[Voyage-linux] Max CPU with mpd's httpd streaming server

[Norman Henderson]

Thanks for the quick reply, I was afraid that was the problem! I'll try
tweaking the quality though.

On Fri, Nov 26, 2010 at 09:22, Kim-man 'Punky' TSE <punkytse at punknix.com>wrote:

> Hi Norman,
>
> I tried http streaming even before voyage mpd is announced.  ALIX is
> underpower and cannot fit http streaming purpose.  If you define bitrate it
> is even worse.  It is better if you set quality instead of bitrate in your
> configuration below, but you would still expect some skips.    In addition,
> change from stereo to mono makes CPU consume less, i.e. format =
> "44100:16:1".
>
> May be you can try icecast to see if it gets better...
>
> Regards,
> Punky
>
>
> On 11/26/2010 5:03 PM, Norman Henderson wrote:
>
>> Hi, I have a Voyage 0.6.5 system on which I run a number of different
>> things including mpd. It works fine for playback through the ALSA device
>> (headphone jack) with about 15% CPU use. However when I set up an httpd
>> output and connect to it from my laptop (with the browser or with VLC, etc.)
>> CPU immediately goes to almost 100% and the playback starts to skip (both
>> through the ALSA and through the laptop).
>>
>> At first I thought this was because I was streaming vorbis and the music
>> files (which are on a local USB drive) are mp3. So with some pain I compiled
>> mpd 0.15.15 with lame support and got that working. However my high CPU
>> problem is still there. I believe the output matches the file format so
>> there shouldn't be any resampling (but I don't know a lot about this stuff):
>>
>> audio_output {
>>        type            "httpd"
>>        name            "Voyage HTTP Stream"
>>        encoder         "lame"          # optional, vorbis or lame
>>        port            "8000"
>> #       quality         "5.0"                   # do not define if bitrate
>> is defined
>>        bitrate         "192"                    # do not define if quality
>> is defined
>>        format          "44100:16:2"
>> }
>> Incidentally results were the same with the default bitrate 128, or with
>> 96, and with 1 instead of 2 channels in the format.
>>
>> The system also has a Samba server running and if I use e.g. VLC on my
>> laptop to just play the files from the network share that's fine too, no
>> skipping and normal CPU usage - so I don't think it's a networking issue.
>>
>> Any suggestions? Does the new Voyage MPD build support playback of mp3's
>> over mpd's built-in httpd streaming server without problems, and is there
>> anything special about the configuration?
>> - Norm
>>
>>
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>> Voyage-linux at list.voyage.hk
>> http://list.voyage.hk/mailman/listinfo/voyage-linux
>>
>
>
> --
> Regards,
> Punky
>
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