Audio only Playlist is loaded twice -> fragParsingError

[Benny739]

Hi,

hls.js loads my audio playlist twice and then throws an "fragParsingError" error.

The stream plays fine, but in safari it ends in a BufferStalledError after some time. (Shaka and native hls are playing the file without problems)
The interesting part is that the msn varies where hls.js says there is no media.

I'm not sure if there is a problem in my playlist & media files or if the playlist is loaded twice means that hls.js tries to load it as video and as audio and doesn't find any media in the video stream.

Repro: https://hlsjs.video-dev.org/demo/?src=https%3A%2F%2Fvod-qa-hdd-01.b-cdn.net%2F3InDYWsdUyklwEfMCl9j%2F90516808-a56e-4bae-8b55-f56b0e069abc%2Fhls.m3u8&demoConfig=eyJlbmFibGVTdHJlYW1pbmciOnRydWUsImF1dG9SZWNvdmVyRXJyb3IiOmZhbHNlLCJzdG9wT25TdGFsbCI6ZmFsc2UsImR1bXBmTVA0IjpmYWxzZSwibGV2ZWxDYXBwaW5nIjotMSwibGltaXRNZXRyaWNzIjotMX0=

[robwalch]

The audio playlist is loaded twice because you've repeated it in the audio media option:

There is no need for this redundancy. If the audio option describes the audio in the main variant then there is no need to include the URI:

#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio",LANGUAGE="de",NAME="Deutsch",AUTOSELECT=YES,DEFAULT=YES,CHANNELS="2",URI="audio-de-mp4a.40.2.m3u8"
#EXT-X-STREAM-INF:AUDIO="audio",AVERAGE-BANDWIDTH=143911,BANDWIDTH=180750,CODECS="mp4a.40.2"
audio-de-mp4a.40.2.m3u8

[Benny739]

Thanks for your help, when I remove the part everything plays fine and the fragParsingError and the bufferStalledError disappear.

The playlist has been created with bento4, so I assume more people might run into the same problem. Imho including the playlist twice shouldn't lead to a fragParsingError.
What is your opinion here?

[robwalch]

Please file a Bug Report so that we can track this as a bug or enhancement request.