diff --git a/app/src/main/java/com/frank/ffmpeg/activity/PushActivity.kt b/app/src/main/java/com/frank/ffmpeg/activity/PushActivity.kt
index d24bf46..a2785b8 100644
--- a/app/src/main/java/com/frank/ffmpeg/activity/PushActivity.kt
+++ b/app/src/main/java/com/frank/ffmpeg/activity/PushActivity.kt
@@ -12,7 +12,8 @@ import com.frank.ffmpeg.R
 import java.io.File
 
 /**
- * Using FFmpeg to push http-flv stream
+ * Using FFmpeg to push rtmp stream,
+ * with SRS media server convert to http-flv stream
  * Created by frank on 2018/2/2.
  */
 class PushActivity : BaseActivity() {
diff --git a/doc/FFmpeg_compile_shell.md b/doc/FFmpeg_compile_shell.md
index bdd07f9..5f5dfc0 100644
--- a/doc/FFmpeg_compile_shell.md
+++ b/doc/FFmpeg_compile_shell.md
@@ -274,7 +274,6 @@ function build_android {
     --disable-debug \
     --disable-doc \
     --enable-avfilter \
-    --enable-avresample \
     --enable-decoders \
     $ADDITIONAL_CONFIGURE_FLAG
 
diff --git a/picture/ffmpeg_group.png b/picture/ffmpeg_group.png
index b85143e..970b8bc 100644
Binary files a/picture/ffmpeg_group.png and b/picture/ffmpeg_group.png differ