[FFmpeg-user] How to integrate shared object file of libx264 while using ffmpeg for android?

Moritz Barsnick barsnick at gmx.net
Tue Aug 5 16:15:18 CEST 2014

On Tue, Aug 05, 2014 at 13:07:36 +0000, Carl Eugen Hoyos wrote:
> Do I understand correctly that you built a binary of x264 
> that has an incorrect so name? Is it perhaps sufficient to 
> rename the library?

If the Android toolchain behaves like a normal Linux/Unix toolchain,
the (ffmpeg) linking process picks up the soname from the SONAME field
_within_ the dynamic library, not from the filename. (Perhaps from the
filename if said field does not exist.)

In the linking stage of the x264 _library_, you can give the linker a
flag to determine the soname:


So you may need to build your libx264.so.142, remove this file, run
"make -n" to identify the final linking command line, and modify this
command line with the corresponding ld flag.

Check with:
$ objdump -p libx264.so | grep SONAME

You may be able to do binary patching to change this name. The tool
patchelf is capable ob binary ELF patching, but unfortunately doesn't
handle this field.


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