Audio is missing from nDVR with AAC Audio and Dolby

Wowza Streaming Engine
1

I am having problems with nDVR with AAC Audio. The same stream, on “Live mode” is OK.

The information regarding audio is missing from the manifest when you add the “?DVR” at the end

The problem persist, even when I enable “mpegtsImportAC3”, per stream, or in Application Settings.

Here are some output from the HLS manifest file, as you can see, the audio codec is missing

Without DVR:

wget -qO - ‘http://172.27.1.10:1935/live/Test.stream/playlist.m3u8’

#EXTM3U

#EXT-X-VERSION:3

#EXT-X-STREAM-INF:BANDWIDTH=8345602,CODECS=“avc1.100.40,ac-3”,RESOLUTION=1920x1080

chunklist_w1869645429.m3u8

DVR:

wget -qO - ‘http://172.27.1.10:1935/live/Test.stream/playlist.m3u8?DVR’

#EXTM3U

#EXT-X-VERSION:3

#EXT-X-STREAM-INF:BANDWIDTH=6064531,CODECS=“avc1.100.40”,RESOLUTION=1920x1080

chunklist_w1681468935_DVR.m3u8

Test.Stream

{

uri: “udp://227.0.0.70:2022”,

mpegtsImportAC3:true

}

wowza version 4.5.0 (build 18676)

2

Hi,

The nDVR functionality does not support AC3 audio. Please see this article showing the codecs that are supported with nDVR.

To use the nDVR functionality, the audio will need to be MP3 or AAC. Unfortunately out transcoder does not support the decoding of AC3 audio so this change will need to be at the source or at some point prior to ingesting the stream.

Regards,

Paul