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Stefan Westerfeld
ffmpeg
Commits
f8a45fa1
Commit
f8a45fa1
authored
Mar 14, 2011
by
Janne Grunau
Committed by
Janne Grunau
Mar 16, 2011
Browse files
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replace FFmpeg with Libav in doc/
unless it stands for ffmpeg the program or is historic
parent
a03be6e1
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bitstream_filters.texi
doc/bitstream_filters.texi
+1
-1
build_system.txt
doc/build_system.txt
+1
-1
demuxers.texi
doc/demuxers.texi
+2
-2
developer.texi
doc/developer.texi
+10
-10
encoders.texi
doc/encoders.texi
+2
-2
eval.texi
doc/eval.texi
+1
-1
faq.texi
doc/faq.texi
+28
-28
ffmpeg.texi
doc/ffmpeg.texi
+3
-3
ffplay.texi
doc/ffplay.texi
+4
-4
ffprobe.texi
doc/ffprobe.texi
+2
-2
ffserver.texi
doc/ffserver.texi
+2
-2
fftools-common-opts.texi
doc/fftools-common-opts.texi
+1
-1
filters.texi
doc/filters.texi
+5
-5
general.texi
doc/general.texi
+29
-29
git-howto.txt
doc/git-howto.txt
+5
-5
indevs.texi
doc/indevs.texi
+3
-3
issue_tracker.txt
doc/issue_tracker.txt
+5
-5
libavfilter.texi
doc/libavfilter.texi
+3
-3
metadata.texi
doc/metadata.texi
+2
-2
multithreading.txt
doc/multithreading.txt
+2
-2
muxers.texi
doc/muxers.texi
+2
-2
optimization.txt
doc/optimization.txt
+2
-2
outdevs.texi
doc/outdevs.texi
+2
-2
protocols.texi
doc/protocols.texi
+2
-2
soc.txt
doc/soc.txt
+3
-3
No files found.
doc/bitstream_filters.texi
View file @
f8a45fa1
@chapter Bitstream Filters
@c man begin BITSTREAM FILTERS
When you configure your
FFmpeg
build, all the supported bitstream
When you configure your
Libav
build, all the supported bitstream
filters are enabled by default. You can list all available ones using
the configure option @code{--list-bsfs}.
...
...
doc/build_system.txt
View file @
f8a45fa1
FFmpeg
currently uses a custom build system, this text attempts to document
Libav
currently uses a custom build system, this text attempts to document
some of its obscure features and options.
Options to make:
...
...
doc/demuxers.texi
View file @
f8a45fa1
@chapter Demuxers
@c man begin DEMUXERS
Demuxers are configured elements in
FFmpeg
which allow to read the
Demuxers are configured elements in
Libav
which allow to read the
multimedia streams from a particular type of file.
When you configure your
FFmpeg
build, all the supported demuxers
When you configure your
Libav
build, all the supported demuxers
are enabled by default. You can list all available ones using the
configure option "--list-demuxers".
...
...
doc/developer.texi
View file @
f8a45fa1
...
...
@@ -32,12 +32,12 @@ generated by ./configure to understand what is needed.
You can use libavcodec or libavformat in your commercial program, but
@emph
{
any patch you make must be published
}
. The best way to proceed is
to send your patches to the
FFmpeg
mailing list.
to send your patches to the
Libav
mailing list.
@anchor
{
Coding Rules
}
@section Coding Rules
FFmpeg
is programmed in the ISO C90 language with a few additional
Libav
is programmed in the ISO C90 language with a few additional
features from ISO C99, namely:
@itemize @bullet
@item
...
...
@@ -54,7 +54,7 @@ These features are supported by all compilers we care about, so we will not
accept patches to remove their use unless they absolutely do not impair
clarity and performance.
All code must compile with GCC 2.95 and GCC 3.3. Currently,
FFmpeg
also
All code must compile with GCC 2.95 and GCC 3.3. Currently,
Libav
also
compiles with several other compilers, such as the Compaq ccc compiler
or Sun Studio 9, and we would like to keep it that way unless it would
be exceedingly involved. To ensure compatibility, please do not use any
...
...
@@ -76,7 +76,7 @@ The TAB character is forbidden outside of Makefiles as is any
form of trailing whitespace. Commits containing either will be
rejected by the Subversion repository.
The main priority in
FFmpeg
is simplicity and small code size in order to
The main priority in
Libav
is simplicity and small code size in order to
minimize the bug count.
Comments: Use the JavaDoc/Doxygen
...
...
@@ -129,7 +129,7 @@ should also be avoided if they don't make the code easier to understand.
an "or any later version" clause is also acceptable, but LGPL is
preferred.
@item
You must not commit code which breaks
FFmpeg
! (Meaning unfinished but
You must not commit code which breaks
Libav
! (Meaning unfinished but
enabled code which breaks compilation or compiles but does not work or
breaks the regression tests)
You can commit unfinished stuff (for testing etc), but it must be disabled
...
...
@@ -168,7 +168,7 @@ should also be avoided if they don't make the code easier to understand.
with functional changes, such commits will be rejected and removed. Every
developer has his own indentation style, you should not change it. Of course
if you (re)write something, you can use your own style, even though we would
prefer if the indentation throughout
FFmpeg
was consistent (Many projects
prefer if the indentation throughout
Libav
was consistent (Many projects
force a given indentation style - we do not.). If you really need to make
indentation changes (try to avoid this), separate them strictly from real
changes.
...
...
@@ -253,7 +253,7 @@ keeping it as a logical unit that contains an individual change, even
if it spans multiple files. This makes reviewing your patches much easier
for us and greatly increases your chances of getting your patch applied.
Use the patcheck tool of
FFmpeg
to check your patch.
Use the patcheck tool of
Libav
to check your patch.
The tool is located in the tools directory.
Run the regression tests before submitting a patch so that you can
...
...
@@ -275,7 +275,7 @@ Your patch will be reviewed on the mailing list. You will likely be asked
to make some changes and are expected to send in an improved version that
incorporates the requests from the review. This process may go through
several iterations. Once your patch is deemed good enough, some developer
will pick it up and commit it to the official
FFmpeg
tree.
will pick it up and commit it to the official
Libav
tree.
Give us a few days to react. But if some time passes without reaction,
send a reminder by email. Your patch should eventually be dealt with.
...
...
@@ -325,7 +325,7 @@ send a reminder by email. Your patch should eventually be dealt with.
@item
Is the patch a unified diff?
@item
Is the patch against latest
FFmpeg
git master branch?
Is the patch against latest
Libav
git master branch?
@item
Are you subscribed to ffmpeg-dev?
(the list is subscribers only due to spam)
...
...
@@ -374,7 +374,7 @@ send a reminder by email. Your patch should eventually be dealt with.
patch easily?
@item
If you added a new file, did you insert a license header? It should be
taken from
FFmpeg
, not randomly copied and pasted from somewhere else.
taken from
Libav
, not randomly copied and pasted from somewhere else.
@item
You should maintain alphabetical order in alphabetically ordered lists as
long as doing so does not break API/ABI compatibility.
...
...
doc/encoders.texi
View file @
f8a45fa1
@chapter Encoders
@c man begin ENCODERS
Encoders are configured elements in
FFmpeg
which allow the encoding of
Encoders are configured elements in
Libav
which allow the encoding of
multimedia streams.
When you configure your
FFmpeg
build, all the supported native encoders
When you configure your
Libav
build, all the supported native encoders
are enabled by default. Encoders requiring an external library must be enabled
manually via the corresponding @code{--enable-lib} option. You can list all
available encoders using the configure option @code{--list-encoders}.
...
...
doc/eval.texi
View file @
f8a45fa1
@chapter Expression Evaluation
@c man begin EXPRESSION EVALUATION
When evaluating an arithemetic expression,
FFmpeg
uses an internal
When evaluating an arithemetic expression,
Libav
uses an internal
formula evaluator, implemented through the @file{libavutil/eval.h}
interface.
...
...
doc/faq.texi
View file @
f8a45fa1
\input
texinfo @c -*- texinfo -*-
@settitle
FFmpeg
FAQ
@settitle
Libav
FAQ
@titlepage
@center @titlefont
{
FFmpeg
FAQ
}
@center @titlefont
{
Libav
FAQ
}
@end titlepage
@top
...
...
@@ -11,33 +11,33 @@
@chapter General Questions
@section When will the next
FFmpeg version be released? / Why are FFmpeg
releases so few and far between?
@section When will the next
Libav version be released? / Why are Libav
releases so few and far between?
Like most open source projects
FFmpeg
suffers from a certain lack of
Like most open source projects
Libav
suffers from a certain lack of
manpower. For this reason the developers have to prioritize the work
they do and putting out releases is not at the top of the list, fixing
bugs and reviewing patches takes precedence. Please don't complain or
request more timely and/or frequent releases unless you are willing to
help out creating them.
@section I have a problem with an old version of
FFmpeg
; where should I report it?
Nowhere. We do not support old
FFmpeg
versions in any way, we simply lack
@section I have a problem with an old version of
Libav
; where should I report it?
Nowhere. We do not support old
Libav
versions in any way, we simply lack
the time, motivation and manpower to do so. If you have a problem with an
old version of
FFmpeg
, upgrade to the latest Subversion snapshot. If you
old version of
Libav
, upgrade to the latest Subversion snapshot. If you
still experience the problem, then you can report it according to the
guidelines in @url
{
http://libav.org/bugreports.html
}
.
@section Why doesn't
FFmpeg
support feature [xyz]?
@section Why doesn't
Libav
support feature [xyz]?
Because no one has taken on that task yet.
FFmpeg
development is
Because no one has taken on that task yet.
Libav
development is
driven by the tasks that are important to the individual developers.
If there is a feature that is important to you, the best way to get
it implemented is to undertake the task yourself or sponsor a developer.
@section
FFmpeg
does not support codec XXX. Can you include a Windows DLL loader to support it?
@section
Libav
does not support codec XXX. Can you include a Windows DLL loader to support it?
No. Windows DLLs are not portable, bloated and often slow.
Moreover
FFmpeg
strives to support all codecs natively.
Moreover
Libav
strives to support all codecs natively.
A DLL loader is not conducive to that goal.
@section My bug report/mail to libav-devel/user has not received any replies.
...
...
@@ -55,10 +55,10 @@ libav* from another application.
@item You speak about a video having problems on playback but
not what you use to play it.
@item We have no faint clue what you are talking about besides
that it is related to
FFmpeg
.
that it is related to
Libav
.
@end itemize
@section Is there a forum for
FFmpeg
? I do not like mailing lists.
@section Is there a forum for
Libav
? I do not like mailing lists.
You may view our mailing lists with a more forum-alike look here:
@url
{
http://dir.gmane.org/gmane.comp.video.ffmpeg.user
}
,
...
...
@@ -272,7 +272,7 @@ material, and try '-top 0/1' if the result looks really messed-up.
@section How can I read DirectShow files?
If you have built
FFmpeg
with @code
{
./configure --enable-avisynth
}
If you have built
Libav
with @code
{
./configure --enable-avisynth
}
(only possible on MinGW/Cygwin platforms),
then you may use any file that DirectShow can read as input.
...
...
@@ -368,11 +368,11 @@ examining all of the vbv_delay values and making complicated computations."
@chapter Development
@section Are there examples illustrating how to use the
FFmpeg
libraries, particularly libavcodec and libavformat?
@section Are there examples illustrating how to use the
Libav
libraries, particularly libavcodec and libavformat?
Yes. Read the Developers Guide of the
FFmpeg
documentation. Alternatively,
Yes. Read the Developers Guide of the
Libav
documentation. Alternatively,
examine the source code for one of the many open source projects that
already incorporate
FFmpeg
at (@url
{
projects.html
}
).
already incorporate
Libav
at (@url
{
projects.html
}
).
@section Can you support my C compiler XXX?
...
...
@@ -383,14 +383,14 @@ with @code{#ifdef}s related to the compiler.
@section Is Microsoft Visual C++ supported?
No. Microsoft Visual C++ is not compliant to the C99 standard and does
not - among other things - support the inline assembly used in
FFmpeg
.
not - among other things - support the inline assembly used in
Libav
.
If you wish to use MSVC++ for your
project then you can link the MSVC++ code with libav* as long as
you compile the latter with a working C compiler. For more information, see
the @emph
{
Microsoft Visual C++ compatibility
}
section in the
FFmpeg
the @emph
{
Microsoft Visual C++ compatibility
}
section in the
Libav
documentation.
There have been efforts to make
FFmpeg
compatible with MSVC++ in the
There have been efforts to make
Libav
compatible with MSVC++ in the
past. However, they have all been rejected as too intrusive, especially
since MinGW does the job adequately. None of the core developers
work with MSVC++ and thus this item is low priority. Should you find
...
...
@@ -398,13 +398,13 @@ the silver bullet that solves this problem, feel free to shoot it at us.
We strongly recommend you to move over from MSVC++ to MinGW tools.
@section Can I use
FFmpeg
or libavcodec under Windows?
@section Can I use
Libav
or libavcodec under Windows?
Yes, but the Cygwin or MinGW tools @emph
{
must
}
be used to compile
FFmpeg
.
Read the @emph
{
Windows
}
section in the
FFmpeg
documentation to find more
Yes, but the Cygwin or MinGW tools @emph
{
must
}
be used to compile
Libav
.
Read the @emph
{
Windows
}
section in the
Libav
documentation to find more
information.
To get help and instructions for building
FFmpeg
under Windows, check out
To get help and instructions for building
Libav
under Windows, check out
the FFmpeg Windows Help Forum at
@url
{
http://ffmpeg.arrozcru.org/
}
.
...
...
@@ -414,7 +414,7 @@ No. These tools are too bloated and they complicate the build.
@section Why not rewrite ffmpeg in object-oriented C++?
FFmpeg
is already organized in a highly modular manner and does not need to
Libav
is already organized in a highly modular manner and does not need to
be rewritten in a formal object language. Further, many of the developers
favor straight C; it works for them. For more arguments on this matter,
read "Programming Religion" at (@url
{
http://www.tux.org/lkml/#s15
}
).
...
...
@@ -441,16 +441,16 @@ the compilation failure then you are probably not qualified for this.
@section I'm using libavcodec from within my C++ application but the linker complains about missing symbols which seem to be available.
FFmpeg
is a pure C project, so to use the libraries within your C++ application
Libav
is a pure C project, so to use the libraries within your C++ application
you need to explicitly state that you are using a C library. You can do this by
encompassing your
FFmpeg
includes using @code
{
extern "C"
}
.
encompassing your
Libav
includes using @code
{
extern "C"
}
.
See @url
{
http://www.parashift.com/c++-faq-lite/mixing-c-and-cpp.html#faq-32.3
}
@section I have a file in memory / a API different from *open/*read/ libc how do I use it with libavformat?
You have to implement a URLProtocol, see @file
{
libavformat/file.c
}
in
FFmpeg
and @file
{
libmpdemux/demux
_
lavf.c
}
in MPlayer sources.
Libav
and @file
{
libmpdemux/demux
_
lavf.c
}
in MPlayer sources.
@section I get "No compatible shell script interpreter found." in MSys.
...
...
doc/ffmpeg.texi
View file @
f8a45fa1
...
...
@@ -735,7 +735,7 @@ A preset file contains a sequence of @var{option}=@var{value} pairs,
one for each line, specifying a sequence of options which would be
awkward to specify on the command line. Lines starting with the hash
('#') character are ignored and are used to provide comments. Check
the @file
{
ffpresets
}
directory in the
FFmpeg
source tree for examples.
the @file
{
ffpresets
}
directory in the
Libav
source tree for examples.
Preset files are specified with the @code
{
vpre
}
, @code
{
apre
}
,
@code
{
spre
}
, and @code
{
fpre
}
options. The @code
{
fpre
}
option takes the
...
...
@@ -997,11 +997,11 @@ file to which you want to add them.
@settitle FFmpeg video converter
@c man begin SEEALSO
ffplay(1), ffprobe(1), ffserver(1) and the
FFmpeg
HTML documentation
ffplay(1), ffprobe(1), ffserver(1) and the
Libav
HTML documentation
@c man end
@c man begin AUTHORS
The
FFmpeg
developers
The
Libav
developers
@c man end
@end ignore
...
...
doc/ffplay.texi
View file @
f8a45fa1
...
...
@@ -20,9 +20,9 @@ ffplay [options] @file{input_file}
@chapter Description
@c man begin DESCRIPTION
FFplay is a very simple and portable media player using the
FFmpeg
FFplay is a very simple and portable media player using the
Libav
libraries and the SDL library. It is mostly used as a testbed for the
various
FFmpeg
APIs.
various
Libav
APIs.
@c man end
@chapter Options
...
...
@@ -169,11 +169,11 @@ Seek to percentage in file corresponding to fraction of width.
@settitle FFplay media player
@c man begin SEEALSO
ffmpeg(1), ffprobe(1), ffserver(1) and the
FFmpeg
HTML documentation
ffmpeg(1), ffprobe(1), ffserver(1) and the
Libav
HTML documentation
@c man end
@c man begin AUTHORS
The
FFmpeg
developers
The
Libav
developers
@c man end
@end ignore
...
...
doc/ffprobe.texi
View file @
f8a45fa1
...
...
@@ -122,11 +122,11 @@ with name "STREAM".
@settitle FFprobe media prober
@c man begin SEEALSO
ffmpeg(1), ffplay(1), ffserver(1) and the
FFmpeg
HTML documentation
ffmpeg(1), ffplay(1), ffserver(1) and the
Libav
HTML documentation
@c man end
@c man begin AUTHORS
The
FFmpeg
developers
The
Libav
developers
@c man end
@end ignore
...
...
doc/ffserver.texi
View file @
f8a45fa1
...
...
@@ -266,11 +266,11 @@ rather than as a daemon.
@c man begin SEEALSO
ffmpeg(1), ffplay(1), ffprobe(1), the @file
{
ffmpeg/doc/ffserver.conf
}
example and the
FFmpeg
HTML documentation
example and the
Libav
HTML documentation
@c man end
@c man begin AUTHORS
The
FFmpeg
developers
The
Libav
developers
@c man end
@end ignore
...
...
doc/fftools-common-opts.texi
View file @
f8a45fa1
...
...
@@ -88,6 +88,6 @@ can be disabled setting the environment variable
@env{FFMPEG_FORCE_NOCOLOR} or @env{NO_COLOR}, or can be forced setting
the environment variable @env{FFMPEG_FORCE_COLOR}.
The use of the environment variable @env{NO_COLOR} is deprecated and
will be dropped in a following
FFmpeg
version.
will be dropped in a following
Libav
version.
@end table
doc/filters.texi
View file @
f8a45fa1
...
...
@@ -92,7 +92,7 @@ Follows a BNF description for the filtergraph syntax:
@chapter Audio Filters
@c man begin AUDIO FILTERS
When you configure your
FFmpeg
build, you can disable any of the
When you configure your
Libav
build, you can disable any of the
existing filters using --disable-filters.
The configure output will show the audio filters included in your
build.
...
...
@@ -155,7 +155,7 @@ tools.
@chapter Video Filters
@c man begin VIDEO FILTERS
When you configure your
FFmpeg
build, you can disable any of the
When you configure your
Libav
build, you can disable any of the
existing filters using --disable-filters.
The configure output will show the video filters included in your
build.
...
...
@@ -386,7 +386,7 @@ format=yuv420p:yuv444p:yuv410p
Apply a frei0r effect to the input video.
To enable compilation of this filter you need to install the frei0r
header and configure
FFmpeg
with --enable-frei0r.
header and configure
Libav
with --enable-frei0r.
The filter supports the syntax:
@example
...
...
@@ -524,7 +524,7 @@ Pass the video source unchanged to the output.
Apply video transform using libopencv.
To enable this filter install libopencv library and headers and
configure
FFmpeg
with --enable-libopencv.
configure
Libav
with --enable-libopencv.
The filter takes the parameters: @var{filter_name}@{:=@}@var{filter_params}.
...
...
@@ -1164,7 +1164,7 @@ timebase. The expression can contain the constants "PI", "E", "PHI",
Provide a frei0r source.
To enable compilation of this filter you need to install the frei0r
header and configure
FFmpeg
with --enable-frei0r.
header and configure
Libav
with --enable-frei0r.
The source supports the syntax:
@example
...
...
doc/general.texi
View file @
f8a45fa1
...
...
@@ -11,13 +11,13 @@
@chapter external libraries
FFmpeg
can be hooked up with a number of external libraries to add support
Libav
can be hooked up with a number of external libraries to add support
for more formats. None of them are used by default, their use has to be
explicitly requested by passing the appropriate flags to @file
{
./configure
}
.
@section OpenCORE AMR
FFmpeg
can make use of the OpenCORE libraries for AMR-NB
Libav
can make use of the OpenCORE libraries for AMR-NB
decoding/encoding and AMR-WB decoding.
Go to @url
{
http://sourceforge.net/projects/opencore-amr/
}
and follow the instructions for
...
...
@@ -27,7 +27,7 @@ installing the libraries. Then pass @code{--enable-libopencore-amrnb} and/or
Note that OpenCORE is under the Apache License 2.0 (see
@url
{
http://www.apache.org/licenses/LICENSE-2.0
}
for details), which is
incompatible with the LGPL version 2.1 and GPL version 2. You have to
upgrade
FFmpeg
's license to LGPL version 3 (or if you have enabled
upgrade
Libav
's license to LGPL version 3 (or if you have enabled
GPL components, GPL version 3) to use it.
...
...
@@ -37,7 +37,7 @@ You can use the @code{-formats} and @code{-codecs} options to have an exhaustive
@section File Formats
FFmpeg
supports the following file formats through the @code
{
libavformat
}
Libav
supports the following file formats through the @code
{
libavformat
}
library:
@multitable @columnfractions .4 .1 .1 .4
...
...
@@ -751,18 +751,18 @@ Using a cross-compiler is preferred for various reasons.
@subsection DJGPP
FFmpeg
cannot be compiled because of broken system headers, add
Libav
cannot be compiled because of broken system headers, add
@code
{
--extra-cflags=-U
__
STRICT
_
ANSI
__}
to the configure options as a
workaround.
@section OS/2
For information about compiling
FFmpeg
on OS/2 see
For information about compiling
Libav
on OS/2 see
@url
{
http://www.edm2.com/index.php/FFmpeg
}
.
@section Unix-like
Some parts of
FFmpeg
cannot be built with version 2.15 of the GNU
Some parts of
Libav
cannot be built with version 2.15 of the GNU
assembler which is still provided by a few AMD64 distributions. To
make sure your compiler really uses the required version of gas
after a binutils upgrade, run:
...
...
@@ -777,7 +777,7 @@ to configure.
@subsection BSD
BSD make will not build
FFmpeg
, you need to install and use GNU Make
BSD make will not build
Libav
, you need to install and use GNU Make
(
@file
{
gmake
}
)
.
@subsubsection FreeBSD
...
...
@@ -790,7 +790,7 @@ getting the system headers fixed.
@subsection
(
Open
)
Solaris
GNU Make is required to build
FFmpeg
, so you have to invoke
(
@file
{
gmake
}
)
,
GNU Make is required to build
Libav
, so you have to invoke
(
@file
{
gmake
}
)
,
standard Solaris Make will not work. When building with a non
-
c
99
front
-
end
(
gcc, generic suncc
)
add either @code
{
--
extra
-
libs
=/
usr
/
lib
/
values
-
xpg
6
.o
}
or @code
{
--
extra
-
libs
=/
usr
/
lib
/
64
/
values
-
xpg
6
.o
}
to the configure options
...
...
@@ -808,22 +808,22 @@ bash ./configure
MacOS X on PowerPC or ARM
(
iPhone
)
requires a preprocessor from
@url
{
http:
//
github.com
/
yuvi
/
gas
-
preprocessor
}
to build the optimized
assembler functions. Just download the Perl script and put it somewhere
in your PATH,
FFmpeg
's configure will pick it up automatically.
in your PATH,
Libav
's configure will pick it up automatically.
@section Windows
To get help and instructions for building
FFmpeg
under Windows, check out
To get help and instructions for building
Libav
under Windows, check out
the FFmpeg Windows Help Forum at
@url
{
http:
//
ffmpeg.arrozcru.org
/
}
.
@subsection Native Windows compilation
FFmpeg
can be built to run natively on Windows using the MinGW tools. Install
Libav
can be built to run natively on Windows using the MinGW tools. Install
the latest versions of MSYS and MinGW from @url
{
http:
//
www.mingw.org
/
}
.
You can find detailed installation
instructions in the download section and the FAQ.
FFmpeg
does not build out
-
of
-
the
-
box with the packages the automated MinGW
Libav
does not build out
-
of
-
the
-
box with the packages the automated MinGW
installer provides. It also requires coreutils to be installed and many other
packages updated to the latest version. The minimum version for some packages
are listed below:
...
...
@@ -835,7 +835,7 @@ are listed below:
@item mingw
-
runtime
3
.
15
@end itemize
FFmpeg
automatically passes @code
{
-
fno
-
common
}
to the compiler to work around
Libav
automatically passes @code
{
-
fno
-
common
}
to the compiler to work around
a GCC bug
(
see @url
{
http:
//
gcc.gnu.org
/
bugzilla
/
show
_
bug.cgi?id
=
37216
}
)
.
Within the MSYS shell, configure and make with:
...
...
@@ -866,14 +866,14 @@ Edit the @file{bin/sdl-config} script so that it points to the correct prefix
where SDL was installed. Verify that @file
{
sdl
-
config
}
can be launched from
the MSYS command line.
@item By using @code
{
.
/
configure
--
enable
-
shared
}
when configuring
FFmpeg
,
@item By using @code
{
.
/
configure
--
enable
-
shared
}
when configuring
Libav
,
you can build libavutil, libavcodec and libavformat as DLLs.
@end itemize
@subsection Microsoft Visual C
++
compatibility
As stated in the FAQ,
FFmpeg
will not compile under MSVC
++
. However, if you
As stated in the FAQ,
Libav
will not compile under MSVC
++
. However, if you
want to use the libav
*
libraries in your own applications, you can still
compile those applications using MSVC
++
. But the libav
*
libraries you link
to @emph
{
must
}
be built with MinGW. However, you will not be able to debug
...
...
@@ -881,13 +881,13 @@ inside the libav* libraries, since MSVC++ does not recognize the debug
symbols generated by GCC.
We strongly recommend you to move over from MSVC
++
to MinGW tools.
This description of how to use the
FFmpeg
libraries with MSVC
++
is based on
This description of how to use the
Libav
libraries with MSVC
++
is based on
Microsoft Visual C
++
2005
Express Edition. If you have a different version,
you might have to modify the procedures slightly.
@subsubsection Using static libraries
Assuming you have just built and installed
FFmpeg
in @file
{
/
usr
/
local
}
.
Assuming you have just built and installed
Libav
in @file
{
/
usr
/
local
}
.
@enumerate
...
...
@@ -898,13 +898,13 @@ Application Wizard, uncheck the "Precompiled headers" option.
@item Write the source code for your application, or, for testing, just
copy the code from an existing sample application into the source file
that MSVC
++
has already created for you. For example, you can copy
@file
{
libavformat
/
output
-
example.c
}
from the
FFmpeg
distribution.
@file
{
libavformat
/
output
-
example.c
}
from the
Libav
distribution.
@item Open the "Project
/
Properties" dialog box. In the "Configuration"
combo box, select "All Configurations" so that the changes you make will
affect both debug and release builds. In the tree view on the left hand
side, select "C
/
C
++
/
General", then edit the "Additional Include
Directories" setting to contain the path where the
FFmpeg
includes were
Directories" setting to contain the path where the
Libav
includes were
installed
(
i.e. @file
{
c:
\msys\1
.
0
\local\include
}
)
.
Do not add MinGW's include directory here, or the include files will
conflict with MSVC's.
...
...
@@ -912,7 +912,7 @@ conflict with MSVC's.
@item Still in the "Project
/
Properties" dialog box, select
"Linker
/
General" from the tree view and edit the
"Additional Library Directories" setting to contain the @file
{
lib
}
directory where
FFmpeg
was installed
(
i.e. @file
{
c:
\msys\1
.
0
\local\lib
}
)
,
directory where
Libav
was installed
(
i.e. @file
{
c:
\msys\1
.
0
\local\lib
}
)
,
the directory where MinGW libs are installed
(
i.e. @file
{
c:
\mingw\lib
}
)
,
and the directory where MinGW's GCC libs are installed
(
i.e. @file
{
C:
\mingw\lib\gcc\mingw
32
\4
.
2
.
1
-
sjlj
}
)
. Then select
...
...
@@ -929,13 +929,13 @@ set to "Multi-threaded DLL".
@item Click "OK" to close the "Project
/
Properties" dialog box.
@item MSVC
++
lacks some C
99
header files that are fundamental for
FFmpeg
.
@item MSVC
++
lacks some C
99
header files that are fundamental for
Libav
.
Get msinttypes from @url
{
http:
//
code.google.com
/
p
/
msinttypes
/
downloads
/
list
}
and install it in MSVC
++
's include directory
(
i.e. @file
{
C:
\Program
Files
\Microsoft
Visual Studio
8
\VC\include
}
)
.
@item MSVC
++
also does not understand the @code
{
inline
}
keyword used by
FFmpeg
, so you must add this line before @code
{
#include
}
ing libav
*
:
Libav
, so you must add this line before @code
{
#include
}
ing libav
*
:
@example
#define inline
_
inline
@end example
...
...
@@ -968,10 +968,10 @@ and run @file{c:\msys\1.0\msys.bat} from there.
@item Within the MSYS shell, run @code
{
lib.exe
}
. If you get a help message
from @file
{
Microsoft
(
R
)
Library Manager
}
, this means your environment
variables are set up correctly, the @file
{
Microsoft
(
R
)
Library Manager
}
is on the path and will be used by
FFmpeg
to create
is on the path and will be used by
Libav
to create
MSVC
++-
compatible import libraries.
@item Build
FFmpeg
with
@item Build
Libav
with
@example
.
/
configure
--
enable
-
shared
--
enable
-
memalign
-
hack
...
...
@@ -1000,7 +1000,7 @@ of DLL files, but the ones that are actually used to run your application
are the ones with a major version number in their filenames
(
i.e. @file
{
avcodec
-
51
.dll
}
)
.
FFmpeg
headers do not declare global data for Windows DLLs through the usual
Libav
headers do not declare global data for Windows DLLs through the usual
dllexport
/
dllimport interface. Such data will be exported properly while
building, but to use them in your MSVC
++
code you will have to edit the
appropriate headers and mark the data as dllimport. For example, in
...
...
@@ -1014,14 +1014,14 @@ extern __declspec(dllimport) const AVPixFmtDescriptor av_pix_fmt_descriptors[];
You must use the MinGW cross compilation tools available at
@url
{
http:
//
www.mingw.org
/
}
.
Then configure
FFmpeg
with the following options:
Then configure
Libav
with the following options:
@example
.
/
configure
--
target
-
os
=
mingw
32
--
cross
-
prefix
=
i
386
-
mingw
32
msvc
-
@end example
(
you can change the cross
-
prefix according to the prefix chosen for the
MinGW tools
)
.
Then you can easily test
FFmpeg
with Wine
Then you can easily test
Libav
with Wine
(
@url
{
http:
//
www.winehq.com
/
}
)
.
@subsection Compilation under Cygwin
...
...
@@ -1055,7 +1055,7 @@ shared libraries:
.
/
configure
--
enable
-
shared
--
disable
-
static
--
extra
-
cflags
=-
fno
-
reorder
-
functions
@end example
If you want to build
FFmpeg
with additional libraries, download Cygwin
If you want to build
Libav
with additional libraries, download Cygwin
"Devel" packages for Ogg and Vorbis from any Cygwin packages repository:
@example
libogg
-
devel, libvorbis
-
devel
...
...
doc/git-howto.txt
View file @
f8a45fa1
...
...
@@ -28,9 +28,9 @@ Consult these resources whenever you have problems, they are quite exhaustive.
You do not need a special username or password.
All you need is to provide a ssh public key to the Git server admin.
What follows now is a basic introduction to Git and some
FFmpeg
-specific
What follows now is a basic introduction to Git and some
Libav
-specific
guidelines. Read it at least once, if you are granted commit privileges to the
FFmpeg
project you are expected to be familiar with these rules.
Libav
project you are expected to be familiar with these rules.
...
...
@@ -46,11 +46,11 @@ I. BASICS:
git clone git://git.libav.org/libav.git <target>
This will put the
FFmpeg
sources into the directory <target>.
This will put the
Libav
sources into the directory <target>.
git clone git@git.libav.org:libav.git <target>
This will put the
FFmpeg
sources into the directory <target> and let
This will put the
Libav
sources into the directory <target> and let
you push back your changes to the remote repository.
...
...
@@ -72,7 +72,7 @@ I. BASICS:
fetches the changes from the main repository and replays your local commits
over it. This is required to keep all your local changes at the top of
FFmpeg
's master tree. The master tree will reject pushes with merge commits.
Libav
's master tree. The master tree will reject pushes with merge commits.
3. Adding/removing files/directories:
...
...
doc/indevs.texi
View file @
f8a45fa1
@chapter Input Devices
@c man begin INPUT DEVICES
Input devices are configured elements in
FFmpeg
which allow to access
Input devices are configured elements in
Libav
which allow to access
the data coming from a multimedia device attached to your system.
When you configure your
FFmpeg
build, all the supported input devices
When you configure your
Libav
build, all the supported input devices
are enabled by default. You can list all available ones using the
configure option "--list-indevs".
...
...
@@ -70,7 +70,7 @@ A JACK input device creates one or more JACK writable clients, one for
each audio channel, with name @var{client_name}:input_@var{N}, where
@var{client_name} is the name provided by the application, and @var{N}
is a number which identifies the channel.
Each writable client will send the acquired data to the
FFmpeg
input
Each writable client will send the acquired data to the
Libav
input
device.
Once you have created one or more JACK readable clients, you need to
...
...
doc/issue_tracker.txt
View file @
f8a45fa1
FFmpeg
's bug/patch/feature request tracker manual
================================================
=
Libav
's bug/patch/feature request tracker manual
================================================
NOTE: This is a draft.
Overview:
---------
FFmpeg
uses Roundup for tracking issues, new issues and changes to
Libav
uses Roundup for tracking issues, new issues and changes to
existing issues can be done through a web interface and through email.
It is possible to subscribe to individual issues by adding yourself to the
nosy list or to subscribe to the ffmpeg-issues mailing list which receives
...
...
@@ -60,7 +60,7 @@ critical
No feature request can be critical.
important
Bugs which make
FFmpeg
unusable for a significant number of users, and
Bugs which make
Libav
unusable for a significant number of users, and
patches fixing them.
Examples here might be completely broken MPEG-4 decoding or a build issue
on Linux.
...
...
@@ -81,7 +81,7 @@ minor
wish
Something that is desirable to have but that there is no urgency at
all to implement, e.g. something completely cosmetic like a website
restyle or a personalized doxy template or the
FFmpeg
logo.
restyle or a personalized doxy template or the
Libav
logo.
This priority is not valid for bugs.
...
...
doc/libavfilter.texi
View file @
f8a45fa1
...
...
@@ -11,10 +11,10 @@
@chapter Introduction
Libavfilter is the filtering API of
FFmpeg
. It is the substitute of the
Libavfilter is the filtering API of
Libav
. It is the substitute of the
now deprecated 'vhooks' and started as a Google Summer of Code project.
Integrating libavfilter into the main
FFmpeg
repository is a work in
Integrating libavfilter into the main
Libav
repository is a work in
progress. If you wish to try the unfinished development code of
libavfilter then check it out from the libavfilter repository into
some directory of your choice by:
...
...
@@ -74,7 +74,7 @@ not have video output.
@chapter graph2dot
The @file
{
graph2dot
}
program included in the
FFmpeg
@file
{
tools
}
The @file
{
graph2dot
}
program included in the
Libav
@file
{
tools
}
directory can be used to parse a filter graph description and issue a
corresponding textual representation in the dot language.
...
...
doc/metadata.texi
View file @
f8a45fa1
@chapter Metadata
@c man begin METADATA
FFmpeg
is able to dump metadata from media files into a simple UTF-8-encoded
Libav
is able to dump metadata from media files into a simple UTF-8-encoded
INI-like text file and then load it back using the metadata muxer/demuxer.
The file format is as follows:
...
...
@@ -53,7 +53,7 @@ A ffmetadata file might look like this:
;FFMETADATA1
title=bike\\shed
;this is a comment
artist=
FFmpeg
troll team
artist=
Libav
troll team
[CHAPTER]
TIMEBASE=1/1000
...
...
doc/multithreading.txt
View file @
f8a45fa1
FFmpeg
multithreading methods
Libav
multithreading methods
==============================================
FFmpeg
provides two methods for multithreading codecs.
Libav
provides two methods for multithreading codecs.
Slice threading decodes multiple parts of a frame at the same time, using
AVCodecContext execute() and execute2().
...
...
doc/muxers.texi
View file @
f8a45fa1
@chapter Muxers
@c man begin MUXERS
Muxers are configured elements in
FFmpeg
which allow writing
Muxers are configured elements in
Libav
which allow writing
multimedia streams to a particular type of file.
When you configure your
FFmpeg
build, all the supported muxers
When you configure your
Libav
build, all the supported muxers
are enabled by default. You can list all available muxers using the
configure option @code{--list-muxers}.
...
...
doc/optimization.txt
View file @
f8a45fa1
...
...
@@ -17,7 +17,7 @@ Understanding these overoptimized functions:
As many functions tend to be a bit difficult to understand because
of optimizations, it can be hard to optimize them further, or write
architecture-specific versions. It is recommended to look at older
revisions of the interesting files (web frontends for the various
FFmpeg
revisions of the interesting files (web frontends for the various
Libav
branches are listed at http://libav.org/download.html).
Alternatively, look into the other architecture-specific versions in
the x86/, ppc/, alpha/ subdirectories. Even if you don't exactly
...
...
@@ -201,7 +201,7 @@ Inline asm vs. external asm
---------------------------
Both inline asm (__asm__("..") in a .c file, handled by a compiler such as gcc)
and external asm (.s or .asm files, handled by an assembler such as yasm/nasm)
are accepted in
FFmpeg
. Which one to use differs per specific case.
are accepted in
Libav
. Which one to use differs per specific case.
- if your code is intended to be inlined in a C function, inline asm is always
better, because external asm cannot be inlined
...
...
doc/outdevs.texi
View file @
f8a45fa1
@chapter Output Devices
@c man begin OUTPUT DEVICES
Output devices are configured elements in
FFmpeg
which allow to write
Output devices are configured elements in
Libav
which allow to write
multimedia data to an output device attached to your system.
When you configure your
FFmpeg
build, all the supported output devices
When you configure your
Libav
build, all the supported output devices
are enabled by default. You can list all available ones using the
configure option "--list-outdevs".
...
...
doc/protocols.texi
View file @
f8a45fa1
@chapter Protocols
@c man begin PROTOCOLS
Protocols are configured elements in
FFmpeg
which allow to access
Protocols are configured elements in
Libav
which allow to access
resources which require the use of a particular protocol.
When you configure your
FFmpeg
build, all the supported protocols are
When you configure your
Libav
build, all the supported protocols are
enabled by default. You can list all available ones using the
configure option "--list-protocols".
...
...
doc/soc.txt
View file @
f8a45fa1
...
...
@@ -8,9 +8,9 @@ it's a little late for this year's soc (2006).
The Goal:
Our goal in respect to soc is and must be of course exactly one thing and
that is to improve
FFmpeg
, to reach this goal, code must
that is to improve
Libav
, to reach this goal, code must
* conform to the development policy and patch submission guidelines
* must improve
FFmpeg
somehow (faster, smaller, "better",
* must improve
Libav
somehow (faster, smaller, "better",
more codecs supported, fewer bugs, cleaner, ...)
for mentors and other developers to help students to reach that goal it is
...
...
@@ -20,5 +20,5 @@ easy reviewable that again leads us to:
* separation of cosmetic from non-cosmetic changes (this is almost entirely
ignored by mentors and students in soc 2006 which might lead to a suprise
when the code will be reviewed at the end before a possible inclusion in
FFmpeg
, individual changes were generally not reviewable due to cosmetics).
Libav
, individual changes were generally not reviewable due to cosmetics).
* frequent commits, so that comments can be provided early
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