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Andreas Cadhalpun 30e6abd1a8 webp: ensure that each transform is only used once 
According to the WebP Lossless Bitstream Specification
"each transform is allowed to be used only once".

If a transform is more than once this can lead to memory
corruption.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
2015-03-19 21:03:13 +01:00
compat w32pthreads: use the condition variable API directly when targeting newer versions of Windows 2014-10-10 11:27:30 +03:00
doc doc: fate: remove outdated SSH key fingerprint 2015-03-16 11:55:47 +01:00
libavcodec webp: ensure that each transform is only used once 2015-03-19 21:03:13 +01:00
libavdevice xcbgrab: Check av_strdup() allocation 2015-03-12 15:29:59 +00:00
libavfilter formats: Check memory allocations 2015-03-12 17:46:47 +00:00
libavformat movenc: write the display transform matrix 2015-03-19 21:02:59 +01:00
libavresample libavresample: NEON optimized FIR audio resampling 2015-02-21 22:08:39 +02:00
libavutil Replace a few leftover instances of enum PixelFormat with enum AVPixelFormat 2015-03-17 23:53:33 +02:00
libswscale libswscale: fix compiler warnings enumerated type mixed with another type 2015-03-15 18:29:22 +01:00
presets presets: spelling error in libvpx 1080p50_60 2011-10-22 00:28:56 +02:00
tests fate: Move tdsc to the appropriate screen capture file 2015-03-17 13:36:10 +00:00
tools ismindex: Calculate the pts duration of trun atoms, not the dts duration 2015-03-19 10:27:22 +02:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore Ignore generated file tools/sidxindex. 2015-02-02 20:09:27 +01:00
arch.mak aarch64: add armv8 CPU flag 2014-04-06 21:18:49 +02:00
avconv_dxva2.c avconv_dxva2: add hevc support 2015-01-27 09:06:05 +01:00
avconv_filter.c avconv: fix leak in filter error 2014-10-17 09:55:46 +01:00
avconv_opt.c avconv: Check rc_override memory allocation 2015-02-17 11:27:41 -05:00
avconv_vda.c avconv: Support VDA hwaccel 2014-05-11 15:00:03 +02:00
avconv_vdpau.c avconv_vdpau: allocate video surface of VDPAU-specified size 2014-12-25 20:47:49 +01:00
avconv.c avconv: do not abort immediately if initializing hwaccel fails 2015-03-10 07:40:11 +01:00
avconv.h avconv: do not use the stream codec context for encoding 2014-06-01 08:33:21 +02:00
avplay.c avplay: Check format allocation inside decode_thread() 2015-02-17 11:27:41 -05:00
avprobe.c avprobe: Export coded_{width,height} in -show_streams 2015-03-08 20:41:50 +00:00
Changelog dca: Support for XLL (lossless extension) 2015-03-15 14:51:36 +01:00
cmdutils_common_opts.h avplay: Accept cpuflags option 2013-10-22 10:49:31 +02:00
cmdutils.c cmdutils: update copyright year to 2015. 2015-01-04 13:22:25 +02:00
cmdutils.h cmdutils: Mark exit_program as av_noreturn 2014-03-28 00:40:43 +01:00
common.mak build: export library dependencies in ${name}_FFLIBS 2014-05-20 00:43:51 +02:00
configure configure: Disable shift operator precedence warnings with MSVC 2015-03-17 11:59:31 +01:00
COPYING.GPLv2 Rename COPYING.GPL --> COPYING.GPLv2 and COPYING.LGPL --> COPYING.LGPLv2.1. 2009-06-05 09:51:31 +00:00
COPYING.GPLv3 Add configure option to upgrade (L)GPL to version 3. 2009-06-05 11:04:03 +00:00
COPYING.LGPLv2.1 cosmetics: Delete empty lines at end of file. 2012-02-09 12:26:45 +01:00
COPYING.LGPLv3 Add configure option to upgrade (L)GPL to version 3. 2009-06-05 11:04:03 +00:00
CREDITS partially rename FFmpeg to Libav 2011-03-16 21:54:39 +01:00
INSTALL doc: clarify configure features 2011-04-07 02:54:12 +02:00
library.mak build: Support executable only ldflags 2014-07-21 22:18:35 +02:00
LICENSE license: Mention that vf_interlace is GPL, not LGPL 2014-08-28 19:47:43 +02:00
Makefile configure: add support for neon intrinsics 2014-07-21 23:18:29 +02:00
README doc: Add more information in the README 2014-08-16 00:49:22 +02:00
README.md doc: Add more information in the README 2014-08-16 00:49:22 +02:00
RELEASE Make the RELEASE file match with the most recent tag 2014-12-01 07:51:14 -05:00
version.sh Drop git- prefix from version labels 2011-06-19 19:41:23 +01:00

README.md

Libav

Libav 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.
  • libavresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • avconv is a command line toolbox to manipulate, convert and stream multimedia content.
  • avplay is a minimalistic multimedia player.
  • avprobe is a simple analisys tool to inspect multimedia content.
  • 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

Conding examples are available in the doc/example directory.

License

Libav codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.