CPU utilization when using gst-launch play mp3

[Stefan Sauer]

On 07/02/2012 12:50 PM, Soho Soho123 wrote:
> Dears,
>
> Could you kindly show the example about the option?
Jan mentoned the options below and how you can see them.
> Since I  do not enable Orc lib.
You want to use orc if you use elements that have orc optimizations.
> I do not have idea about the option to reduce CPU utilizatgion.
> And do you have suggestion about mp3 decoder?
> mad is used currently.
mad focuses on quality. having a mp3 decoder based on libmpeg123 would
be faster, but no one finished the work on it ever.

Stefan
>
> Thanks!
> sOHO
>
> 2012/6/29 Jan Schmidt <thaytan at noraisin.net>:
>> 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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>> --
>> Jan Schmidt <thaytan at noraisin.net>
>>
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