Question / Help LIBAVCODEC_56 not defined in file libavcodec.so.56 with link time reference

[Tetractys]

hi!
on: Linux 4.1.0-3, ubuntu-mate 15.10 beta1 64bit i7 3770K:

since the version in wily (or vivid) repos starts but quit when "Start streaming" is pressd with a segmentation fault i tried to compile everything from start.

ffmpeg compilation/installation ok. NO errors.

obs compilation ok (it ends).

starting obs from shell, this line appears:

obs: relocation error: /usr/lib/libavformat.so.56: symbol avpriv_pix_fmt_bps_mov, version LIBAVCODEC_56 not defined in file libavcodec.so.56 with link time reference

any idea please?

Thanks in advance

 

[Lain]

I can't help but suspect there's some incompatibility with the FFmpeg package you're using. It should typically pick up stuff like that on compilation though. We haven't changed the requirements for FFmpeg for a long time so I'm not sure what's happening on your end.

 

[Tetractys]

Thanks Jim for your answer. I do the following:

- i rolled back to the standard actual 15.04 version of ubuntu. So the problem on topic is at the moment delayed to when the official 15.10 version of ubuntu will show up - this to avoid some strange "beta1 time" issues.
- installed OBS from your PPA.
- installed nvidia 355.11 drivers from PPA.
- switched to 4k resolution 3840x2160 (GTX980 on a 28" 4k monitor 60Hz vertical refresh - Display.Port 1.2 cable)

streaming starts (locally reduced from 4k resolution to 1280x720 and OBS standard settings) on twitch and on youtube correctly but in preview now i see only a solid red color. And this is correctly streamed... on twitch and on youtube the same thing: red solid color.

Note: i deactivated the acceleration via flash settings. Flash Player version 18.0.0.233x

Do you have, please, any idea of this issue?
Thanks a lot