add aac_adtstoasc bitstream filter for mpegts to mp4 conversion

Jellyfin.Api/Controllers/DynamicHlsController.cs

@@ -1444,7 +1444,19 @@ namespace Jellyfin.Api.Controllers
             {
                 if (EncodingHelper.IsCopyCodec(audioCodec))
                 {
-                    return "-acodec copy -strict -2";
+                    var segmentFormat = HlsHelpers.GetSegmentFileExtension(state.Request.SegmentContainer).TrimStart('.');
+                    var bitStreamArgs = string.Empty;
+
+                    // Apply aac_adtstoasc bitstream filter when media source is in mpegts.
+                    if (string.Equals(segmentFormat, "mp4", StringComparison.OrdinalIgnoreCase)
+                        && (string.Equals(state.MediaSource.Container, "mpegts", StringComparison.OrdinalIgnoreCase)
+                            || string.Equals(state.MediaSource.Container, "hls", StringComparison.OrdinalIgnoreCase)))
+                    {
+                        bitStreamArgs = _encodingHelper.GetBitStreamArgs(state.AudioStream);
+                        bitStreamArgs = !string.IsNullOrEmpty(bitStreamArgs) ? " " + bitStreamArgs : string.Empty;
+                    }
+
+                    return "-acodec copy -strict -2" + bitStreamArgs;
                 }
 
                 var audioTranscodeParams = new List<string>();
@@ -1473,13 +1485,24 @@ namespace Jellyfin.Api.Controllers
             if (EncodingHelper.IsCopyCodec(audioCodec))
             {
                 var videoCodec = _encodingHelper.GetVideoEncoder(state, _encodingOptions);
+                var segmentFormat = HlsHelpers.GetSegmentFileExtension(state.Request.SegmentContainer).TrimStart('.');
+                var bitStreamArgs = string.Empty;
+
+                // Apply aac_adtstoasc bitstream filter when media source is in mpegts.
+                if (string.Equals(segmentFormat, "mp4", StringComparison.OrdinalIgnoreCase)
+                    && (string.Equals(state.MediaSource.Container, "mpegts", StringComparison.OrdinalIgnoreCase)
+                        || string.Equals(state.MediaSource.Container, "hls", StringComparison.OrdinalIgnoreCase)))
+                {
+                    bitStreamArgs = _encodingHelper.GetBitStreamArgs(state.AudioStream);
+                    bitStreamArgs = !string.IsNullOrEmpty(bitStreamArgs) ? " " + bitStreamArgs : string.Empty;
+                }
 
                 if (EncodingHelper.IsCopyCodec(videoCodec) && state.EnableBreakOnNonKeyFrames(videoCodec))
                 {
-                    return "-codec:a:0 copy -strict -2 -copypriorss:a:0 0";
+                    return "-codec:a:0 copy -strict -2 -copypriorss:a:0 0" + bitStreamArgs;
                 }
 
-                return "-codec:a:0 copy -strict -2";
+                return "-codec:a:0 copy -strict -2" + bitStreamArgs;
             }
 
             var args = "-codec:a:0 " + audioCodec;

Jellyfin.Api/Controllers/VideoHlsController.cs

@@ -439,7 +439,19 @@ namespace Jellyfin.Api.Controllers
             {
                 if (EncodingHelper.IsCopyCodec(audioCodec))
                 {
-                    return "-acodec copy -strict -2";
+                    var segmentFormat = HlsHelpers.GetSegmentFileExtension(state.Request.SegmentContainer).TrimStart('.');
+                    var bitStreamArgs = string.Empty;
+
+                    // Apply aac_adtstoasc bitstream filter when media source is in mpegts.
+                    if (string.Equals(segmentFormat, "mp4", StringComparison.OrdinalIgnoreCase)
+                        && (string.Equals(state.MediaSource.Container, "mpegts", StringComparison.OrdinalIgnoreCase)
+                            || string.Equals(state.MediaSource.Container, "hls", StringComparison.OrdinalIgnoreCase)))
+                    {
+                        bitStreamArgs = _encodingHelper.GetBitStreamArgs(state.AudioStream);
+                        bitStreamArgs = !string.IsNullOrEmpty(bitStreamArgs) ? " " + bitStreamArgs : string.Empty;
+                    }
+
+                    return "-acodec copy -strict -2" + bitStreamArgs;
                 }
 
                 var audioTranscodeParams = new List<string>();
@@ -467,7 +479,19 @@ namespace Jellyfin.Api.Controllers
 
             if (EncodingHelper.IsCopyCodec(audioCodec))
             {
-                return "-codec:a:0 copy -strict -2";
+                var segmentFormat = HlsHelpers.GetSegmentFileExtension(state.Request.SegmentContainer).TrimStart('.');
+                var bitStreamArgs = string.Empty;
+
+                // Apply aac_adtstoasc bitstream filter when media source is in mpegts.
+                if (string.Equals(segmentFormat, "mp4", StringComparison.OrdinalIgnoreCase)
+                    && (string.Equals(state.MediaSource.Container, "mpegts", StringComparison.OrdinalIgnoreCase)
+                        || string.Equals(state.MediaSource.Container, "hls", StringComparison.OrdinalIgnoreCase)))
+                {
+                    bitStreamArgs = _encodingHelper.GetBitStreamArgs(state.AudioStream);
+                    bitStreamArgs = !string.IsNullOrEmpty(bitStreamArgs) ? " " + bitStreamArgs : string.Empty;
+                }
+
+                return "-acodec copy -strict -2" + bitStreamArgs;
             }
 
             var args = "-codec:a:0 " + audioCodec;

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -596,10 +596,17 @@ namespace MediaBrowser.Controller.MediaEncoding
                 || codec.IndexOf("hevc", StringComparison.OrdinalIgnoreCase) != -1;
         }
 
-        // TODO This is auto inserted into the mpegts mux so it might not be needed
-        // https://www.ffmpeg.org/ffmpeg-bitstream-filters.html#h264_005fmp4toannexb
+        public bool IsAAC(MediaStream stream)
+        {
+            var codec = stream.Codec ?? string.Empty;
+
+            return codec.IndexOf("aac", StringComparison.OrdinalIgnoreCase) != -1;
+        }
+
         public string GetBitStreamArgs(MediaStream stream)
         {
+            // TODO This is auto inserted into the mpegts mux so it might not be needed
+            // https://www.ffmpeg.org/ffmpeg-bitstream-filters.html#h264_005fmp4toannexb
             if (IsH264(stream))
             {
                 return "-bsf:v h264_mp4toannexb";
@@ -608,6 +615,11 @@ namespace MediaBrowser.Controller.MediaEncoding
             {
                 return "-bsf:v hevc_mp4toannexb";
             }
+            else if (IsAAC(stream))
+            {
+                // convert adts header(mpegts) to asc header(mp4)
+                return "-bsf:a aac_adtstoasc";
+            }
             else
             {
                 return null;