diff --git a/picture/ffmpeg_group.png b/picture/ffmpeg_group.png
index d700c04..929cfc2 100644
Binary files a/picture/ffmpeg_group.png and b/picture/ffmpeg_group.png differ
diff --git a/shell/ffmpeg/build_ffmpeg_mp3.sh b/shell/ffmpeg/build_ffmpeg_mp3.sh
index 9128397..41ba7f6 100644
--- a/shell/ffmpeg/build_ffmpeg_mp3.sh
+++ b/shell/ffmpeg/build_ffmpeg_mp3.sh
@@ -28,7 +28,7 @@ NATIVE_CPU='armv8-a'
 OPTIMIZE_CFLAGS=""
 fi
 
-export NDK=/Users/frank/Library/Android/android-ndk-r10e
+export NDK=/Users/frank/Library/Android/android-ndk-r15c
 export PREBUILT=$NDK/toolchains/$CPU-linux-$ANDROID-4.9/prebuilt
 export PLATFORM=$NDK/platforms/android-21/arch-$ARCH
 export TOOLCHAIN=$PREBUILT/darwin-x86_64
diff --git a/shell/ffmpeg/build_ffmpeg_x264.sh b/shell/ffmpeg/build_ffmpeg_x264.sh
index f5d5f67..2b928c3 100644
--- a/shell/ffmpeg/build_ffmpeg_x264.sh
+++ b/shell/ffmpeg/build_ffmpeg_x264.sh
@@ -28,7 +28,7 @@ NATIVE_CPU='armv8-a'
 OPTIMIZE_CFLAGS=""
 fi
 
-export NDK=/Users/frank/Library/Android/android-ndk-r10e
+export NDK=/Users/frank/Library/Android/android-ndk-r15c
 export PREBUILT=$NDK/toolchains/$CPU-linux-$ANDROID-4.9/prebuilt
 export PLATFORM=$NDK/platforms/android-21/arch-$ARCH
 export TOOLCHAIN=$PREBUILT/darwin-x86_64