ffpeg x264 multi-core doesn't work use doubango

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What steps will reproduce the problem?
1.I recompile the x264 use more cpu follow this:
https://groups.google.com/forum/#!topic/android-ndk/_OHzzpyw29U
for android use corss-compile. After tested ./x264 on my android device,it
works well (multicore works), the encode fps can get to 50, while use only one
core,the fps is only about 25 ;
2.But when I replace libx264.lib in thirdparties/android/armv7-a/libx264.a with
the one I compiled, I find there isn't any help except the 4 core(my android
phone has 4 cores)are all in use, the video encode time
(tinyDAV/src/codes/tdav_codec_h264.c ,function tdav_codec_h264_encode)
avcodec_encode_video used isn't reduce any.That is to say the multi-core isn't
work with doubango?
3.So anyone can help me, why multicore didn't work with doubango?

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?

Please provide any additional information below.

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Original issue reported on code.google.com by `gle2135...@gmail.com` on 23 Oct 2014 at 1:13