Re: [Libav-user] How to compile dev from source

[Peter Kroon]

Hello,

AS mentiond in the first post I used this install guide for CentOS:
https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
I followed the path/steps written in the article.

First I've added --enable-shared to the configure command. This did not
gave the result I was looking for.
--disable-static and  --enable-shared were needed.
This allowed me to compile the program below with gcc -g test.c -o test -W
-Wall -Wextra -Werror -pedantic

=
#include 
#include 
#include 
#include 
#include 
#include 
int main()
{
 printf("The echo..n\");
 return 0;
}
=

However, when I added av_register_all(); the program would not compile.
To solve this I ran the code below in console.

=
C_INCLUDE_PATH=/root/ffmpeg_build/include
export C_INCLUDE_PATH
#debug
echo $C_INCLUDE_PATH
LIBRARY_PATH=/root/ffmpeg_build/lib
export LIBRARY_PATH
#debug
echo $LIBRARY_PATH
LD_LIBRARY_PATH=/root/ffmpeg_build/lib
export LD_LIBRARY_PATH
#debug
echo $LD_LIBRARY_PATH
=

Now add av_register_all(); above the printf and I was able to compile the
program with:
gcc -g test.c -o test -W -Wall -Wextra -Werror -pedantic -lavcodec
-lavformat -lavutil

And the example programs compiled as well.

2017-07-24 10:10 GMT+02:00 Nicolas George :

> Le sextidi 6 thermidor, an CCXXV, Peter Kroon a écrit :
> > e.g. the program below will not compile
> >
> > // gcc -g test.c -o test -W -Wall -Wextra -Werror -pedantic -lavcodec
> > -lavformat -lavutil
>
> Without knowing how exactly you installed FFmpeg and the compiler's
> output, I can only guess that the paths for includes and libraries (-I
> and -L) are not correct.
>
> Also, I hope you realize that this command-line tells gcc to adhere to a
> language that was already obsolete in the last century.
>
> > 2017-07-24 9:16 GMT+02:00 Peter Kroon  re5jqeeqqe8avxtiumw...@public.gmane.org>:
>
> Please do not top-post on these mailing-lists. If you do not know what
> it means, look it up.
>
> Regards,
>
> --
>   Nicolas George
>
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Re: [Libav-user] How to compile dev from source

[Lou]

On Sun, Jul 23, 2017, at 11:16 PM, Peter Kroon wrote:
> I mean by "the dev packages" the header files and libraries.
> But they are not installed when compiled from source.
> I've tried CentOS and FreeBSD. On both OS the header files and libraries
> are not found.

Using that guide "installs" these files to ~/ffmpeg_build. It does it
this way to avoid installing anything to any system directories (and
most users just want the resulting ffmpeg binary anyway). Point your
compiler to that directory, or if desired you can install the files
wherever you want (such as /usr/local/ where I'm assuming you were
assuming they would be).

$ cd ~/ffmpeg_sources/ffmpeg
$ make distclean
$ ./configure
$ make
# make install
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Re: [Libav-user] How to compile dev from source

[Nicolas George]

Le sextidi 6 thermidor, an CCXXV, Peter Kroon a écrit :
> e.g. the program below will not compile
> 
> // gcc -g test.c -o test -W -Wall -Wextra -Werror -pedantic -lavcodec
> -lavformat -lavutil

Without knowing how exactly you installed FFmpeg and the compiler's
output, I can only guess that the paths for includes and libraries (-I
and -L) are not correct.

Also, I hope you realize that this command-line tells gcc to adhere to a
language that was already obsolete in the last century.

> 2017-07-24 9:16 GMT+02:00 Peter Kroon 
> :

Please do not top-post on these mailing-lists. If you do not know what
it means, look it up.

Regards,

-- 
  Nicolas George


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Re: [Libav-user] How to compile dev from source

[Peter Kroon]

e.g. the program below will not compile

// gcc -g test.c -o test -W -Wall -Wextra -Werror -pedantic -lavcodec
-lavformat -lavutil

#include 
#include 
#include 
#include 
#include 
#include 

int main()
{
 av_register_all();
 printf("The echo..n\");
 return 0;
}


The program will copile when I install ffmpeg on FreeBSD with pkg install
ffmpeg.

2017-07-24 9:16 GMT+02:00 Peter Kroon :

> I mean by "the dev packages" the header files and libraries.
> But they are not installed when compiled from source.
> I've tried CentOS and FreeBSD. On both OS the header files and libraries
> are not found.
>
> 2017-07-24 4:14 GMT+02:00 jing zhang :
>
>> The header files and libraries will be installed.
>>
>> 2017-07-23 1:58 GMT+08:00 Lou :
>>
>>> On Thu, Jul 20, 2017, at 06:20 AM, Peter Kroon wrote:
>>> > Hello,
>>> >
>>> > I've managed to compile ffmpeg successfully with these instructions:
>>> > https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
>>> > However, the dev packages are not present. How do I compile/add the dev
>>> > packages?
>>>
>>> What do you mean by, "the dev packages"?
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>>>
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>>
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>
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Re: [Libav-user] How to compile dev from source

[Peter Kroon]

I mean by "the dev packages" the header files and libraries.
But they are not installed when compiled from source.
I've tried CentOS and FreeBSD. On both OS the header files and libraries
are not found.

2017-07-24 4:14 GMT+02:00 jing zhang :

> The header files and libraries will be installed.
>
> 2017-07-23 1:58 GMT+08:00 Lou :
>
>> On Thu, Jul 20, 2017, at 06:20 AM, Peter Kroon wrote:
>> > Hello,
>> >
>> > I've managed to compile ffmpeg successfully with these instructions:
>> > https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
>> > However, the dev packages are not present. How do I compile/add the dev
>> > packages?
>>
>> What do you mean by, "the dev packages"?
>> ___
>> Libav-user mailing list
>> Libav-user@ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/libav-user
>>
>
>
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Re: [Libav-user] How to compile dev from source

[jing zhang]

The header files and libraries will be installed.

2017-07-23 1:58 GMT+08:00 Lou :

> On Thu, Jul 20, 2017, at 06:20 AM, Peter Kroon wrote:
> > Hello,
> >
> > I've managed to compile ffmpeg successfully with these instructions:
> > https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
> > However, the dev packages are not present. How do I compile/add the dev
> > packages?
>
> What do you mean by, "the dev packages"?
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>
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Re: [Libav-user] How to compile dev from source

[Lou]

On Thu, Jul 20, 2017, at 06:20 AM, Peter Kroon wrote:
> Hello,
> 
> I've managed to compile ffmpeg successfully with these instructions:
> https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
> However, the dev packages are not present. How do I compile/add the dev
> packages?

What do you mean by, "the dev packages"?
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