c# - Mix two or more mp3 files into one, keeping high performance -

-

i have problem mixing 2 mp3 files one. actually, i've found test code using naudio library, slow me. new "audio programming" need help, advice how make algorithm solving problem faster code below.

the code mixes 2 files 1 in 8+seconds much slow. actually, checked , convertwavtomp3() lasts 8 seconds. files 1.mp3 , 2.mp3 3+ minutes long.

    static void main(string[] args)     {         var watch = stopwatch.startnew();         watch.start();         var path = @"c:\users\gutek\desktop\";         // read mp3 files disk         mp3filereader mpbacground = new mp3filereader(path + "1.mp3");         mp3filereader mpmessage = new mp3filereader(path + "2.mp3");          //convert them wave stream or decode mp3 file         wavestream background = waveformatconversionstream.createpcmstream(mpbacground);         wavestream message = waveformatconversionstream.createpcmstream(mpmessage);          var mixer = new wavemixerstream32();         mixer.autostop = true;          var messageoffset = background.totaltime;         var messageoffsetted = new waveoffsetstream(         message, timespan.fromseconds(10), timespan.zero, message.totaltime.subtract(timespan.fromseconds(30)));          var background32 = new wavechannel32(background);         background32.padwithzeroes = false;         // set volume of background file         background32.volume = 0.4f;         //add stream mixer         mixer.addinputstream(background32);          var message32 = new wavechannel32(messageoffsetted);         message32.padwithzeroes = false;         // set volume of 2nd mp3 song         message32.volume = 0.6f;         mixer.addinputstream(message32);         var wave32 = new wave32to16stream(mixer);         //encode wave stream mp3         var mp3stream = convertwavtomp3(wave32);         // write mp3 on disk         file.writeallbytes(path + "output.mp3", mp3stream.toarray());         watch.stop();         console.writeline(watch.elapsedmilliseconds);         console.readkey();     }      public static memorystream convertwavtomp3(wave32to16stream wavfile)     {         using (var retms = new memorystream())         using (var wtr = new lamemp3filewriter(retms, wavfile.waveformat, 128))         {             wavfile.copyto(wtr);             return retms;         }     }


Comments

Post a Comment

Popular posts from this blog

c++ - llvm function pass ReplaceInstWithInst malloc -

-
#include "llvm/pass.h" #include "llvm/ir/module.h" #include "llvm/ir/function.h" #include "llvm/support/raw_ostream.h" #include "llvm/ir/legacypassmanager.h" #include "llvm/ir/instrtypes.h" #include "llvm/transforms/ipo/passmanagerbuilder.h" #include "llvm/ir/irbuilder.h" #include "llvm/transforms/utils/basicblockutils.h" using namespace llvm; namespace { struct replacepass : public functionpass { static char id; replacepass() : functionpass(id) {} virtual bool runonfunction(function &f) { allocainst* insttoreplace = ??? basicblock::iterator ii(insttoreplace); replaceinstwithinst(insttoreplace->getparent()->getinstlist(), ii, new allocainst(type::int32ty, 0, insttoreplace)); return true; } }; } char replacepass::id = 0; static void registerreplacepass(const passmanagerbuilder &, legacy::passmanagerbase &pm) { pm.add(new re...
Read more

Cross-Compiling Linux Kernel for Raspberry Pi - ${CCPREFIX}gcc -v does not work -

-
i'm trying follow this guide . i'm running both ubuntu 12.04.5 lts (gnu/linux 3.13.0-74-generic x86_64) on "real" hardware , 14.04.1 via virtualbox on mac. problem don't past step 1: hoffmann@angl99:~$ export ccprefix=/home/hoffmann/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf- hoffmann@angl99:~$ ${ccprefix}gcc -v i'm getting following error: -bash: /home/hoffmann/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc: no such file or directory however, file i'm told missing there: hoffmann@angl99:~$ less /home/hoffmann/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc "/home/hoffmann/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc" may binary file. see anyway? this result of basic error/misconception. suggest solution? thanks! sebastian ok - i've worked out (with of person po...
Read more

java.lang.NoClassDefFoundError When Creating New Android Project -

-
i've tried installing (and re-installing) android studio several times now, , each time, studio isn't able create new android project. when attempt initial android studio window (ie. basic 'create', 'open', 'import' etc options), i'm asked of questions in wizard, brief progress dialog, followed nothing @ all. if open incomplete project process creates choosing 'open' list, can try choosing create new android project menu. this has same issue, error message in output console time... java.lang.noclassdeffounderror: com/sun/xml/internal/bind/v2/model/annotation/annotationreader (wrong name: com/sun/xml/internal/bind/v0/model/qnnotation/annotationreader) note: when installed android studio, installed incompatible jdk (1.8, not 1.7). have had go default project settings change jdk uses 1.8. does know how can avoid this? there place should downloading jxb classes? missing in java paths? this appears have been caused cor...
Read more