9237f2ac46dfbed1bfa1f4f0f1314c2a1d62ec' 2014-12-27 13:26:38 +01:00
ffmpeg.c ffmpeg: Fix -vstats when coded_frame is not set 2015-02-28 12:33:44 +01:00
ffmpeg.h ffmpeg: allow to set the thread message queue size. 2015-02-26 19:19:56 +01:00
ffplay.c Merge commit '733f4b05f0e120ddd0393b23f2b6d9106cf922e4' 2015-02-17 21:16:34 +01:00
ffprobe.c Merge commit 'bf704132a51f5d838365158331d4e535e1df4c8e' 2015-02-14 21:27:44 +01:00
ffserver_config.c ffserver_config: reflow add_codec() 2014-12-09 01:03:01 -03:00
ffserver_config.h ffserver: dont leak child arguments 2014-11-26 23:32:33 +01:00
ffserver.c ffserver: fix wrong indentation 2015-02-15 15:15:41 -03:00
INSTALL.md INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
library.mak x86/doc/Makefile: DBG=1 to preprocess external asm 2015-02-17 13:08:04 +01:00
LICENSE.md LICENSE.md: Formatting updates 2015-02-12 01:53:56 +01:00
MAINTAINERS MAINTAINERS: Add Oleksij as maintainer for DSS* 2015-02-20 16:17:46 +01:00
Makefile Makefile: add dependencies which require ffversion.h 2014-12-20 04:17:03 +01:00
README.md README: add ffserver 2015-02-12 11:59:22 +01:00
RELEASE RELEASE: Bump 2014-12-04 11:44:35 +01:00
RELEASE_NOTES avformat/mov: Disable XMP metadata by default 2014-12-11 21:47:37 +01:00
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.