android - How to convert 44100 stereo to 11025 mono programmatically? -

-

i using ffmpeg (c++) decode variety of audio files 44100 stereo or mono (according source). have keep because play them too. meanwhile, need 11025 mono versions of these. trying find quick/easy way convert 44100 stereo pcm 11025 mono without ffmpeg save cpu.

is possible in java (android) or c++ (ndk)?

i using java , c++ in same project.

sample-by-sample averaging correct stereo mono conversion, sample rate conversion, why not use library libsamplerate? if heavy, averaging indeed fast, not correct method. whether acceptable or not depends on application. alternative method described in answer post:

how convert pcm samples in byte array floating point numbers in range -1.0 1.0 , back?


Comments

Post a Comment

Popular posts from this blog

html5 - What is breaking my page when printing? -

-
Image
i have questioner , don't know why when printing it's creating break before first question. live demo (link) i able resolve issue removing fieldset container had wrapped in.. having fieldset element causing of fields grouped together, , since not fit on first page, being pushed second page. removing fieldset element, able firefox print first 2 questions on page 1 identically chrome. it seems not new problem firefox , fieldset not playing nice found old bugzilla ticket 2008 has persisted , still being commented on in 2014 (link) if retaining fieldset important, found solution else came here (link) <script type='text/javascript'> $(window).bind('beforeprint', function(){ $('fieldset').each( function(item) { $(this).replacewith($('<div class="fieldset">' + this.innerhtml + '</div>')); } ) }); $(window).bind(
Read more

html - Unable to style the color of bullets in a list -

-
i'm trying change colour of list points it's not working? <div class="mobile-menu" id="mobile-menu"> <div id="mobile-menu-links"> <h4>general:</h4> <ul class="mobile-menu-links"> <li><a href="">news</a></li> <li><a href="">the boring rules!</a></li> <li><a href="">the rankings</a></li> </ul> .mobile-menu #mobile-menu-links ul{ list-style-type: none; margin:0; padding-left:3%; } .mobile-menu #mobile-menu-links ul li{ padding-bottom:2px; border-bottom:1px solid #bababa; } if add color:red in either of 2 css declarations, doesn't change colour. please note html closed in document, copi
Read more

c# - must be a non-abstract type with a public parameterless constructor in redis -

-
when save object, got below error must non-abstract type public parameterless constructor in order use parameter 't' in generic type or method 'servicestack.redis.redisclient.store<t>(t) redisclass.getinstnace().store(msg); // error here redisclass.getinstnace().save(); as third party's class, can not edit how save object? could create wrapper around third party object call constructor, store wrapper? e.g. public class mywrapper { public thirdpartyobject thirdpartyinstance { get; set; } public mywrapper() { thirdpartyinstance = new thirdpartyobject("constructors"); } }
Read more