diff --git a/api/video_codecs/video_encoder.h b/api/video_codecs/video_encoder.h
index da21fa65a2..cce2dbda53 100644
--- a/api/video_codecs/video_encoder.h
+++ b/api/video_codecs/video_encoder.h
@@ -178,7 +178,6 @@ class RTC_EXPORT VideoEncoder {
   //                                 <0 - Errors:
   //                                  WEBRTC_VIDEO_CODEC_ERR_PARAMETER
   //                                  WEBRTC_VIDEO_CODEC_ERR_SIZE
-  //                                  WEBRTC_VIDEO_CODEC_LEVEL_EXCEEDED
   //                                  WEBRTC_VIDEO_CODEC_MEMORY
   //                                  WEBRTC_VIDEO_CODEC_ERROR
   virtual int32_t InitEncode(const VideoCodec* codec_settings,
@@ -210,7 +209,6 @@ class RTC_EXPORT VideoEncoder {
   //                                  WEBRTC_VIDEO_CODEC_ERR_PARAMETER
   //                                  WEBRTC_VIDEO_CODEC_MEMORY
   //                                  WEBRTC_VIDEO_CODEC_ERROR
-  //                                  WEBRTC_VIDEO_CODEC_TIMEOUT
   virtual int32_t Encode(const VideoFrame& frame,
                          const CodecSpecificInfo* codec_specific_info,
                          const std::vector<FrameType>* frame_types) = 0;
diff --git a/modules/video_coding/generic_decoder.cc b/modules/video_coding/generic_decoder.cc
index 2dd9b2604b..5ee8d4eb70 100644
--- a/modules/video_coding/generic_decoder.cc
+++ b/modules/video_coding/generic_decoder.cc
@@ -238,8 +238,7 @@ int32_t VCMGenericDecoder::Decode(const VCMEncodedFrame& frame, int64_t nowMs) {
                         << frame.Timestamp() << ", error code: " << ret;
     _callback->Pop(frame.Timestamp());
     return ret;
-  } else if (ret == WEBRTC_VIDEO_CODEC_NO_OUTPUT ||
-             ret == WEBRTC_VIDEO_CODEC_REQUEST_SLI) {
+  } else if (ret == WEBRTC_VIDEO_CODEC_NO_OUTPUT) {
     // No output
     _callback->Pop(frame.Timestamp());
   }
diff --git a/modules/video_coding/include/video_coding_defines.h b/modules/video_coding/include/video_coding_defines.h
index 242edee824..dc9060c5c1 100644
--- a/modules/video_coding/include/video_coding_defines.h
+++ b/modules/video_coding/include/video_coding_defines.h
@@ -27,17 +27,12 @@ namespace webrtc {
 #define VCM_MISSING_CALLBACK 1
 #define VCM_OK 0
 #define VCM_GENERAL_ERROR -1
-#define VCM_LEVEL_EXCEEDED -2
-#define VCM_MEMORY -3
 #define VCM_PARAMETER_ERROR -4
-#define VCM_UNKNOWN_PAYLOAD -5
 #define VCM_CODEC_ERROR -6
 #define VCM_UNINITIALIZED -7
 #define VCM_NO_CODEC_REGISTERED -8
 #define VCM_JITTER_BUFFER_ERROR -9
 #define VCM_OLD_PACKET_ERROR -10
-#define VCM_NO_FRAME_DECODED -11
-#define VCM_NOT_IMPLEMENTED -20
 
 enum {
   // Timing frames settings. Timing frames are sent every
diff --git a/modules/video_coding/include/video_error_codes.h b/modules/video_coding/include/video_error_codes.h
index 4f0da22ff2..f57713d1a2 100644
--- a/modules/video_coding/include/video_error_codes.h
+++ b/modules/video_coding/include/video_error_codes.h
@@ -16,17 +16,13 @@
 // Define return values
 
 #define WEBRTC_VIDEO_CODEC_OK_REQUEST_KEYFRAME 4
-#define WEBRTC_VIDEO_CODEC_REQUEST_SLI 2
 #define WEBRTC_VIDEO_CODEC_NO_OUTPUT 1
 #define WEBRTC_VIDEO_CODEC_OK 0
 #define WEBRTC_VIDEO_CODEC_ERROR -1
-#define WEBRTC_VIDEO_CODEC_LEVEL_EXCEEDED -2
 #define WEBRTC_VIDEO_CODEC_MEMORY -3
 #define WEBRTC_VIDEO_CODEC_ERR_PARAMETER -4
 #define WEBRTC_VIDEO_CODEC_ERR_SIZE -5
-#define WEBRTC_VIDEO_CODEC_TIMEOUT -6
 #define WEBRTC_VIDEO_CODEC_UNINITIALIZED -7
-#define WEBRTC_VIDEO_CODEC_ERR_REQUEST_SLI -12
 #define WEBRTC_VIDEO_CODEC_FALLBACK_SOFTWARE -13
 #define WEBRTC_VIDEO_CODEC_TARGET_BITRATE_OVERSHOOT -14
 #define WEBRTC_VIDEO_CODEC_ERR_SIMULCAST_PARAMETERS_NOT_SUPPORTED -15