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http://dev.sourcefabric.org/browse/LS-631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=29602#action_29602
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Robbt commented on LS-631:
--------------------------
I had a similar issue with this in Airtime, this was for a shoutcast stream
that was mono. I changed the stream to stereo and liquidsoap played it fine.
I'm cross-linking the bug reports here is the Airtime one
http://dev.sourcefabric.org/browse/CC-4760.
Within the context of the airtime liquid soap script things went really awry
after it got the error, liquidsoap basically froze becoming unresponsive to the
telnet interface and having 100% CPU utilization. When I simply tried to play
the script via the CLI it just gave the error about 2012/12/27 23:02:14
[clock.wallclock_alsa:2] Source alsa_out(default) failed while streaming:
Audio_converter.Samplerate.Invalid_data!.
The bad part was freezing liquid soap in airtime, but perhaps that is just a
fault in their script where it doesn't deal with this error in the first place.
So I just wanted to throw out what I could. Switching the stream to stereo
appears to have fixed it though.
> Incorrect typing of channels for input.http
> -------------------------------------------
>
> Key: LS-631
> URL: http://dev.sourcefabric.org/browse/LS-631
> Project: Liquidsoap
> Issue Type: Bug
> Reporter: Samuel Mimram
> Priority: Major
>
> The following was reported on the mailing list!
> liquidsoap
> 'output.alsa(mksafe(input.http("http://mp36.bbc.streamuk.com:80/";)))'
> Here is the Liquidsoap output:
> 2012/09/07 17:19:08 [alsa_out(default):3] Using ALSA 1.0.23.
> 2012/09/07 17:19:08 [alsa_out(default):2] Falling back on interleaved S16LE
> 2012/09/07 17:19:08 [alsa_out(default):3] Samplefreq=44100Hz,
> Bufsize=1048576B, Frame=4B, Periods=1024
> 2012/09/07 17:19:08 [decoder:3] Method "MAD" accepted "audio/mpeg".
> 2012/09/07 17:19:08 [http_4984:3] Decoding...
> 2012/09/07 17:19:08 [mksafe:3] Switch to http_4984 with transition.
> 2012/09/07 17:19:08 [http_4984:3] Incorrect stream type!
> 2012/09/07 17:19:08 [mksafe:3] Switch to safe_blank with forgetful transition.
> 2012/09/07 17:19:08 [http_4984:2] Feeding stopped: Incorrect stream type!
> 2012/09/07 17:19:11 [decoder:3] Method "MAD" accepted "audio/mpeg".
> 2012/09/07 17:19:11 [http_4984:3] Decoding...
> 2012/09/07 17:19:11 [mksafe:3] Switch to http_4984 with transition.
> 2012/09/07 17:19:11 [http_4984:3] Incorrect stream type!
> 2012/09/07 17:19:11 [mksafe:3] Switch to safe_blank with forgetful transition.
> 2012/09/07 17:19:11 [http_4984:2] Feeding stopped: Incorrect stream type!
> The "incorrect stream type" error comes from generator.ml and is due to the
> fact that we get only one audio channel (the BBC stream is mono) whereas we
> expect two (stereo). This should either
> - have been detected at typing type
> - have produced a better error message
> - (my prefered for now) have produced a stereo stream
> The snippet above can of course be corrected by inserting an audio_to_stereo
> but the user has no idea about it from the error message...
> More generally, while the typing of audio channels is theoretically nice, it
> seems to have produced a lot of errors for not much for now. My point of view
> is that at least conversion mono -> n channels should be implicit...
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