Re: FFmpeg-8.0 Warning

On 9/23/25 6:40 PM, Bruce Dubbs ([email protected] via blfs-dev 
Mailing List) wrote:
> On 9/23/25 5:16 PM, Joe Locash ([email protected] via blfs-dev Mailing 
> List) wrote:
>> On 9/23/25 1:45 PM, Rahul Chandra ([email protected] via 
>> blfs-dev Mailing List) wrote:
>>> We can actually do more then just that. Because Firefox only links 
>>> to ffmpeg at runtime, you can actually keep both 8.0 and 7.1.1 
>>> installed (what I've been doing for the last week). You essentially 
>>> just have to keep all the .so files except the ones that should link 
>>> to the latest version (i.e ending in just .so and not .so.58). I've 
>>> been doing this for the last week and firefox works great for me and 
>>> packages are still linking to ffmpeg 8.0 at build time. Something 
>>> similar to this: 
>>> https://gitlab.archlinux.org/archlinux/packaging/packages/ffmpeg4.4 
>>
>> I would say this is the best approach. Firefox-140 only needs the 
>> ffmpeg-7.1 libs and that's easy to do. Do a normal build of ffmpeg-7 
>> but only install the libs
>> :
>>
>>    make DESTDIR=dest install
>> as root:
>>    for lib in dest/usr/lib/*; do
>>      if [[ $lib == *.so ]]; then
>>        ln -srf -- dest/usr/lib/"$(readlink "$lib")" "$lib"
>>      elif [[ ! -d $lib ]]; then
>>        mv "$lib" /usr/lib
>>      fi
>>    done
>
> I'm not sure if I got this right, but I installed ffmpeg8 as a 
> DESTDIR=/opt/ffmpeg8/
>
> Then I created a script:
>
> $ cat firefox-ffmpeg8
> #! /usr/bin/bash
>
> export LD_LIBRARY_PATH=/opt/ffmpeg8/usr/lib/
> firefox
>
>
> And ran a random youtube video.  It seemed to play fine, but I'm not 
> sure if it picked up the right libraries.
>
> Is there a way to see what libraries are being used?

I'm not sure. If you have ffmpeg-7 installed you will not see an issue.

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