diff --git a/library/src/main/jniLibs/armeabi-v7a/libenc.so b/library/src/main/jniLibs/armeabi-v7a/libenc.so
index 7847901..ce82e11 100755
Binary files a/library/src/main/jniLibs/armeabi-v7a/libenc.so and b/library/src/main/jniLibs/armeabi-v7a/libenc.so differ
diff --git a/library/src/main/jniLibs/armeabi-v7a/libyuv.so b/library/src/main/jniLibs/armeabi-v7a/libyuv.so
index 571ccac..e2301c6 100644
Binary files a/library/src/main/jniLibs/armeabi-v7a/libyuv.so and b/library/src/main/jniLibs/armeabi-v7a/libyuv.so differ
diff --git a/library/src/main/jniLibs/x86/libenc.so b/library/src/main/jniLibs/x86/libenc.so
index fc4e7cd..0b203f3 100755
Binary files a/library/src/main/jniLibs/x86/libenc.so and b/library/src/main/jniLibs/x86/libenc.so differ
diff --git a/library/src/main/libenc/jni/libenc.cc b/library/src/main/libenc/jni/libenc.cc
index 4315e58..854a49b 100644
--- a/library/src/main/libenc/jni/libenc.cc
+++ b/library/src/main/libenc/jni/libenc.cc
@@ -151,51 +151,6 @@ static void libenc_setEncoderResolution(JNIEnv* env, jobject thiz, jint out_widt
     x264_ctx.height = out_height;
 }
 
-// For COLOR_FormatYUV420Planar
-static jbyteArray libenc_NV21ToI420(JNIEnv* env, jobject thiz, jbyteArray frame, jint src_width,
-                                    jint src_height, jboolean need_flip, jint rotate_degree) {
-    jbyte* nv21_frame = env->GetByteArrayElements(frame, NULL);
-
-    if (!convert_to_i420(nv21_frame, src_width, src_height, need_flip, rotate_degree, FOURCC_NV21)) {
-        return NULL;
-    }
-
-    int y_size = i420_scaled_frame.width * i420_scaled_frame.height;
-    jbyteArray i420Frame = env->NewByteArray(y_size * 3 / 2);
-    env->SetByteArrayRegion(i420Frame, 0, y_size * 3 / 2, (jbyte *) i420_scaled_frame.data);
-
-    env->ReleaseByteArrayElements(frame, nv21_frame, JNI_ABORT);
-    return i420Frame;
-}
-
-// For COLOR_FormatYUV420SemiPlanar
-static jbyteArray libenc_NV21ToNV12(JNIEnv* env, jobject thiz, jbyteArray frame, jint src_width,
-                                    jint src_height, jboolean need_flip, jint rotate_degree) {
-    jbyte* nv21_frame = env->GetByteArrayElements(frame, NULL);
-
-    if (!convert_to_i420(nv21_frame, src_width, src_height, need_flip, rotate_degree, FOURCC_NV21)) {
-        return NULL;
-    }
-
-    int ret = ConvertFromI420(i420_scaled_frame.y, i420_scaled_frame.width,
-                              i420_scaled_frame.u, i420_scaled_frame.width / 2,
-                              i420_scaled_frame.v, i420_scaled_frame.width / 2,
-                              nv12_frame.data, nv12_frame.width,
-                              nv12_frame.width, nv12_frame.height,
-                              FOURCC_NV12);
-    if (ret < 0) {
-        LIBENC_LOGE("ConvertFromI420 failure");
-        return NULL;
-    }
-
-    int y_size = nv12_frame.width * nv12_frame.height;
-    jbyteArray nv12Frame = env->NewByteArray(y_size * 3 / 2);
-    env->SetByteArrayRegion(nv12Frame, 0, y_size * 3 / 2, (jbyte *) nv12_frame.data);
-
-    env->ReleaseByteArrayElements(frame, nv21_frame, JNI_ABORT);
-    return nv12Frame;
-}
-
 // For COLOR_FormatYUV420Planar
 static jbyteArray libenc_RGBAToI420(JNIEnv* env, jobject thiz, jbyteArray frame, jint src_width,
                                     jint src_height, jboolean need_flip, jint rotate_degree) {
@@ -291,31 +246,6 @@ static int x264_encode(struct YuvFrame *i420_frame, int64_t pts) {
     return encode_nals(nal, nnal);
 }
 
-static jint libenc_NV21SoftEncode(JNIEnv* env, jobject thiz, jbyteArray frame, jint src_width,
-                                  jint src_height, jboolean need_flip, jint rotate_degree, jlong pts) {
-    jbyte* nv21_frame = env->GetByteArrayElements(frame, NULL);
-
-    if (!convert_to_i420(nv21_frame, src_width, src_height, need_flip, rotate_degree, FOURCC_NV21)) {
-        return JNI_ERR;
-    }
-
-    int es_len = x264_ctx.global_nal_header ? encode_global_nal_header() : x264_encode(&i420_scaled_frame, pts);
-    if (es_len <= 0) {
-        LIBENC_LOGE("Fail to encode nalu");
-        return JNI_ERR;
-    }
-
-    jbyteArray outputFrame = env->NewByteArray(es_len);
-    env->SetByteArrayRegion(outputFrame, 0, es_len, (jbyte *) h264_es);
-
-    jclass clz = env->GetObjectClass(thiz);
-    jmethodID mid = env->GetMethodID(clz, "onSoftEncodedData", "([BJZ)V");
-    env->CallVoidMethod(thiz, mid, outputFrame, x264_ctx.pts, x264_ctx.is_key_frame);
-
-    env->ReleaseByteArrayElements(frame, nv21_frame, JNI_ABORT);
-    return JNI_OK;
-}
-
 static jint libenc_RGBASoftEncode(JNIEnv* env, jobject thiz, jbyteArray frame, jint src_width,
                                   jint src_height, jboolean need_flip, jint rotate_degree, jlong pts) {
     jbyte* rgba_frame = env->GetByteArrayElements(frame, NULL);
@@ -397,13 +327,10 @@ static JNINativeMethod libenc_methods[] = {
     { "setEncoderGop", "(I)V", (void *)libenc_setEncoderGop },
     { "setEncoderBitrate", "(I)V", (void *)libenc_setEncoderBitrate },
     { "setEncoderPreset", "(Ljava/lang/String;)V", (void *)libenc_setEncoderPreset },
-    { "NV21ToI420", "([BIIZI)[B", (void *)libenc_NV21ToI420 },
-    { "NV21ToNV12", "([BIIZI)[B", (void *)libenc_NV21ToNV12 },
     { "RGBAToI420", "([BIIZI)[B", (void *)libenc_RGBAToI420 },
     { "RGBAToNV12", "([BIIZI)[B", (void *)libenc_RGBAToNV12 },
     { "openSoftEncoder", "()Z", (void *)libenc_openSoftEncoder },
     { "closeSoftEncoder", "()V", (void *)libenc_closeSoftEncoder },
-    { "NV21SoftEncode", "([BIIZIJ)I", (void *)libenc_NV21SoftEncode },
     { "RGBASoftEncode", "([BIIZIJ)I", (void *)libenc_RGBASoftEncode },
 };