[Ffmpeg-devel] BUG: x264 and pthreads

[Justin Ruggles]

Joshua Boyd wrote:
> FFmpeg requires pthreads when using x264.  --enable-x264 alone fails,
> but --enable-x264 and --enable-pthreads works.
> 
> The first way, ./configure says:
> ERROR: x264 not found
> and config.err contains:
> gcc -c -o /tmp/ffmpeg-conf-1528-30906-27017.o
> /tmp/ffmpeg-conf-6644-30906-19992.
> c
> gcc -Wl,--warn-common -o /tmp/ffmpeg-conf-10696-30906-32630
> /tmp/ffmpeg-conf-152
> 8-30906-27017.o -lm -lz -ldts -lgsm -lvorbis -lvorbisenc -logg -logg
> -lx264
> /usr/lib/gcc/i486-linux-gnu/4.0.3/../../../../lib/libx264.a(encoder.o):
> In funct
> ion `x264_encoder_encode': undefined reference to `pthread_create'
> /usr/lib/gcc/i486-linux-gnu/4.0.3/../../../../lib/libx264.a(encoder.o):
> In funct
> ion `x264_encoder_encode': undefined reference to `pthread_join'
> collect2: ld returned 1 exit status
> ERROR: x264 not found
> 
> I found this on ubuntu 6.06 (which uses a Febuary cvs version of x264)
> and a fresh checkout from svn of ffmpeg.  This is different from
> Monday's issue with x264.  Yesterday, someone on ffmpeg-users complained
> of the same issue (he didn't say what version of x264 or linux
> distribution he was using).
> 
> It seems to me that the ./configure script just needs to know of the
> dependence like the way is says that libogg must be included to use
> libvorbis. 
> 
> I've never dug into the configure script, so I'm just posting a bug
> report for now.  Maybe I will come up with a patch as well.
> 

I ran into this problem as well. x264 can be compiled with or without
pthreads. If you use x264 in FFmpeg, pthread usage has to match your
x264 build.

-Justin