[FFmpeg-user] FFmpeg fails to build after upgrading libx264 to version 125

[Rodney Baker]

Hi all. Last week I updated x264 to the latest git version (libx264.so.125 is 
the new version). Ever since then FFmpeg has failed to build, erroring out as 
follows:

[...]
LD      ffplay_g
LD      ffmpeg_g
LD      ffprobe_g
libavcodec/libavcodec.a(libx264.o): In function `X264_init':
/usr/local/src/ffmpeg/libavcodec/libx264.c:492: undefined reference to 
`x264_encoder_open_124'
collect2: ld returned 1 exit status
make: *** [ffplay_g] Error 1
make: *** Waiting for unfinished jobs....
libavcodec/libavcodec.a(libx264.o): In function `X264_init':
/usr/local/src/ffmpeg/libavcodec/libx264.c:492: undefined reference to 
`x264_encoder_open_124'
collect2: ld returned 1 exit status
make: *** [ffmpeg_g] Error 1
libavcodec/libavcodec.a(libx264.o): In function `X264_init':
/usr/local/src/ffmpeg/libavcodec/libx264.c:492: undefined reference to 
`x264_encoder_open_124'
collect2: ld returned 1 exit status
make: *** [ffprobe_g] Error 1
make error - please check your work


I tried checking the sources but I can't find where it is getting this 
reference to 'x264_encoder_open_124'. Should that not be referring to 
x264_encoder_open_125 now that libx264 is updated? 

x264 was updated via git pull, built from source (with --enable-shared --
prefix=/usr) and installed with 'sudo make install' prior to updating FFmpeg 
(again from git). 

Any hints? I'd submit a patch (if needed) if I knew where to look and what to 
fix.

The relevant line says;

 x4->enc = x264_encoder_open(&x4->params);

...but the &x4->params is french to me - where does that get its reference to 
the appropriate libx264 version that it should be looking for? Searching for 
'124' in libx264.c hasn't helped.

Thanks.

-- 
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Rodney Baker VK5ZTV
rodney.baker at iinet.net.au
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