change x264 from 10bit to 8bit

@@ -17,6 +17,9 @@ mkdir -p ${ff_release_dir}
 ff_yasm_bin=${ff_release_dir}/bin/yasm
 if [[ -f ${ff_yasm_bin} ]]; then 
     echo "yasm is ok"
+    # add yasm to path, for x264 to use yasm directly.
+    # ffmpeg can specifies the yasm path when configure it.
+    PATH=${PATH}:${ff_release_dir}/bin
 else
     echo "build yasm-1.2.0"
     cd $ff_current_dir &&
@@ -56,7 +59,7 @@ else
     echo "build x264"
     cd $ff_current_dir &&
     rm -rf x264-snapshot-20131129-2245-stable && unzip -q ${ff_src_dir}/x264-snapshot-20131129-2245-stable.zip &&
-    cd x264-snapshot-20131129-2245-stable && ./configure --prefix=${ff_release_dir} --bit-depth=10 --enable-static && make && make install
+    cd x264-snapshot-20131129-2245-stable && ./configure --prefix=${ff_release_dir} --bit-depth=8 --enable-static && make && make install
     ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build x264 failed"; exit 1; fi
 fi