[SOLVED] FFmpeg confusion

[laxmidd50]

Hello,
The system I am working with is Debian Jessie (cannot change for now).
I am trying to use a library that requires FFmpeg. When loading the .so it says:

Code: Select all

error while loading shared libraries: libswscale-ffmpeg.so.3: cannot open shared object file: No such file or directory

It also depends on libavcodec-ffmpeg56, libavformat-ffmpeg56, libswscale-ffmpeg3, and libavutil-ffmpeg54
I added jessie-backports to my sources.list, and installed ffmpeg. This gave me libavcodec.so.57, libavformat.so.57, libswscale.so.4, and libavutil.so.55. All of these versions are one version newer than what I need. Also, the packages don't end in -ffmpeg. I did try to make symbolic links like so:

Code: Select all

libswscale-ffmpeg.so.3 -> libswscale.so.4

But that, predictably, didn't work.

Code: Select all

/usr/lib/i386-linux-gnu/libswscale-ffmpeg.so.3: version `LIBSWSCALE_FFMPEG_3' not found (required by /opt/bf/lib/libptgreyvideoencoder.so.1)

I then installed "libswscale3" from the repository and created a symbolic link:

Code: Select all

sudo ln libswscale.so.3 libswscale-ffmpeg.so.3

With the same results:

Code: Select all

/usr/lib/i386-linux-gnu/libswscale-ffmpeg.so.3: version `LIBSWSCALE_FFMPEG_3' not found (required by /opt/bf/lib/libptgreyvideoencoder.so.1)

Though, I think this libswscale3 in the repo is not actually from ffmpeg, but libav?

I read through this thread: viewtopic.php?f=6&t=129299&p=621320&hilit=+libswscale+ffmpeg+#p621320
But am still confused about this. Somebody mentioned snapshot.debian.org, but that is not the right way to do it and I should edit out the -ffmpeg dependencies, but I'm not sure how.
Any help on this would be appreciated, Thanks!

[peter_irich]

Is libswscale-dev installed?

Peter.

[laxmidd50]

Is libswscale-dev installed?

No. I just installed it, didn't help.

[debiman]

I am trying to use a library that requires FFmpeg.

what is this mysterious library, how did it find its way onto your system, and how are you using it?

[laxmidd50]

what is this mysterious library, how did it find its way onto your system, and how are you using it?

Yes sorry. https://www.ptgrey.com/spinnaker-sdk
It's a proprietary sdk for a camera. It's closed source, and I only have the .so's. It seems that they developed this for Ubuntu 16.04, so that is where the incompatibilities come from. I will attempt to contact them also, but I don't expect them to be helpful unfortunately. This is an existing system I'm writing software for which has to stay on Jessie.
I'm writing software to use the camera, but I can't even load the runtime dependencies right now.

[stevepusser]

You need a version of this backported for Jessie:

http://snapshot.debian.org/package/ffmp ... .6-1:2b:b3

or if that doesn't work, the ffmpeg version in Ubuntu 16.04 ported over to Jessie.

I'll see it I can easily set it up in an OBS Jessie repository...

Yeah, not that difficult. I'll port over the Ubuntu 16.04 ffmpeg to provide the exact match. Building now...

[laxmidd50]

Yes thank you, I think that makes sense. It needs more than just the libswscale-ffmpeg3 though. It also needs libavcodec-ffmpeg56, libavformat-ffmpeg56, and libavutil-ffmpeg54.
Edit: Just saw your edit, I think that would work, thanks!

[stevepusser]

Yes thank you, I think that makes sense. It needs more than just the libswscale-ffmpeg3 though. It also needs libavcodec-ffmpeg56, libavformat-ffmpeg56, and libavutil-ffmpeg54.

Those will all get built from the Ubuntu source package and appear in the OBS repo when finished. The numbering scheme allows these to be added to your system without breaking other packages that depend on something like libavcodec55, for example.


We need to be grateful to SUSE for providing this free service; here's the current progress:

https://build.opensuse.org/project/show ... ert:ffmpeg

[stevepusser]

OK, 32-bit's done, so the instructions were generated. 64-bit should be done pretty soon.

To add the repo, run this command in a root terminal. Sudo users can become root with "sudo -i".

Code: Select all

echo 'deb http://download.opensuse.org/repositories/home:/stevepassert:/ffmpeg/Debian_8.0/ /' > /etc/apt/sources.list.d/ffmpeg.list

Then, as a normal user, download the repository key:

Code: Select all

rm -f Release.key && wget -nv https://download.opensuse.org/repositories/home:stevepassert:ffmpeg/Debian_8.0/Release.key -O Release.key

Switch back to root in the terminal, then install the key and update your package database to see the new packages:

Code: Select all

apt-key add - < Release.key
apt-get update

[laxmidd50]

It worked perfectly, thank you for all your help!

For future deployment, should I copy these off to a local repository? I imagine this will never make it's way into an official jessie repo, correct?

[stevepusser]

No, they'll never be in an official repo. Do you have all the debs already? Usually they are on your machine if you installed from my repo in /var/cache/apt/archives, but you can also just surf to the repo address in the instructions and manually download them, though ffmpeg generates a lot of packages for sure.