[mythtv-users] Problems with libmythavcodec: undefined symbol

[John Pilkington]

On 16/07/18 23:22, R. G. Newbury wrote:
> I am missing a library, but I have no idea which one!
> 
> mythfrontend: symbol lookup error: /usr/local/lib/libmythavcodec.so.57: 
> undefined symbol: x265_api_get_79
> 
> 
> I am trying to get a frontend running on Fedora 27. It worked nicely on 
> Fedora 25. This was a full 'bare-metal' install. Myth is compiled from 
> master (a rather dated version, matching the main mythbox.
> 
> BOth the main mythbox and this desktop have this, in /usr/local/lib
> 
> [root at tor1 lib]# ls -al libmythavcodec*
> lrwxrwxrwx 1 root root       27 Jun 29  2017 libmythavcodec.so -> 
> libmythavcodec.so.57.64.100
> lrwxrwxrwx 1 root root       27 Jul 15 23:58 libmythavcodec.so.55 -> 
> libmythavcodec.so.57.64.100
> lrwxrwxrwx 1 root root       27 Jun 29  2017 libmythavcodec.so.57 -> 
> libmythavcodec.so.57.64.100
> -rwxr-xr-x 1 root root 14450872 Jul 15 23:39 libmythavcodec.so.57.24.102
> -rwxr-xr-x 1 root root 12459768 Jun 29  2017 libmythavcodec.so.57.64.100
> 
> 
> And I get this on the desktop in the mythfrontend output:
> MythPlugin::init() dlerror: libmythavcodec.so.55: cannot open shared 
> object file: No such file or directory
> 
> The main system comes up, and I can set recordings etc etc. but when I 
> attempt to play anything, I get this:
> 
> mythfrontend: symbol lookup error: /usr/local/lib/libmythavcodec.so.57: 
> undefined symbol: x265_api_get_79
> 
> And realelf tells me that, yes, that symbol is undefined in 
> libmythavcodec.so.57(.64.100).
> 
> Can anyone assist me and point me to the library which provides this 
> symbol. I have spent some time trying to match the mythbox' installation 
> with the desktop, but no joy...
> 
> Geoff

I'm at my sl7 box running master head from a week or so ago built with 
Gary B's packaging script.  I see this:

[root at HP_Box lib]# cd /lib64
[root at HP_Box lib64]# ls -al libmythavcodec*
lrwxrwxrwx. 1 root root       27 Jul  3 15:24 libmythavcodec.so -> 
libmythavcodec.so.58.18.100
lrwxrwxrwx. 1 root root       27 Jul  3 15:24 libmythavcodec.so.58 -> 
libmythavcodec.so.58.18.100
-rwxr-xr-x. 1 root root 13107640 Jul  3 13:55 libmythavcodec.so.58.18.100
[root at HP_Box lib64]#

I have a similar box with f27 that I can examine tomorrow if that might 
help.

John P