MusicAssistant stutters / does not work while playin by URL AAC DVB-S2 radio streams.

[OzGav]

Discussed in https://github.com/orgs/music-assistant/discussions/3682

^{Originally posted by MartB March 8, 2025}
I'm using 2.5.0b9 and I tried out the new add-by-url source and it doesn't want to work with my TV-Headend setup.

It should supply an AAC stream received over DVB-S to MusicAssistant. If I run a slightly adjusted music-assistant ffmpeg command locally, it works perfectly.

ffmpeg -hide_banner -loglevel info -nostats -ignore_unknown -protocol_whitelist file,hls,http,https,tcp,tls,crypto,pipe,data,fd,rtp,udp,concat -reconnect 1 -reconnect_delay_max 30 -reconnect_streamed 1 -reconnect_on_network_error 1 -reconnect_on_http_error 5xx,4xx -i http://10.0.1.230:9981/stream/channelid/810612493?profile=audiopass -af aresample=resampler=soxr:precision=30:osr=44100 -ac 2 -channel_layout stereo -ar 44100 -acodec pcm_s16le -f s16le -f nut pipe: | ffplay -f nut -probesize 32 -sync ext -i pipe:

This yields

Input £0, aac, from 'http://10.0.1.230:9981/stream/channelid/810612493?profile=audiopass':
  Duration: N/A, bitrate: 128 kb/s
  Stream £0:0: Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
Stream mapping:
  Stream £0:0 -> £0:0 (aac (native) -> pcm_s16le (native))

However, on the docker container, it fails to play or stutters/gets stuck all the time.
My audio players are using Airplay and I tried changing every possible option to no avail.

Does anyone have an idea whats going on? Is this a known issue?

Edit: It seems like there is absolutely no audio queue so whenever it drops to 0 it stutters and only recovers after a while (or never). If i press pause manually and then unpause after 2 seconds it usually just works fine.

[marcelveldt]

I changed the core logic a tiny bit to pre-pad some silence for non-buffered streams which should (theoretically) fix this issue.
This change will be available in the next beta (2.5.0b11) so keep an eye on that and re-test.

[OzGav]

@MartB please check if this has been resolved in 2.5.0b11

[MartB]

@OzGav @marcelveldt You guys are fast! Thanks for this, it works fine with the streams i have.

[MartB]

Small update: @OzGav and @marcelveldt this did not end up reliably fixing the problem. If you happen to know what else could be tried feel free to re-evaluate.

[marcelveldt]

Without a way to test/reproduce this, I can not do anything.