Android - Concatenate encoded mp3 data and mp3 file data -


i need create audio file made of audio data comes 2 different sources. 1 microphone, recorded audio mp3 file.

i converting read data microphone mp3 using lame library , writing fileoutputstream this:

bytesread = audiorecord.read(buffer, 0, minbuffer); int bytesencoded = androidlame.encode(buffer, buffer, bytesread, mp3buffer); outputstream.write(mp3buffer, 0, bytesencoded);

and have got inputstream (mp3 files) writing same fileoutputstream this:

int buffersize = 1024; byte[] buffer = new byte[buffersize]; int readbytes = 0; while ((readbytes = inputstream.read(buffer)) != -1) {             outputstream.write(buffer, 0, readbytes); }

i need alternate these 2 sources , write 1 source @ time. and, want output in mp3 format.

currently, these codes working fine if write data 1 source.

but when i, example, first write data coming file , stop it, , continue writing data coming mic, not working.

i found reason. turns out concatenate mp3 data different sources should have same channels , same sample rate.

the solution decode mp3 files pcm , encode them same configuration using encode data read mic.


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