Hey Liquidsoap crew,
This is more of a question coming at things from the LibreTime
experience with Liquidsoap. We occasionally have issues where tracks end
prematurely and then our python based interface screws things up and
ends up scheduling tracks when they shouldn't play and then it fails to
tell liquidsoap to play something new. See -
https://github.com/LibreTime/libretime/issues/699
It basically ends up in a cascade of failures where our schedule is
playing shows like 45 minutes after they should have ended.
It all seems to occur with End of track before cue-out point which was
also mentioned on this bug https://github.com/savonet/liquidsoap/issues/66
This whole scenario is kind of a nightmare from a broadcast perspective
and probably has to do with the loose coupling between the web interface
and the liquidsoap playout inherent in the design we inherited from airtime.
Some of the bugs are probably in the python module airtime-playout that
provides the interface between the schedule on our php based web
platform and liquidsoap. I plan on diving into how it is working and
hopefully improving it and avoid some of these errors or at least catch
them and get things back on track sooner.
We have an issue where our airtime_analyzer doesn't validate the track
length in a way that causes dead air - basically if a file is incomplete
or was cut off and it doesnt match the length the id3 tags say it should
have it will give the error above because it will die before the cut out
point see - https://github.com/LibreTime/libretime/issues/537
My ultimate question for liquidsoap at this point is whether there is a
way to test the ability of liquidsoap to parse a file and get what it
sees as the length etc ahead of time. This way we could in theory
integrate this into our analyzer script so that we can reject tracks
that will fail to play or will play with incorrect length. Relying upon
mutagen to analyze the metadata is insufficient to determine whether a
track will actually play as we can see by the bug with the issue of dash
formatted m4a files - see https://github.com/savonet/liquidsoap/issues/713
I also need to understand how the integration of ffmpeg works with
liquidsoap as a decoder/parser are there any docs on this, i tried
searching liquidsoap.info but did not see anything.
Thanks for any help on this.
Robbt
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