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

[Roger Pack]

> 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'

did you reconfigure ffmpeg?
make clean
make distclean?
-r