On 29/07/16 17:23, Yasha Karant wrote:
> I need for SL7 the equivalents to:
>
> |sudo apt-get install -y libav-tools ubuntu-restricted-extras|
> |sudo apt-get install -y libavcodec-extra-54 libavformat-extra-54|
>
> |to provide libav4 for a Mozilla Firefox extension (|Video DownloadHelper)
>
> Thus far, yumex has not found these nor does a search on the web.  Any
> suggestions (including aURL for a downloable RPM or set thereof) would
> be most appreciated.
>
> Yasha Karant


One may have to accept that SL7 is less av-oriented than *buntu, but 
this link deals with the same problem, and suggests that

  "sudo ln -s /usr/bin/ffmpeg /usr/bin/avconv"

might be a solution.  There's no indication that anyone has tried it.  I 
haven't :-)

... and of course you will need to have ffmpeg installed.

https://groups.google.com/forum/#!topic/video-downloadhelper-q-and-a/BzXqazzZYRU

John P