[FFmpeg-user] Specifying lib path when building ffmpeg

[Sven C. Dack]

On 03/11/16 20:58, Matteo Naccari wrote:
> Hi Sven,
>
> Thanks for your reply! I've also tried with the space between the two -L command but same as before.

Did you put the path to your boost libraries in there, too? Alternatively can 
you also try to set the LIBRARY_PATH and LD_LIBRARY_PATH and LD_RUN_PATH variables.

However, because libturing isn't officially supported by the FFmpeg project 
since it's a fork by the BBC Turing project will you have to ask them how their 
code works. You may even ask them to send in patches to the FFmpeg project to 
make it official, but until then is it not supported.

Cheers



> Best regards,
> Matteo
>
> --
> Matteo Naccari, Ph.D., Senior Research Engineer
> BBC R&D, Centre House, London, 56 Wood lane, W12 7SB
> Phone: +44 (0)303 0409640      Skype: matteo_naccari
> Alternative emails: matteo.naccari at polimi.it, matteo.naccari at gmail.com
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>
> ________________________________________
> From: ffmpeg-user [ffmpeg-user-bounces at ffmpeg.org] on behalf of Sven C. Dack [sven.c.dack at sky.com]
> Sent: 03 November 2016 20:57
> To: FFmpeg user questions
> Subject: Re: [FFmpeg-user] Specifying lib path when building ffmpeg
>
> On 03/11/16 18:34, Matteo Naccari wrote:
>> Dear FFmpeg users,
>>
>> I'm trying to build a fork of ffmpeg under Linux (Ubuntu 14.04, gcc 4.82) which then integrates the codec I'm working on (https://github.com/bbc/turingcodec). This codec uses some boost libraries which ship with the source code. However, when I build ffmpeg enabling the Turing codec (--enable-libturing) I can see that the executable of ffmpeg links the system's boost libraries. Is there a way to link to the libraries associated with the Turing codec? I've tried the --extra-ldflags option but no joy. The way I configure the build is the following:
>>
>> PATH="/path/to/source/code/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure --prefix="$HOME/ffmpeg_build" --pkg-config-flags="--static" --extra-cflags="-I$HOME/ffmpeg_build/include" --extra-ldflags="-L$HOME/ffmpeg_build/lib-L/path/to/turing/source/code/build/release/boost" --bindir="$HOME/bin" --enable-gpl --enable-nonfree --enable-libturing
>>
>> Many thanks for your help!
>> Best regards,
>> Matteo
>>
> The line with:
>
> --extra-ldflags="-L$HOME/ffmpeg_build/lib-L/path/to/turing/source/code/build/release/boost"
>
> should say:
>
> --extra-ldflags="-L$HOME/ffmpeg_build/lib -L/path/to/turing/source/code/build/release/boost"
>
> It's missing a blank between the two -L<path> arguments.
>
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