音频速度改变我创建了一个WAV
(PCM
)至MP3
转换器。但是输出太快了。上转换WAV到MP3
这是代码,其将所述编码。
FILE *pcm = fopen(in_path, "rb");
FILE *mp3 = fopen(out_path, "wb");
int read, write;
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_brate(lame, byteRate);
lame_set_num_channels(lame, channels);
lame_set_mode(lame, MONO);
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);
参数sampleRate
,byteRate
和channels
从WAV头读取。
我相信的东西是在代码所缺少....
谢谢!我发现你的代码,并改变everthing使其工作!我以为设定MONO会做作品。但是现在我意识到将一个缓冲区设置为NULL会解决它! – Victor
谢谢!!!!!你解决我的问题 –