CPU utilization when using gst-launch play mp3

[Jan Schmidt]

On Fri, 2012-06-29 at 15:25 +0200, Stefan Sauer wrote:
> On 06/29/2012 10:11 AM, brad2012 wrote:
> > Dears, 
> >
> > Is there any method to reduce CPU utilization when play mp3?
> >
> > When I try to play mp3 by the command:
> > gst-launch-0.10 filesrc location=/var/tmp/usb/sda1/audio_src/1503-9.mp3 !
> > mad ! audioconvert ! audioresample ! audio/x-raw-int,
> > rate=48000,width=16,endianness=4321 ! alsasink device="hw:0,0"
> Yes there is a simple way to lower the CPU load. Use an optimized mp3
> decoder. Avoid audioconvert (by ensuring your mp3 decoder will output in
> a format suitable for your sink). Also fix your alsa driver to properly
> report formats, so that you don't need the capsfilter.

Another couple of options: run gst-inspect on audioconvert and
audioresample, and note that both have options for reducing the amount
of work they do (turning off dithering for audioconvert, and reducing
the quality/filter length of the resampling)

- Jan.

> 
> Stefan
> >
> > the alsa device is I2S+audio codec in our embedd platform.
> > the device report sample rate available is 48K
> > but I have to set playing rate to audio codec  is 8Khz, such that the audio
> > data can be sent to codec.
> >
> > But it is now problem about playing .wav file with sample rate conversion by
> > "aplay" on our embedded platform (without any modificiation).
> >
> > Is it possible to reduce CPU utilization about gst-launch playing mp3 audio?
> >
> >
> >
> >
> > --
> > View this message in context: http://gstreamer-devel.966125.n4.nabble.com/CPU-utilization-when-using-gst-launch-play-mp3-tp4655434.html
> > Sent from the GStreamer-devel mailing list archive at Nabble.com.
> > _______________________________________________
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> > gstreamer-devel at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> 
> 
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-- 
Jan Schmidt <thaytan at noraisin.net>