[FFmpeg-user] Compiling independent ffmpeg

[Yellow Penguin]

The package liblensfun1 is a dependency of liblensfun-dev. Maybe you used
aptitude or used apt-get autoremove at a later time to remove any orphaned
package? If it got installed as a dependency of liblensfun-dev, it will no
longer be a dependency of any package after you uninstalled that. The
library liblensfun1.so.1 that you were missing is part of the liblensfun1
package, not the -dev package. The same applies to the other ones. It's
safe to remove the -dev packages, but you will have to ensure that the
corresponding runtime packages are installed, and they are easily lost if
you don't explicitly install them or mark them as a dependency of something
else.

On Sun, Jan 12, 2020 at 9:22 PM Matthew Webber <quickhare at hotmail.com>
wrote:

> Carl,
>
> Thanks for this. I definitely did uninstall liblensfun-dev and not
> liblensfun. It may be that one is dependent on another, but that is
> definitely what I uninstalled through sudo apt-get remove liblensfun-dev.
>
> Other packages I installed during compilation were subsequently
> uninstalled without issue. Therefore I see it as an ffmpeg compilation,
> otherwise I'd see every other feature I uninstalled failing. I noticed
> the make and make install steps created and copied the other dependencies.
>
> I don't mind dynamic linking, but I assumed the compilation step of
> ffmpeg also compiled any dependent libraries it used. Obviously this is
> not clear in guides and instructions that you'd need to leave all the
> dev packages you use after compilation.
>
> Matthew Webber
> (QuickHare at Hotmail.com)
>
> On 12/01/2020 20:07, Carl Eugen Hoyos wrote:
> > Am So., 12. Jan. 2020 um 19:38 Uhr schrieb Matthew Webber
> > <quickhare at hotmail.com>:
> >
> >> I compiled ffmpeg on Ubuntu 18.04 perfectly fine. I installed a whole
> >> load of dev packages and compiled with lots of options, and all went
> >> smoothly.
> >>
> >> However when I removed the packages liblensfun-dev, libmodplug-dev,
> >> libcodec2-dev and libfdk-aac-dev ffmpeg failed to work. Looking deeper
> >> it is now missing liblensfun.so.1, libmodplug.so.1, libcodec2.so.0.7 and
> >> libfdk-aac.so.1.
> > So you did not uninstall liblensfun-dev but liblensfun
> >
> >> Re-installing those packages makes those components
> >> available and the program runs again.
> >>
> >> Does the compilation not create these files or embed them into ffmpeg?
> > No (at least not in general), and this question is not related to FFmpeg.
> > Once upon a time, no dynamic libraries existed, meaning that every binary
> > on a system contained copies of all linked libraries. As this wastes a
> lot of
> > space, dynamic linking was invented (decades ago).
> > Typical compilers default to dynamic linking.
> >
> >> Are there any options I need to ensure these are created so I no longer
> >> need these packages? I want to have program files that will work without
> >> any of the other packages installed.
> > You can add "--extra-ldflags=-static" to force static linking but your
> > distribution most likely will not provide a static lensfun library, so
> you
> > will have to compile all dependencies that you want yourself to
> > provide the necessary static libraries.
> >
> > But as said, all this is not related to FFmpeg.
> >
> > Carl Eugen
> > _______________________________________________
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> > ffmpeg-user at ffmpeg.org
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> >
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>
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