diff --git a/avcodec/codecs.go b/avcodec/codecs.go
index 43e84f3..6c899b1 100644
--- a/avcodec/codecs.go
+++ b/avcodec/codecs.go
@@ -13,7 +13,6 @@ import "C"
 
 const (
 	AV_CODEC_ID_012V                        = int(C.AV_CODEC_ID_012V)
-	AV_CODEC_ID_4GV                         = int(C.AV_CODEC_ID_4GV)
 	AV_CODEC_ID_4XM                         = int(C.AV_CODEC_ID_4XM)
 	AV_CODEC_ID_8BPS                        = int(C.AV_CODEC_ID_8BPS)
 	AV_CODEC_ID_8SVX_EXP                    = int(C.AV_CODEC_ID_8SVX_EXP)
@@ -57,7 +56,6 @@ const (
 	AV_CODEC_ID_ADPCM_SBPRO_4               = int(C.AV_CODEC_ID_ADPCM_SBPRO_4)
 	AV_CODEC_ID_ADPCM_SWF                   = int(C.AV_CODEC_ID_ADPCM_SWF)
 	AV_CODEC_ID_ADPCM_THP                   = int(C.AV_CODEC_ID_ADPCM_THP)
-	AV_CODEC_ID_ADPCM_THP_LE                = int(C.AV_CODEC_ID_ADPCM_THP_LE)
 	AV_CODEC_ID_ADPCM_VIMA                  = int(C.AV_CODEC_ID_ADPCM_VIMA)
 	AV_CODEC_ID_ADPCM_VIMA_DEPRECATED       = int(C.AV_CODEC_ID_ADPCM_VIMA_DEPRECATED)
 	AV_CODEC_ID_ADPCM_XA                    = int(C.AV_CODEC_ID_ADPCM_XA)
@@ -71,7 +69,6 @@ const (
 	AV_CODEC_ID_ANM                         = int(C.AV_CODEC_ID_ANM)
 	AV_CODEC_ID_ANSI                        = int(C.AV_CODEC_ID_ANSI)
 	AV_CODEC_ID_APE                         = int(C.AV_CODEC_ID_APE)
-	AV_CODEC_ID_APNG                        = int(C.AV_CODEC_ID_APNG)
 	AV_CODEC_ID_ASS                         = int(C.AV_CODEC_ID_ASS)
 	AV_CODEC_ID_ASV1                        = int(C.AV_CODEC_ID_ASV1)
 	AV_CODEC_ID_ASV2                        = int(C.AV_CODEC_ID_ASV2)
@@ -111,7 +108,6 @@ const (
 	AV_CODEC_ID_CPIA                        = int(C.AV_CODEC_ID_CPIA)
 	AV_CODEC_ID_CSCD                        = int(C.AV_CODEC_ID_CSCD)
 	AV_CODEC_ID_CYUV                        = int(C.AV_CODEC_ID_CYUV)
-	AV_CODEC_ID_DDS                         = int(C.AV_CODEC_ID_DDS)
 	AV_CODEC_ID_DFA                         = int(C.AV_CODEC_ID_DFA)
 	AV_CODEC_ID_DIRAC                       = int(C.AV_CODEC_ID_DIRAC)
 	AV_CODEC_ID_DNXHD                       = int(C.AV_CODEC_ID_DNXHD)
@@ -122,7 +118,6 @@ const (
 	AV_CODEC_ID_DSD_MSBF_PLANAR             = int(C.AV_CODEC_ID_DSD_MSBF_PLANAR)
 	AV_CODEC_ID_DSICINAUDIO                 = int(C.AV_CODEC_ID_DSICINAUDIO)
 	AV_CODEC_ID_DSICINVIDEO                 = int(C.AV_CODEC_ID_DSICINVIDEO)
-	AV_CODEC_ID_DSS_SP                      = int(C.AV_CODEC_ID_DSS_SP)
 	AV_CODEC_ID_DTS                         = int(C.AV_CODEC_ID_DTS)
 	AV_CODEC_ID_DVAUDIO                     = int(C.AV_CODEC_ID_DVAUDIO)
 	AV_CODEC_ID_DVB_SUBTITLE                = int(C.AV_CODEC_ID_DVB_SUBTITLE)
@@ -167,13 +162,10 @@ const (
 	AV_CODEC_ID_H263I                       = int(C.AV_CODEC_ID_H263I)
 	AV_CODEC_ID_H263P                       = int(C.AV_CODEC_ID_H263P)
 	AV_CODEC_ID_H264                        = int(C.AV_CODEC_ID_H264)
-	AV_CODEC_ID_HAP                         = int(C.AV_CODEC_ID_HAP)
 	AV_CODEC_ID_HDMV_PGS_SUBTITLE           = int(C.AV_CODEC_ID_HDMV_PGS_SUBTITLE)
 	AV_CODEC_ID_HEVC                        = int(C.AV_CODEC_ID_HEVC)
 	AV_CODEC_ID_HEVC_DEPRECATED             = int(C.AV_CODEC_ID_HEVC_DEPRECATED)
 	AV_CODEC_ID_HNM4_VIDEO                  = int(C.AV_CODEC_ID_HNM4_VIDEO)
-	AV_CODEC_ID_HQX                         = int(C.AV_CODEC_ID_HQX)
-	AV_CODEC_ID_HQ_HQA                      = int(C.AV_CODEC_ID_HQ_HQA)
 	AV_CODEC_ID_HUFFYUV                     = int(C.AV_CODEC_ID_HUFFYUV)
 	AV_CODEC_ID_IAC                         = int(C.AV_CODEC_ID_IAC)
 	AV_CODEC_ID_IDCIN                       = int(C.AV_CODEC_ID_IDCIN)
@@ -264,7 +256,6 @@ const (
 	AV_CODEC_ID_PCM_MULAW                   = int(C.AV_CODEC_ID_PCM_MULAW)
 	AV_CODEC_ID_PCM_S16BE                   = int(C.AV_CODEC_ID_PCM_S16BE)
 	AV_CODEC_ID_PCM_S16BE_PLANAR            = int(C.AV_CODEC_ID_PCM_S16BE_PLANAR)
-	AV_CODEC_ID_PCM_S16BE_PLANAR_DEPRECATED = int(C.AV_CODEC_ID_PCM_S16BE_PLANAR_DEPRECATED)
 	AV_CODEC_ID_PCM_S16LE                   = int(C.AV_CODEC_ID_PCM_S16LE)
 	AV_CODEC_ID_PCM_S16LE_PLANAR            = int(C.AV_CODEC_ID_PCM_S16LE_PLANAR)
 	AV_CODEC_ID_PCM_S24BE                   = int(C.AV_CODEC_ID_PCM_S24BE)
@@ -340,7 +331,6 @@ const (
 	AV_CODEC_ID_SPEEX                       = int(C.AV_CODEC_ID_SPEEX)
 	AV_CODEC_ID_SRT                         = int(C.AV_CODEC_ID_SRT)
 	AV_CODEC_ID_SSA                         = int(C.AV_CODEC_ID_SSA)
-	AV_CODEC_ID_STL                         = int(C.AV_CODEC_ID_STL)
 	AV_CODEC_ID_SUBRIP                      = int(C.AV_CODEC_ID_SUBRIP)
 	AV_CODEC_ID_SUBVIEWER                   = int(C.AV_CODEC_ID_SUBVIEWER)
 	AV_CODEC_ID_SUBVIEWER1                  = int(C.AV_CODEC_ID_SUBVIEWER1)
@@ -351,7 +341,6 @@ const (
 	AV_CODEC_ID_TAK_DEPRECATED              = int(C.AV_CODEC_ID_TAK_DEPRECATED)
 	AV_CODEC_ID_TARGA                       = int(C.AV_CODEC_ID_TARGA)
 	AV_CODEC_ID_TARGA_Y216                  = int(C.AV_CODEC_ID_TARGA_Y216)
-	AV_CODEC_ID_TDSC                        = int(C.AV_CODEC_ID_TDSC)
 	AV_CODEC_ID_TEXT                        = int(C.AV_CODEC_ID_TEXT)
 	AV_CODEC_ID_TGQ                         = int(C.AV_CODEC_ID_TGQ)
 	AV_CODEC_ID_TGV                         = int(C.AV_CODEC_ID_TGV)
@@ -432,3 +421,16 @@ const (
 	AV_CODEC_ID_ZLIB                        = int(C.AV_CODEC_ID_ZLIB)
 	AV_CODEC_ID_ZMBV                        = int(C.AV_CODEC_ID_ZMBV)
 )
+
+// const (
+// 	AV_CODEC_ID_4GV          = int(C.AV_CODEC_ID_4GV)
+// 	AV_CODEC_ID_ADPCM_THP_LE = int(C.AV_CODEC_ID_ADPCM_THP_LE)
+// 	AV_CODEC_ID_APNG         = int(C.AV_CODEC_ID_APNG)
+// 	AV_CODEC_ID_DDS          = int(C.AV_CODEC_ID_DDS)
+// 	AV_CODEC_ID_DSS_SP       = int(C.AV_CODEC_ID_DSS_SP)
+// 	AV_CODEC_ID_HAP          = int(C.AV_CODEC_ID_HAP)
+// 	AV_CODEC_ID_HQX          = int(C.AV_CODEC_ID_HQX)
+// 	AV_CODEC_ID_HQ_HQA       = int(C.AV_CODEC_ID_HQ_HQA)
+// 	AV_CODEC_ID_STL          = int(C.AV_CODEC_ID_STL)
+// 	AV_CODEC_ID_TDSC         = int(C.AV_CODEC_ID_TDSC)
+// )