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http://dev.sourcefabric.org/browse/LS-631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=29682#action_29682
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Samuel Mimram commented on LS-631:
----------------------------------
The situation has improved with an explicit error message:
a33eaa59c4709ddcd69d04c07a027db5ef427ed4.
> 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: Blocker
>
> 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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