diff --git a/multimedia/av_codec/native_avcodec_audiodecoder.h b/multimedia/av_codec/native_avcodec_audiodecoder.h
index e834aa233de12015f84951bee3363bebd4487aff..bdadfd54de93b84bd9b169cc51be5b10e367df1e 100644
--- a/multimedia/av_codec/native_avcodec_audiodecoder.h
+++ b/multimedia/av_codec/native_avcodec_audiodecoder.h
@@ -244,7 +244,6 @@ OH_AVErrCode OH_AudioDecoder_FreeOutputData(OH_AVCodec *codec, uint32_t index);
  * @since 10
  */
 OH_AVErrCode OH_AudioDecoder_IsValid(OH_AVCodec *codec, bool *isValid);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/multimedia/media_foundation/native_avbuffer.h b/multimedia/media_foundation/native_avbuffer.h
index 391fc0691d437512b9070ce35141b5f334a39c6c..59600f0587b9008c6a47684f896e894b6c8506ed 100644
--- a/multimedia/media_foundation/native_avbuffer.h
+++ b/multimedia/media_foundation/native_avbuffer.h
@@ -33,7 +33,7 @@ typedef struct OH_NativeBuffer OH_NativeBuffer;
  * to by the return value * needs to be manually released by {@link OH_AVBuffer_Destroy}.
  * @syscap SystemCapability.Multimedia.Media.Core
  * @param capacity the buffer's capacity, bytes
- * @return Returns a pointer to an OH_AVBuffer instance if the execution is successful, otherwise returns nullptr
+ * @return Returns a pointer to an OH_AVBuffer instance if the execution is successful, otherwise returns nullptr.
  * Possible failure causes: 1. capacity <= 0. 2. create allocator failed. 3. create OH_AVBuffer failed.
  * 4. created buffer memory is nullptr. 5. created buffer memory's addr is nullptr. 6. failed to new OH_AVBuffer.
  * @since 11
diff --git a/multimedia/media_foundation/native_avformat.h b/multimedia/media_foundation/native_avformat.h
index 6868ce4de4147a229cee1e6f835cc7fae18c294e..12aa1a1d459c580fe3a381e9b029958f9340a787 100644
--- a/multimedia/media_foundation/native_avformat.h
+++ b/multimedia/media_foundation/native_avformat.h
@@ -110,7 +110,7 @@ void OH_AVFormat_Destroy(struct OH_AVFormat *format);
  * @param to OH_AVFormat handle pointer to receive data
  * @param from pointer to the OH_AVFormat handle of the copied data
  * @return The return value is TRUE for success, FALSE for failure
-  * Possible failure causes: 1. input format is nullptr. 2. input format's magic error.
+ * Possible failure causes: 1. input format is nullptr. 2. input format's magic error.
  * @since 9
  * @version 1.0
  */