diff --git a/chromium/config/Chrome/linux/x64/config.h b/chromium/config/Chrome/linux/x64/config.h
index a98fdf201a..421b1cff30 100644
--- a/chromium/config/Chrome/linux/x64/config.h
+++ b/chromium/config/Chrome/linux/x64/config.h
@@ -674,7 +674,7 @@
 #define CONFIG_MUXERS 0
 #define CONFIG_PROTOCOLS 0
 #define CONFIG_AANDCTTABLES 0
-#define CONFIG_AC3DSP 0
+#define CONFIG_AC3DSP 1
 #define CONFIG_ADTS_HEADER 1
 #define CONFIG_ATSC_A53 1
 #define CONFIG_AUDIO_FRAME_QUEUE 0
diff --git a/chromium/config/Chrome/linux/x64/config_components.h b/chromium/config/Chrome/linux/x64/config_components.h
index 66c41749ef..cc3ded1a8b 100644
--- a/chromium/config/Chrome/linux/x64/config_components.h
+++ b/chromium/config/Chrome/linux/x64/config_components.h
@@ -10,7 +10,7 @@
 #define CONFIG_DCA_CORE_BSF 0
 #define CONFIG_DTS2PTS_BSF 0
 #define CONFIG_DV_ERROR_MARKER_BSF 0
-#define CONFIG_EAC3_CORE_BSF 0
+#define CONFIG_EAC3_CORE_BSF 1
 #define CONFIG_EVC_FRAME_MERGE_BSF 0
 #define CONFIG_EXTRACT_EXTRADATA_BSF 0
 #define CONFIG_FILTER_UNITS_BSF 0
@@ -338,8 +338,8 @@
 #define CONFIG_AAC_DECODER 1
 #define CONFIG_AAC_FIXED_DECODER 0
 #define CONFIG_AAC_LATM_DECODER 0
-#define CONFIG_AC3_DECODER 0
-#define CONFIG_AC3_FIXED_DECODER 0
+#define CONFIG_AC3_DECODER 1
+#define CONFIG_AC3_FIXED_DECODER 1
 #define CONFIG_ACELP_KELVIN_DECODER 0
 #define CONFIG_ALAC_DECODER 0
 #define CONFIG_ALS_DECODER 0
@@ -370,7 +370,7 @@
 #define CONFIG_DSICINAUDIO_DECODER 0
 #define CONFIG_DSS_SP_DECODER 0
 #define CONFIG_DST_DECODER 0
-#define CONFIG_EAC3_DECODER 0
+#define CONFIG_EAC3_DECODER 1
 #define CONFIG_EVRC_DECODER 0
 #define CONFIG_FASTAUDIO_DECODER 0
 #define CONFIG_FFWAVESYNTH_DECODER 0
@@ -559,11 +559,11 @@
 #define CONFIG_WEBVTT_DECODER 0
 #define CONFIG_XSUB_DECODER 0
 #define CONFIG_AAC_AT_DECODER 0
-#define CONFIG_AC3_AT_DECODER 0
+#define CONFIG_AC3_AT_DECODER 1
 #define CONFIG_ADPCM_IMA_QT_AT_DECODER 0
 #define CONFIG_ALAC_AT_DECODER 0
 #define CONFIG_AMR_NB_AT_DECODER 0
-#define CONFIG_EAC3_AT_DECODER 0
+#define CONFIG_EAC3_AT_DECODER 1
 #define CONFIG_GSM_MS_AT_DECODER 0
 #define CONFIG_ILBC_AT_DECODER 0
 #define CONFIG_MP1_AT_DECODER 0
@@ -953,7 +953,7 @@
 #define CONFIG_WMV3_VDPAU_HWACCEL 0
 #define CONFIG_AAC_PARSER 1
 #define CONFIG_AAC_LATM_PARSER 0
-#define CONFIG_AC3_PARSER 0
+#define CONFIG_AC3_PARSER 1
 #define CONFIG_ADX_PARSER 0
 #define CONFIG_AMR_PARSER 0
 #define CONFIG_AV1_PARSER 0
@@ -1621,7 +1621,7 @@
 #define CONFIG_AA_DEMUXER 0
 #define CONFIG_AAC_DEMUXER 1
 #define CONFIG_AAX_DEMUXER 0
-#define CONFIG_AC3_DEMUXER 0
+#define CONFIG_AC3_DEMUXER 1
 #define CONFIG_AC4_DEMUXER 0
 #define CONFIG_ACE_DEMUXER 0
 #define CONFIG_ACM_DEMUXER 0
@@ -1705,7 +1705,7 @@
 #define CONFIG_DXA_DEMUXER 0
 #define CONFIG_EA_DEMUXER 0
 #define CONFIG_EA_CDATA_DEMUXER 0
-#define CONFIG_EAC3_DEMUXER 0
+#define CONFIG_EAC3_DEMUXER 1
 #define CONFIG_EPAF_DEMUXER 0
 #define CONFIG_EVC_DEMUXER 0
 #define CONFIG_FFMETADATA_DEMUXER 0
diff --git a/chromium/config/Chrome/linux/x64/libavcodec/codec_list.c b/chromium/config/Chrome/linux/x64/libavcodec/codec_list.c
index c9666ae199..75415127f1 100644
--- a/chromium/config/Chrome/linux/x64/libavcodec/codec_list.c
+++ b/chromium/config/Chrome/linux/x64/libavcodec/codec_list.c
@@ -15,4 +15,7 @@ static const FFCodec * const codec_list[] = {
     &ff_pcm_u8_decoder,
     &ff_libopus_decoder,
     &ff_hevc_decoder,
+    &ff_ac3_decoder,
+    &ff_eac3_decoder,
+    &ff_ac3_fixed_decoder,
     NULL };
diff --git a/chromium/config/Chrome/linux/x64/libavcodec/parser_list.c b/chromium/config/Chrome/linux/x64/libavcodec/parser_list.c
index c85087a596..a9e086ef6d 100644
--- a/chromium/config/Chrome/linux/x64/libavcodec/parser_list.c
+++ b/chromium/config/Chrome/linux/x64/libavcodec/parser_list.c
@@ -7,4 +7,5 @@ static const AVCodecParser * const parser_list[] = {
     &ff_vorbis_parser,
     &ff_vp9_parser,
     &ff_hevc_parser,
+    &ff_ac3_parser,
     NULL };
diff --git a/chromium/config/Chrome/linux/x64/libavformat/demuxer_list.c b/chromium/config/Chrome/linux/x64/libavformat/demuxer_list.c
index 29f1f59381..6fb0769ce7 100644
--- a/chromium/config/Chrome/linux/x64/libavformat/demuxer_list.c
+++ b/chromium/config/Chrome/linux/x64/libavformat/demuxer_list.c
@@ -6,4 +6,6 @@ static const FFInputFormat * const demuxer_list[] = {
     &ff_mp3_demuxer,
     &ff_ogg_demuxer,
     &ff_wav_demuxer,
+    &ff_ac3_demuxer,
+    &ff_eac3_demuxer,
     NULL };
diff --git a/chromium/config/Chrome/mac/x64/config.h b/chromium/config/Chrome/mac/x64/config.h
index 92151a92d2..69194a7959 100644
--- a/chromium/config/Chrome/mac/x64/config.h
+++ b/chromium/config/Chrome/mac/x64/config.h
@@ -674,7 +674,7 @@
 #define CONFIG_MUXERS 0
 #define CONFIG_PROTOCOLS 0
 #define CONFIG_AANDCTTABLES 0
-#define CONFIG_AC3DSP 0
+#define CONFIG_AC3DSP 1
 #define CONFIG_ADTS_HEADER 1
 #define CONFIG_ATSC_A53 1
 #define CONFIG_AUDIO_FRAME_QUEUE 0
diff --git a/chromium/config/Chrome/mac/x64/config_components.h b/chromium/config/Chrome/mac/x64/config_components.h
index 66c41749ef..cc3ded1a8b 100644
--- a/chromium/config/Chrome/mac/x64/config_components.h
+++ b/chromium/config/Chrome/mac/x64/config_components.h
@@ -10,7 +10,7 @@
 #define CONFIG_DCA_CORE_BSF 0
 #define CONFIG_DTS2PTS_BSF 0
 #define CONFIG_DV_ERROR_MARKER_BSF 0
-#define CONFIG_EAC3_CORE_BSF 0
+#define CONFIG_EAC3_CORE_BSF 1
 #define CONFIG_EVC_FRAME_MERGE_BSF 0
 #define CONFIG_EXTRACT_EXTRADATA_BSF 0
 #define CONFIG_FILTER_UNITS_BSF 0
@@ -338,8 +338,8 @@
 #define CONFIG_AAC_DECODER 1
 #define CONFIG_AAC_FIXED_DECODER 0
 #define CONFIG_AAC_LATM_DECODER 0
-#define CONFIG_AC3_DECODER 0
-#define CONFIG_AC3_FIXED_DECODER 0
+#define CONFIG_AC3_DECODER 1
+#define CONFIG_AC3_FIXED_DECODER 1
 #define CONFIG_ACELP_KELVIN_DECODER 0
 #define CONFIG_ALAC_DECODER 0
 #define CONFIG_ALS_DECODER 0
@@ -370,7 +370,7 @@
 #define CONFIG_DSICINAUDIO_DECODER 0
 #define CONFIG_DSS_SP_DECODER 0
 #define CONFIG_DST_DECODER 0
-#define CONFIG_EAC3_DECODER 0
+#define CONFIG_EAC3_DECODER 1
 #define CONFIG_EVRC_DECODER 0
 #define CONFIG_FASTAUDIO_DECODER 0
 #define CONFIG_FFWAVESYNTH_DECODER 0
@@ -559,11 +559,11 @@
 #define CONFIG_WEBVTT_DECODER 0
 #define CONFIG_XSUB_DECODER 0
 #define CONFIG_AAC_AT_DECODER 0
-#define CONFIG_AC3_AT_DECODER 0
+#define CONFIG_AC3_AT_DECODER 1
 #define CONFIG_ADPCM_IMA_QT_AT_DECODER 0
 #define CONFIG_ALAC_AT_DECODER 0
 #define CONFIG_AMR_NB_AT_DECODER 0
-#define CONFIG_EAC3_AT_DECODER 0
+#define CONFIG_EAC3_AT_DECODER 1
 #define CONFIG_GSM_MS_AT_DECODER 0
 #define CONFIG_ILBC_AT_DECODER 0
 #define CONFIG_MP1_AT_DECODER 0
@@ -953,7 +953,7 @@
 #define CONFIG_WMV3_VDPAU_HWACCEL 0
 #define CONFIG_AAC_PARSER 1
 #define CONFIG_AAC_LATM_PARSER 0
-#define CONFIG_AC3_PARSER 0
+#define CONFIG_AC3_PARSER 1
 #define CONFIG_ADX_PARSER 0
 #define CONFIG_AMR_PARSER 0
 #define CONFIG_AV1_PARSER 0
@@ -1621,7 +1621,7 @@
 #define CONFIG_AA_DEMUXER 0
 #define CONFIG_AAC_DEMUXER 1
 #define CONFIG_AAX_DEMUXER 0
-#define CONFIG_AC3_DEMUXER 0
+#define CONFIG_AC3_DEMUXER 1
 #define CONFIG_AC4_DEMUXER 0
 #define CONFIG_ACE_DEMUXER 0
 #define CONFIG_ACM_DEMUXER 0
@@ -1705,7 +1705,7 @@
 #define CONFIG_DXA_DEMUXER 0
 #define CONFIG_EA_DEMUXER 0
 #define CONFIG_EA_CDATA_DEMUXER 0
-#define CONFIG_EAC3_DEMUXER 0
+#define CONFIG_EAC3_DEMUXER 1
 #define CONFIG_EPAF_DEMUXER 0
 #define CONFIG_EVC_DEMUXER 0
 #define CONFIG_FFMETADATA_DEMUXER 0
diff --git a/chromium/config/Chrome/mac/x64/libavcodec/codec_list.c b/chromium/config/Chrome/mac/x64/libavcodec/codec_list.c
index c9666ae199..75415127f1 100644
--- a/chromium/config/Chrome/mac/x64/libavcodec/codec_list.c
+++ b/chromium/config/Chrome/mac/x64/libavcodec/codec_list.c
@@ -15,4 +15,7 @@ static const FFCodec * const codec_list[] = {
     &ff_pcm_u8_decoder,
     &ff_libopus_decoder,
     &ff_hevc_decoder,
+    &ff_ac3_decoder,
+    &ff_eac3_decoder,
+    &ff_ac3_fixed_decoder,
     NULL };
diff --git a/chromium/config/Chrome/mac/x64/libavcodec/parser_list.c b/chromium/config/Chrome/mac/x64/libavcodec/parser_list.c
index c85087a596..a9e086ef6d 100644
--- a/chromium/config/Chrome/mac/x64/libavcodec/parser_list.c
+++ b/chromium/config/Chrome/mac/x64/libavcodec/parser_list.c
@@ -7,4 +7,5 @@ static const AVCodecParser * const parser_list[] = {
     &ff_vorbis_parser,
     &ff_vp9_parser,
     &ff_hevc_parser,
+    &ff_ac3_parser,
     NULL };
diff --git a/chromium/config/Chrome/mac/x64/libavformat/demuxer_list.c b/chromium/config/Chrome/mac/x64/libavformat/demuxer_list.c
index 29f1f59381..6fb0769ce7 100644
--- a/chromium/config/Chrome/mac/x64/libavformat/demuxer_list.c
+++ b/chromium/config/Chrome/mac/x64/libavformat/demuxer_list.c
@@ -6,4 +6,6 @@ static const FFInputFormat * const demuxer_list[] = {
     &ff_mp3_demuxer,
     &ff_ogg_demuxer,
     &ff_wav_demuxer,
+    &ff_ac3_demuxer,
+    &ff_eac3_demuxer,
     NULL };
diff --git a/chromium/config/Chrome/win/x64/config.h b/chromium/config/Chrome/win/x64/config.h
index 01114d6539..2bf150657a 100644
--- a/chromium/config/Chrome/win/x64/config.h
+++ b/chromium/config/Chrome/win/x64/config.h
@@ -674,7 +674,7 @@
 #define CONFIG_MUXERS 0
 #define CONFIG_PROTOCOLS 0
 #define CONFIG_AANDCTTABLES 0
-#define CONFIG_AC3DSP 0
+#define CONFIG_AC3DSP 1
 #define CONFIG_ADTS_HEADER 1
 #define CONFIG_ATSC_A53 1
 #define CONFIG_AUDIO_FRAME_QUEUE 0
diff --git a/chromium/config/Chrome/win/x64/config_components.h b/chromium/config/Chrome/win/x64/config_components.h
index 66c41749ef..cc3ded1a8b 100644
--- a/chromium/config/Chrome/win/x64/config_components.h
+++ b/chromium/config/Chrome/win/x64/config_components.h
@@ -10,7 +10,7 @@
 #define CONFIG_DCA_CORE_BSF 0
 #define CONFIG_DTS2PTS_BSF 0
 #define CONFIG_DV_ERROR_MARKER_BSF 0
-#define CONFIG_EAC3_CORE_BSF 0
+#define CONFIG_EAC3_CORE_BSF 1
 #define CONFIG_EVC_FRAME_MERGE_BSF 0
 #define CONFIG_EXTRACT_EXTRADATA_BSF 0
 #define CONFIG_FILTER_UNITS_BSF 0
@@ -338,8 +338,8 @@
 #define CONFIG_AAC_DECODER 1
 #define CONFIG_AAC_FIXED_DECODER 0
 #define CONFIG_AAC_LATM_DECODER 0
-#define CONFIG_AC3_DECODER 0
-#define CONFIG_AC3_FIXED_DECODER 0
+#define CONFIG_AC3_DECODER 1
+#define CONFIG_AC3_FIXED_DECODER 1
 #define CONFIG_ACELP_KELVIN_DECODER 0
 #define CONFIG_ALAC_DECODER 0
 #define CONFIG_ALS_DECODER 0
@@ -370,7 +370,7 @@
 #define CONFIG_DSICINAUDIO_DECODER 0
 #define CONFIG_DSS_SP_DECODER 0
 #define CONFIG_DST_DECODER 0
-#define CONFIG_EAC3_DECODER 0
+#define CONFIG_EAC3_DECODER 1
 #define CONFIG_EVRC_DECODER 0
 #define CONFIG_FASTAUDIO_DECODER 0
 #define CONFIG_FFWAVESYNTH_DECODER 0
@@ -559,11 +559,11 @@
 #define CONFIG_WEBVTT_DECODER 0
 #define CONFIG_XSUB_DECODER 0
 #define CONFIG_AAC_AT_DECODER 0
-#define CONFIG_AC3_AT_DECODER 0
+#define CONFIG_AC3_AT_DECODER 1
 #define CONFIG_ADPCM_IMA_QT_AT_DECODER 0
 #define CONFIG_ALAC_AT_DECODER 0
 #define CONFIG_AMR_NB_AT_DECODER 0
-#define CONFIG_EAC3_AT_DECODER 0
+#define CONFIG_EAC3_AT_DECODER 1
 #define CONFIG_GSM_MS_AT_DECODER 0
 #define CONFIG_ILBC_AT_DECODER 0
 #define CONFIG_MP1_AT_DECODER 0
@@ -953,7 +953,7 @@
 #define CONFIG_WMV3_VDPAU_HWACCEL 0
 #define CONFIG_AAC_PARSER 1
 #define CONFIG_AAC_LATM_PARSER 0
-#define CONFIG_AC3_PARSER 0
+#define CONFIG_AC3_PARSER 1
 #define CONFIG_ADX_PARSER 0
 #define CONFIG_AMR_PARSER 0
 #define CONFIG_AV1_PARSER 0
@@ -1621,7 +1621,7 @@
 #define CONFIG_AA_DEMUXER 0
 #define CONFIG_AAC_DEMUXER 1
 #define CONFIG_AAX_DEMUXER 0
-#define CONFIG_AC3_DEMUXER 0
+#define CONFIG_AC3_DEMUXER 1
 #define CONFIG_AC4_DEMUXER 0
 #define CONFIG_ACE_DEMUXER 0
 #define CONFIG_ACM_DEMUXER 0
@@ -1705,7 +1705,7 @@
 #define CONFIG_DXA_DEMUXER 0
 #define CONFIG_EA_DEMUXER 0
 #define CONFIG_EA_CDATA_DEMUXER 0
-#define CONFIG_EAC3_DEMUXER 0
+#define CONFIG_EAC3_DEMUXER 1
 #define CONFIG_EPAF_DEMUXER 0
 #define CONFIG_EVC_DEMUXER 0
 #define CONFIG_FFMETADATA_DEMUXER 0
diff --git a/chromium/config/Chrome/win/x64/libavcodec/codec_list.c b/chromium/config/Chrome/win/x64/libavcodec/codec_list.c
index c9666ae199..75415127f1 100644
--- a/chromium/config/Chrome/win/x64/libavcodec/codec_list.c
+++ b/chromium/config/Chrome/win/x64/libavcodec/codec_list.c
@@ -15,4 +15,7 @@ static const FFCodec * const codec_list[] = {
     &ff_pcm_u8_decoder,
     &ff_libopus_decoder,
     &ff_hevc_decoder,
+    &ff_ac3_decoder,
+    &ff_eac3_decoder,
+    &ff_ac3_fixed_decoder,
     NULL };
diff --git a/chromium/config/Chrome/win/x64/libavcodec/parser_list.c b/chromium/config/Chrome/win/x64/libavcodec/parser_list.c
index c85087a596..a9e086ef6d 100644
--- a/chromium/config/Chrome/win/x64/libavcodec/parser_list.c
+++ b/chromium/config/Chrome/win/x64/libavcodec/parser_list.c
@@ -7,4 +7,5 @@ static const AVCodecParser * const parser_list[] = {
     &ff_vorbis_parser,
     &ff_vp9_parser,
     &ff_hevc_parser,
+    &ff_ac3_parser,
     NULL };
diff --git a/chromium/config/Chrome/win/x64/libavformat/demuxer_list.c b/chromium/config/Chrome/win/x64/libavformat/demuxer_list.c
index 29f1f59381..6fb0769ce7 100644
--- a/chromium/config/Chrome/win/x64/libavformat/demuxer_list.c
+++ b/chromium/config/Chrome/win/x64/libavformat/demuxer_list.c
@@ -6,4 +6,6 @@ static const FFInputFormat * const demuxer_list[] = {
     &ff_mp3_demuxer,
     &ff_ogg_demuxer,
     &ff_wav_demuxer,
+    &ff_ac3_demuxer,
+    &ff_eac3_demuxer,
     NULL };
diff --git a/ffmpeg_generated.gni b/ffmpeg_generated.gni
index c279607332..012c89422f 100644
--- a/ffmpeg_generated.gni
+++ b/ffmpeg_generated.gni
@@ -232,7 +232,19 @@ if ((is_apple && ffmpeg_branding == "Chrome") ||
     "libavcodec/hevc_sei.c",
     "libavcodec/hevcdec.c",
     "libavcodec/hevcdsp.c",
-    "libavcodec/hevcpred.c"
+    "libavcodec/hevcpred.c",
+    "libavcodec/x86/ac3dsp_init.c",
+    "libavcodec/ac3dsp.c",
+    "libavcodec/fmtconvert.c",
+    "libavcodec/ac3tab.c",
+    "libavcodec/ac3dec_float.c",
+    "libavcodec/ac3.c",
+    "libavcodec/x86/fmtconvert_init.c",
+    "libavcodec/ac3dec_data.c",
+    "libavcodec/eac3dec.c",
+    "libavcodec/eac3_data.c",
+    "libavcodec/ac3dec_fixed.c",
+    "libavformat/ac3dec.c",
   ]
 
   ffmpeg_c_sources += [
@@ -287,7 +299,10 @@ if ((is_apple && current_cpu == "x64" && ffmpeg_branding == "Chrome") ||
     "libavcodec/x86/hevc_mc.asm",
     "libavcodec/x86/hevc_sao.asm",
     "libavcodec/x86/hevc_sao_10bit.asm",
-    "libavcodec/x86/h26x/h2656_inter.asm"
+    "libavcodec/x86/h26x/h2656_inter.asm",
+    "libavcodec/x86/ac3dsp.asm",
+    "libavcodec/x86/ac3dsp_downmix.asm",
+    "libavcodec/x86/fmtconvert.asm"
   ]
 
   ffmpeg_c_sources += [