Yes, replacing debian-multimedia packages with testing versions works. I remove debian-multimedia from sources years ago and forgot about it. Maybe you should add this incompatible packages in conflict section?


On 03.02.2018 07:36, Adrian Bunk wrote:
On Sat, Feb 03, 2018 at 12:55:34AM +0300, Karelin Timofey wrote:
Package: blender
Version: 2.79+dfsg0-3+b2
Severity: grave
Justification: renders package unusable

Dear Maintainer, Blender=2.79+dfsg0-3+b2 did not start with this error:
"blender: symbol lookup error: /usr/lib/libOpenColorIO.so.1: undefined symbol: 
_ZN4YAML6detail9node_data12empty_scalarB5cxx11E".
Works for me.

...
Versions of packages blender depends on:
...
ii  libavcodec57                      10:3.3.3-dmo3
ii  libavdevice57                     10:3.3.1-dmo2
ii  libavformat57                     10:3.3.3-dmo3
ii  libavutil55                       10:3.3.3-dmo3
...
ii  libswscale4                       10:3.3.3-dmo3
...
The packages from deb-multimedia.org are known to sometimes interact
badly with packages from Debian, in this case you have due to the
epoch an older version of the ffmpeg libraries installed than what
is in Debian.

What does
   dpkg -l | grep dmo
output, and does installing the Debian versions of these libraries
instead fix the problem?

It is also possible that your problem might be unrelated to that,
which version of the libyaml-cpp0.5v5 package do you have installed?

cu
Adrian


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