BUG: motion will not compile with ffmpeg

I am running Slackware Linux, version 12.2 with kernel 2.6.27.7-smp

I am trying to compile the "motion" program to include ffmpeg support.

ffmpeg needs: BZ2_bzDecompressInit BZ2_bzDecompress BZ2_bzDecompressEnd

I downloaded the 1.0.6 tarball of bzip2.

I see the entries of the utilites above in bzlib.c

I compile and install bzip2.
I compile and install ffmpeg, then motion.

At the end of the motion compilation, I get:

/usr/local/src/ffmpeg/libavformat/matroskadec.c:927: undefined reference to `BZ2_bzDecompressInit'
/usr/local/src/ffmpeg/libavformat/matroskadec.c:936: undefined reference to `BZ2_bzDecompress'
/usr/local/src/ffmpeg/libavformat/matroskadec.c:939: undefined reference to `BZ2_bzDecompressEnd'
/usr/local/src/ffmpeg/libavformat/matroskadec.c:939: undefined reference to `BZ2_bzDecompressEnd'

The above errors occur when I compile "motion" !! Not when I compile ffmpeg!

The sources to bzip2-1.0.6.tar.gz and ffmpeg-0.6.1.tar.gz are too large to e-mail, so I am just giving you the URLs.

http://www.linux.com/archive/feature/114118

http://ffmpeg.org/

http://bzip.org/downloads.html

What is wrong? Other folks on the internet get the same error messages for programs other than "motion". But nobody has a solution, so far as I can tell.

If I configure "motion" --without-ffmpeg, then motion compiles and works, but with no mpeg output.

Thanks, Ed Kribbs

OK, I subsequently worked around the problem.

One item is that there is a separate makefile in bzip2-1.0.6 called Makefile-libbz2_so. This is the file that needs to be run under "make" to create /lib/libbz2.so.... that you have to have to satisfy the "undefined reference"s above.

Next, under motion-3.2.12, the Makefile that is created from "configure" has a bug. The line describing the libraries is:

LIBS = -lm -lpthread -ljpeg -L/usr/local/lib -lavformat -lavcodec -lavutil -lm -lz -L/usr/lib -lmysqlclient -lz

Notice there are two "-lz"s, and consequently libbz2 never gets referenced.

Change that line in Makefile to have the last "-lz" changed to -lbz2 as below so that libbz2.so gets recognized.

LIBS = -lm -lpthread -ljpeg -L/usr/local/lib -lavformat -lavcodec -lavutil -lm -lz -L/usr/lib -lmysqlclient -lbz2

Lastly, there is conflict between the ffmpeg-0.6.1 and motion-3.2.12.

In ffmpeg-0.6.1, in the libavformat directory, there is file.c which has a structure called "file_protocol". This conflicts with the file ffmpeg.c in motion-3.2.12 which has the same structure name, "file_protocol", but with slightly different content.

They did not seem to be shared, so in ffmpeg.c in motion-3.2.12, I changed "file_protocol" to "file_protocol2" in the structure definition, and in the four places where is it referenced in that file.

Then everything compiled and all that I tried to run, worked.

So folks, you need to fix the configure so that it creates Makefile correctly with the -lbz2, and fix ffmpeg.c so that it does not conflict "file_protocol" with ffmpeg-0.6.1/libavformat/file.c

/usr/local/src/ffmpeg/libavformat/matroskadec.c:927: undefined reference to `BZ2_bzDecompressInit'
/usr/local/src/ffmpeg/libavformat/matroskadec.c:936: undefined reference to `BZ2_bzDecompress'
/usr/local/src/ffmpeg/libavformat/matroskadec.c:939: undefined reference to `BZ2_bzDecompressEnd'
/usr/local/src/ffmpeg/libavformat/matroskadec.c:939: undefined reference to `BZ2_bzDecompressEnd'

The above errors occur when I compile "motion" !!  Not when I compile ffmpeg!

Environment

Motion version:	3.2.12
ffmpeg version:
Shared libraries:	ffmpeg, libbz2
Server OS:	slackware linux 12.2, kernel 2.6.27.7-smp

-- EdwinKribbs - 28 Nov 2010

Follow up

Sorry i can reproduce your issue.

It looks that is related to some weird issue you have with ffmpeg and their dependencies , not with motion.

Anyway you can try to run this with SVN or GIT version of motion.

Cheers,

-- AngelCarpintero - 29 Oct 2011

Fix record