ffmpeg can be built with support for lots of different video
formats. Anybody know exactly how the package is built for Slackware64
15.0?

I had a look into the corresponding Slackbuild file, as
distributed with Slackware64 15.0, and it would seem that the decision as
to whether or not add support for some specific format is done on the
fly, depending on whether or not the necessary shared libraries are
already present in the system. Which, of course, is something I cannot
know, when it comes to the ffmpeg package distributed with Slackware64
15.0.

The thing is, I am trying to do something with ffmpeg that
requires the x264 encoder, and ffmpeg claims not to know about such
encoder.

On Wed, 11 May 2022 00:45:00 -0000 (UTC), Harold Johanssen wrote:

> ffmpeg can be built with support for lots of different video formats.
> Anybody know exactly how the package is built for Slackware64 15.0?
>
> I had a look into the corresponding Slackbuild file, as
> distributed with Slackware64 15.0, and it would seem that the decision
> as to whether or not add support for some specific format is done on the
> fly, depending on whether or not the necessary shared libraries are
> already present in the system. Which, of course, is something I cannot
> know, when it comes to the ffmpeg package distributed with Slackware64
> 15.0.
>
> The thing is, I am trying to do something with ffmpeg that
> requires the x264 encoder, and ffmpeg claims not to know about such
> encoder.

To answer my own question, I just noticed that when launching
ffmpeg it prints out the following:

configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64
--docdir=/usr/doc/ffmpeg-4.4.1/html --mandir=/usr/man --disable-debug --
enable-shared --disable-static --enable-gpl --enable-version3 --enable-
avresample --arch=x86_64 --disable-encoder=aac --enable-libfontconfig --
enable-libfreetype --enable-libfribidi --enable-gnutls --enable-libbluray
--enable-libcaca --enable-libcdio --enable-frei0r --enable-openal --
enable-libopus --enable-libspeex --enable-libssh --enable-libtheora --
enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --
enable-libwebp --enable-libmp3lame --enable-opencl --enable-opengl --
enable-libopenjpeg --enable-libpulse --enable-libsmbclient --enable-
libxml2 --enable-librsvg --enable-libdrm

So, no x264 support :-( I'll try to build it with x264 support.

On Wed, 11 May 2022 01:45:17 -0000 (UTC), Harold Johanssen wrote:

> On Wed, 11 May 2022 00:45:00 -0000 (UTC), Harold Johanssen wrote:
>
>> ffmpeg can be built with support for lots of different video formats.
>> Anybody know exactly how the package is built for Slackware64 15.0?
>>
>> I had a look into the corresponding Slackbuild file, as
>> distributed with Slackware64 15.0, and it would seem that the decision
>> as to whether or not add support for some specific format is done on
>> the fly, depending on whether or not the necessary shared libraries are
>> already present in the system. Which, of course, is something I cannot
>> know, when it comes to the ffmpeg package distributed with Slackware64
>> 15.0.
>>
>> The thing is, I am trying to do something with ffmpeg that
>> requires the x264 encoder, and ffmpeg claims not to know about such
>> encoder.
>
> To answer my own question, I just noticed that when launching
> ffmpeg it prints out the following:
>
> configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64
> --docdir=/usr/doc/ffmpeg-4.4.1/html --mandir=/usr/man --disable-debug --
> enable-shared --disable-static --enable-gpl --enable-version3 --enable-
> avresample --arch=x86_64 --disable-encoder=aac --enable-libfontconfig --
> enable-libfreetype --enable-libfribidi --enable-gnutls
> --enable-libbluray --enable-libcaca --enable-libcdio --enable-frei0r
> --enable-openal -- enable-libopus --enable-libspeex --enable-libssh
> --enable-libtheora -- enable-libv4l2 --enable-libvidstab
> --enable-libvorbis --enable-libvpx -- enable-libwebp --enable-libmp3lame
> --enable-opencl --enable-opengl -- enable-libopenjpeg --enable-libpulse
> --enable-libsmbclient --enable- libxml2 --enable-librsvg --enable-libdrm
>
> So, no x264 support :-( I'll try to build it with x264 support.

Well, that works fine: I rebuilt from source, using the software
delivered with Slackware, making sure that x264 is supported, replaced
the ffmpeg packaged shipped with this one, and it worked as expected.

On 5/10/22 22:24, Harold Johanssen wrote:

---------------

>> So, no x264 support :-( I'll try to build it with x264 support.
>
> Well, that works fine: I rebuilt from source, using the software
> delivered with Slackware, making sure that x264 is supported, replaced
> the ffmpeg packaged shipped with this one, and it worked as expected.
You might take a look here:

http://www.slackware.com/~alien/slackbuilds/ffmpeg/

Rinaldi
--
Critic, n.:
A person who boasts himself hard to please because nobody tries
to please him. -- Ambrose Bierce, "The Devil's Dictionary"

> On 5/10/22 22:24, Harold Johanssen wrote:
>
>>> So, no x264 support :-( I'll try to build it with x264 support.
>>
>> Well, that works fine: I rebuilt from source, using the software
>> delivered with Slackware, making sure that x264 is supported, replaced
>> the ffmpeg packaged shipped with this one, and it worked as expected.

These are my notes from rebuild of ffmpeg from source for Slack 15.0:

----------
To build ffplay, need to install SDL2 library. I had to install new
version of libass also.

In configure: --enable-libass --enable-libmp3lame --enable-libpulse
--enable-libv4l2 --enable-libx264 --enable-gpl --libdir=/usr/local/lib64
----------

If you want or need ffplay, it is enabled automatically, but you must
install SDL2 library. Also, if I'm remembering correctly if you
--enable-libx264 you must also --enable-gpl. (During configure it will
tell you this.) I use the libass library for subtitle manipulation, so
I installed a new version of that and enabled it.

Hope this helps some.

....Edwin

On Tue, 10 May 2022 22:29:28 -0500, Rinaldi wrote:

> On 5/10/22 22:24, Harold Johanssen wrote:
>
> ---------------
>
>>> So, no x264 support :-( I'll try to build it with x264 support.
>>
>> Well, that works fine: I rebuilt from source, using the software
>> delivered with Slackware, making sure that x264 is supported, replaced
>> the ffmpeg packaged shipped with this one, and it worked as expected.
> You might take a look here:
>
> http://www.slackware.com/~alien/slackbuilds/ffmpeg/
>
> Rinaldi

beware aliens deps
it was easier to remove, blacklist ad build from source, just like ive
been doing since day dot