#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include <stdio.h>
#include "libavutil/avutil.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
main(int argc,char **argv)
{
const char *input_file_name="test.wav";
av_register_all();
AVFormatContext *ic;
ic=avformat_alloc_context();
if(av_open_input_file(&ic,input_file_name,NULL,FFM_PACKET_SIZE,NULL)!=0)
{
printf("can't open the file %s\n",input_file_name);
exit(1);
}
if(av_find_stream_info(ic)<0)
{
printf("can't find suitable codec parameters\n");
exit(1);
}
dump_format(ic,0,input_file_name,0);
int i;
int audioindex=-1;
for(i=0;i<ic->nb_streams;i++)
{
if(ic->streams[i]->codec->codec_type==CODEC_TYPE_AUDIO)
{
audioindex=i;
break;
}
}
if(audioindex==-1)
{
printf("can't find audio stream\n");
exit(1);
}
AVCodecContext *aCodecCtx;
aCodecCtx=ic->streams[audioindex]->codec;
AVCodec *aCodec;
aCodec=avcodec_find_decoder(aCodecCtx->codec_id);
if(aCodec==NULL)
{
printf("can't find suitable audio decoder\n");
exit(1);
}
if(avcodec_open(aCodecCtx,aCodec)<0)
{
printf("can't open the audio decoder\n");
exit(1);
}
const char *output_file_name="out.mp3";
AVOutputFormat *fmt;
AVFormatContext *oc;
AVCodecContext *oAcc;
AVCodec *oAc;
AVStream *audio_st;
fmt=guess_format(NULL,output_file_name,NULL);
if(!fmt)
{
printf("could not deduce output format from outfile extension\n");
exit(0);
}
oc=avformat_alloc_context();
if(!oc)
{
printf("Memory error\n");
exit(0);
}
oc->oformat=fmt;
strncpy(oc->filename,output_file_name,sizeof(oc->filename));
audio_st=av_new_stream(oc,oc->nb_streams);
if(!audio_st)
{
printf("could not alloc audio stream\n");
exit(0);
}
avcodec_get_context_defaults2(audio_st->codec,CODEC_TYPE_AUDIO);
oAcc=avcodec_alloc_context();
oAcc=audio_st->codec;
oAcc->codec_id=CODEC_ID_MP3;
oAcc->codec_type=CODEC_TYPE_AUDIO;
oAcc->bit_rate=aCodecCtx->bit_rate;
oAcc->sample_rate=aCodecCtx->sample_rate;
oAcc->channels=1;
oAcc->block_align=0;
if (av_set_parameters(oc, NULL) < 0)
{
printf( "Invalid output format parameters\n");
exit(0);
}
strcpy(oc->title,"music of c/c++");
strcpy(oc->author,"yzg");
strcpy(oc->copyright,"linux");
strcpy(oc->comment,"fedora");
strcpy(oc->album,"test");
oc->year=2011;
oc->track=1;
strcpy(oc->genre,"dota");
dump_format(oc,0,output_file_name,1);