文件名称：ios 录音文件caf转mp3
文件大小：639KB
文件格式：ZIP
更新时间：2018-06-01 05:12:55
caf MP3 录音 ios
ios录音的caf文件转MP3文件，以兼容android 注意音频参数的设置，如果声音异常，请调整参数。 code： AVAudioSession *session = [AVAudioSession sharedInstance]; NSError *sessionError; [session setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError]; _sampleRate = 11025;//8000;//44100; _quality = AVAudioQualityLow; if(session == nil) NSLog(@"Error creating session: %@", [sessionError description]); else [session setActive:YES error:nil]; NSString *cafFilePath = strCaf; // NSString *mp3FileName = @"Mp3File"; // mp3FileName = [mp3FileName stringByAppendingString:@".mp3"]; NSString *mp3FilePath = strMP3Path;//[[NSHomeDirectory() stringByAppendingFormat:@"/Documents/"] stringByAppendingPathComponent:mp3FileName]; @try { int read, write; FILE *pcm = fopen([cafFilePath cStringUsingEncoding:1], "rb"); //source fseek(pcm, 4*1024, SEEK_CUR); //skip file header FILE *mp3 = fopen([mp3FilePath cStringUsingEncoding:1], "wb"); //output const int PCM_SIZE = 8192; const int MP3_SIZE = 8192; short int pcm_buffer[PCM_SIZE*2]; unsigned char mp3_buffer[MP3_SIZE]; lame_t lame = lame_init(); lame_set_in_samplerate(lame, _sampleRate); lame_set_VBR(lame, vbr_default); lame_init_params(lame); do { read = fread(pcm_buffer, 2*sizeof(short int), PCM_SIZE, pcm); if (read == 0) write = lame_encode_flush(lame, mp3_buffer, MP3_SIZE); else write = lame_encode_buffer_interleaved(lame, pcm_buffer, read, mp3_buffer, MP3_SIZE); fwrite(mp3_buffer, write, 1, mp3); } while (read != 0); lame_close(lame); fclose(mp3); fclose(pcm); } @catch (NSException *exception) { NSLog(@"%@",[exception description]); } @finally { }
【文件预览】：
libmp3lame.a
lame.h