checking libavutil/avutil.h usability... no

[marc.assin]

Hi,

I'm a newbie.
During the configure process, I see these warnings/errors

checking libavutil/avutil.h usability... no
checking libavutil/avutil.h presence... yes
configure: WARNING: libavutil/avutil.h: present but cannot be compiled
configure: WARNING: libavutil/avutil.h: check for missing prerequisite headers?
configure: WARNING: libavutil/avutil.h: see the Autoconf documentation
configure: WARNING: libavutil/avutil.h: section "Present But Cannot Be Compiled"
configure: WARNING: libavutil/avutil.h: proceeding with the compiler's result
configure: WARNING: ## ------------------------------------------------------------------------- ##
configure: WARNING: ## Report this to http://www.zoneminder.com/forums/ - Please check FAQ first ##
configure: WARNING: ## ------------------------------------------------------------------------- ##
checking for libavutil/avutil.h... no

although I've issued these commands

sudo apt-get install libavcodec-dev libavdevice-dev libavfilter-dev libavformat-dev \
libavutil-dev libpostproc-dev libswscale-dev libjpeg-dev
sudo apt-get install libssl-dev libbz2-dev libpcre3-dev

issuing them a second time confirms they were already installed
I guess a path is missing somewhere

Any hint, please ?

PS: I think my problem is ffmpeg related.
When, on the configure command line, I specify --with-ffmpeg=/usr/bin/ffmpeg (as it really is) I get a strange error, compiler not running
When, I specify --with-ffmpeg=/usr gthe configure runs till the end but with the above mentionned warning
May be I miss installed ffmpeg ?
Any recommendation ?

[CKrypto]

Have you tried this?http://www.zoneminder.com/wiki/index.ph ... _libraries