[Libav-user] build FFMPEG ubuntu 16

[Richard Hussong]

On Mon, Jun 8, 2020 at 8:16 AM retep peter <retepik at gmail.com> wrote:

> Hello Richard,
> How can I download ffmpeg 2.8.15 source for Ubuntu developers?
>

You can download the original source package and the Ubuntu patches from
https://packages.ubuntu.com/source/xenial/ffmpeg (look near the bottom of
the page). You'll probably need to use the Ubuntu build tools to apply the
patches and build. I can't help you there.

- Richard


> Thanks
> retepik
>
> ne 7. 6. 2020 o 1:45 Richard Hussong <rhussong at westpond.com> napísal(a):
>
>>
>> On Fri, Jun 5, 2020 at 11:33 AM retep peter <retepik at gmail.com> wrote:
>>
>>> I need a advice :) I have tried compile ffmpeg 2.8.15 from source under
>>> Ubuntu 16 LTS. I need compile it for one SDK, I can't use ffmpeg from
>>> repository. I compiled ffmpeg successfully. But I have got issues with my
>>> specify SDK, when I try compile my code with SDK:
>>>
>>> SDK.so: undefined reference to `av_rescale_q at LIBAVUTIL_FFMPEG_54'
>>>
>>> I suppose that issues are in symbols name. I tried read symbols with
>>>
>>> readelf -s libavutil-ffmpeg.so.54
>>>
>>> I get in my compiled ffmpeg something like this
>>>
>>>    158: 0000000000024170    55 FUNC    GLOBAL DEFAULT   12 av_rescale_q@@LIBAVUTIL_54
>>>
>>> I tried this with libavutil-ffmpeg.so.54 from repository and i get
>>>
>>>    158: 0000000000024170    55 FUNC    GLOBAL DEFAULT   12 av_rescale_q@@LIBAVUTIL_FFMPEG_54
>>>
>>> I suppose that I need add a suffix "FFMPEG" to symbols name. I use this
>>> configuration for build ffmpeg, it same as configuration of build from
>>> repository :
>>>
>>> sudo ./configure --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
>>>
>>> Could you help me how add suffix "-ffmpeg" to symbols name? Thanks
>>>
>> The libavxxx-ffmpeg libraries are supplied by the Ubuntu developers to
>> support the Ubuntu version of ffmpeg. If you build and install ffmpeg
>> yourself (not from the Debian ffmpeg source package), it will build the
>> "normal" libavxxx libraries and build ffmpeg against them, and those
>> libraries will be installed somewhere, by default /usr/local/lib, I
>> believe. I don't know for sure if libavutil.so.54 is compatible with
>> libavutil-ffmpeg.so.54, though it is likely that it is. If so, you may be
>> able to use LD_PRELOAD to load the libraries you need before running, but I
>> don't know if your SDK allows that, or if it would necessarily work.
>>
>> - Richard
>>
>>> Best Regard
>>>
>>> retepik
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>>
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>
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