Libav github mirror, clone of git://git.libav.org/libav

Overview

Libav

Build Status

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.

Comments
  • Add ABGR map only if VA_FOURCC_ABGR is defined

    Add ABGR map only if VA_FOURCC_ABGR is defined

    I could not build libav with vaapi enabled, because my version of libva has no ABGR defined. So I added check for VA_FOURCC_ABGR to check if mapping to ABGR is possible.

    opened by elnormous 2
  • convert UTF-8 log back to UTF-16 before print it to windows cmd console

    convert UTF-8 log back to UTF-16 before print it to windows cmd console

    The log facility in libav will convert command line parameters to UTF-8 before processing them, but when printing those converted UTF-8 log to windows cmd.exe console, some charactors(such as chinese charactors in file names) will get displayed as garbage charactors because of the mismatch of ANSI encoding in the user's windows environment and UTF-8. This patch will convert them back to windows Unicode strings before output.

    opened by tsingakbar 2
  • To play HEVC TS streams which have stream_type 0x27.

    To play HEVC TS streams which have stream_type 0x27.

    Many HEVC TS Stream has stream_type as 0x27. even though gpac has same result, too. but current libav source cannot play those streams which have stream_type as 0x27. This is the modification for playing those HEVC TS Stream by avplay.

    opened by loganjeon 2
  • Bring Fork up to date.

    Bring Fork up to date.

    Let's hope I'm making it the right way, since I always confuse this. I just want to put the OS2World fork repository at the same level of the original source. I haven't make any change to the source code.

    opened by martiniturbide 1
  • Release/0.7

    Release/0.7

    Hi, developer

    I want to compile libav 0.7.7 version on windows msvc.

    I tried to compile it with Msys2 latest version, mingw32 latest version, MSVC. but I couldn't compile it.

    • MSVC compile configuration file has not --toolchain option. So, it fails when i execute this command for configuration. ./configure --toolchain=MSVC it throws error. (toolchain is not available)

    • Mingw32 when i compile this in mingw32 environment, it throws error. implicit declaration of function 'strncpy_is_forbidden_due_to_security_issues_use_av_strlcpy' [-Werror=implicit-function-declaration]

    Can you please help me?

    opened by devstar1988 1
  • [libavcodec] Fix missing control flow scopes or misleading indentation

    [libavcodec] Fix missing control flow scopes or misleading indentation

    I'm not 100% sure if the resolution is correct, but the indentation in the original code suggests that something else what intended. I'd welcome advice on the intended behaviour, and I will change the commit accordingly.

    opened by tkoeppe 1
  • Travis

    Travis

    Add support for Travis in libav. In this way we could have a first validation of patches, to later submit them to the ML.

    I think that this kind of tool automation could help newbies (like me) to contribute to libav.

    opened by ftomassetti 1
  • compilation fix: add missing includes

    compilation fix: add missing includes

    I'm compiling an old project using libav 0.6 on a recent ubuntu. I got some minor include errors when building libav 0.6.

    gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2

    opened by fabiencastan 1
  • Assert check which is related to a segfault I sometimes see with matroska

    Assert check which is related to a segfault I sometimes see with matroska

    I had problems with corrupt AvPacket object buf pointers in the avbin project. This is based on an older version of libav 46a86c61940ec8efdfa90b23f05c38ecc1184a34.

    The media is VP8 video in a matroska container. A segfault occurs in vp8_parser.c line 30:

    s->pict_type= (buf[0]&0x01) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
    

    buf is NULL. I traced the problem as far as the corrupt AvPacket. I am not sure anyone wants this patch, but it might make testing easier.

    opened by TimSC 1
  • mingw64 compilation fix

    mingw64 compilation fix

    Implemented patch by 'anguista' to fix mingw64 compilation, found on this forum post from Feb 2010: http://ffmpeg.arrozcru.org/forum/viewtopic.php?f=8&t=1225&p=4874#p4874

    My builds for mingw (win32), Linux (32- and 64-bit) and OS X (32- and 64-bit) all still work after this patch as well.

    opened by ghost 1
  • Replace lena.pnm

    Replace lena.pnm

    The new reference.pnm is a freely licensed replacement. The photo has been taken by Reinhard Tartler on August 28 2014, who allows redistribution and usage for any purpose.

    opened by siretart 0
  • Correct sws_getContext argument order

    Correct sws_getContext argument order

    The order of the picture formats is inverted in the output.c example. This corrects them, and also replaces numerous direct uses of PIX_FMT_YUV420 with one constant.

    opened by dankamongmen 0
  • Fixed segfault when decoding subtitles

    Fixed segfault when decoding subtitles

    This fixes a segfault (originally found in Movian, but traced to libav) when decoding subtitles because only an array of rects is allocated, but not the actual structs it contains. The issue was probably introduced in commit 2383323661f3b8342b2c4d356fcfe8c5d1b045f8 where the loop to allocate the rects in the array was thrown away.

    opened by lorenz 0
  • movenc.c: Write total number of tracks as part of metadata.

    movenc.c: Write total number of tracks as part of metadata.

    Fix for setting total tracks number in metadata Same issue was fixed in ffmpeg: https://github.com/macoscope/ffmpeg/commit/bb7f71d9b6aedf8e83061e326f09843fd21fcbce

    opened by alexyr 1
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