Audio streaming on Linux not working | Connection immediately terminated

[FinalSh4re]

Hi,

first of all thanks for your hard work. I can't get the audio casting on Linux (Manjaro 20.2.1) to work though. The renderer is found on the network, but the connection is terminated immediately. No audio is played either.

I attach the log, maybe you can see where this is going wrong. If you need further information, let me know.

Cheers!

Log file: log.txt

[dheijl]

Everything seems to work as expected for an AVTransport DLNA player, except for the streaming of the music. It's possible that it does not accept the "naked" PCM audio stream (audio/l16), perhaps it needs a WAV header, maybe the same problem as with Sonos speakers. I could make a test release that sends the stream in WAV format if you're interested.

[FinalSh4re]

Sure, if you think that will do the trick I would appreciate it.

[dheijl]

OK I'll look into the WAV format and will try to get that working here. If it works I'll make a beta release. Thanks!

[dheijl]

There's a new beta in releases with WMA file format support.

[FinalSh4re]

Thank you, I made a test run and checked a few different setting combinations. The connection is now stable and no longer drops, however i hear mostly static noise through the speakers.

[dheijl]

Yes, it's not OK yet. But I think I know where the static noise comes from.

[dheijl]

What combination of settings got you the stable connection?

[FinalSh4re]

The connection was stable as long as the new 'Use WMA/WAV Format'-Checkbox was toggled.

[dheijl]

OK thanks!

[dheijl]

In theory the WAV format is correct now (in the 1.3.5-beta) for "infinite" streaming, depending on how the renderer opens the stream.

[FinalSh4re]

It works like a charm. Thanks a lot!

Just fyi I seem to get the best result with the "use wma/wav format" + "disable chunked transfer encoding" boxes toggled. Without the latter checked the audio seems a bit unstable at times (noise and stuttering), nothing major but still noticeable. I tested it against the same source audio streamed from my iPhone and both streams sound the same to me. Hope this helps.

Cheers!

[dheijl]

Thanks for the feedback! Glad that it works for you, it does not work for me with a Volumio streamer because of the libsndfile problem, so I can not test it myself.

[dheijl]

As an aside: on Linux if you run swyh-rs as root (sudo) it will renice itself to a higher priority in an attempt to prevent stuttering. Or you can renice it yourself once it is running. On Windows it will always raise priority a bit.

[FinalSh4re]

Thanks for letting me know, you also mentioned this in the documentation. I'll try giving the process a higher priority should I encounter any performance issues. So far turning off the chunked transfer encoding has been enough to get stable output. However, I haven't really tested streaming while running any resource intensive processes in parallel so this option might come in handy in the future.