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#define USE_H264BSF 1
#define USE_AACBSF 1
#define CODEC_FLAG_GLOBAL_HEADER (1 << 22)
static int open_input_file(const char *filename)
{
FILE *fp;
fp=fopen(filename,"rb");// localfile文件名
if(fp==NULL)return 0;
fseek(fp,0L,SEEK_END); /* 定位到文件末尾 */
int flen=ftell(fp); /* 得到文件大小 */
//printf("=====22222======filename %s,length:%d",filename,flen);
return flen;
}
int muxer_main(char *inputH264FileName,char *inputAacFileName,char *outMP4FileName,char* angle)
{
AVOutputFormat *ofmt = NULL;
//Input AVFormatContext and Output AVFormatContext
AVFormatContext *ifmt_ctx_v = NULL, *ifmt_ctx_a = NULL,*ofmt_ctx = NULL;
AVPacket pkt;
AVCodec *dec;
int ret, i;
int videoindex_v=-1,videoindex_out=-1;
int audioindex_a=-1,audioindex_out=-1;
int frame_index=0;
int64_t cur_pts_v=0,cur_pts_a=0;
//const char *in_filename_v = "cuc_ieschool.ts";//Input file URL
const char *in_filename_v =inputH264FileName;
//const char *in_filename_a = "cuc_ieschool.mp3";
//const char *in_filename_a = "gowest.m4a";
//const char *in_filename_a = "gowest.aac";
const char *in_filename_a =inputAacFileName;
const char *out_filename =outMP4FileName;//Output file URL
printf("==========in h264==filename:%s\n",in_filename_v);
printf("==========in aac ===filename:%s\n",in_filename_a);
int video_length=open_input_file(in_filename_v);
//=========判断如果视频中没有音频，会导致avformat_find_stream_info退出程序======
int acc_length=0;//open_input_file(in_filename_a); //如果音频是空，则不需要放入视频
avcodec_register_all();
av_register_all();
///* //Input
if ((ret = avformat_open_input(&ifmt_ctx_a, in_filename_v, NULL, NULL)) < 0) {
// printf("=====11========RET:%d\n",ret);
printf( "Could not open input file.");
goto end;
}
// printf("=====2========RET:%d\n",ret);
if ((ret = avformat_find_stream_info(ifmt_ctx_a, 0)) < 0) {
printf( "Failed to retrieve input stream information");
if(acc_length>0) //如果音频是空，则直接到结尾，否则继续运行
goto end;
}
if ((ret = avformat_open_input(&ifmt_ctx_v, in_filename_v, NULL, NULL)) < 0) {
printf( "Could not open input file:%d\n",ret);
goto end;
}
// printf("=====0========RET:%d\n",ret);
if ((ret = avformat_find_stream_info(ifmt_ctx_v, 0)) < 0) {
printf( "Failed to retrieve input stream information");
goto end;
}
// /* init the video decoder */
// if ((ret = avcodec_open2(ifmt_ctx_a->, dec, NULL)) < 0) {
// printf( "Cannot open video decoder\n");
// return ret;
// }
//
printf("===========Input Information==========\n");
av_dump_format(ifmt_ctx_v, 0, in_filename_v, 0);
av_dump_format(ifmt_ctx_a, 0, in_filename_a, 0);
printf("======================================\n");
//Output
avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, out_filename);
if (!ofmt_ctx) {
printf( "Could not create output context\n");
ret = AVERROR_UNKNOWN;
goto end;
}
ofmt = ofmt_ctx->oformat;
for (i = 0; i < ifmt_ctx_v->nb_streams; i++) {
//Create output AVStream according to input AVStream
if(ifmt_ctx_v->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO){
AVStream *in_stream = ifmt_ctx_v->streams[i];
AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec);
videoindex_v=i;
if (!out_stream) {
printf( "Failed allocating output stream\n");
ret = AVERROR_UNKNOWN;
goto end;
}
videoindex_out=out_stream->index;
//Copy the settings of AVCodecContext
ret = av_dict_set(&out_stream->metadata,"rotate",angle,0); //设置旋转角度
if(ret>=0)
{
printf("=========yes=====set rotate success!===:%s\n",angle);
}
if (avcodec_copy_context(out_stream->codec, in_stream->codec) < 0) {
printf( "Failed to copy context from input to output stream codec context\n");
goto end;
}
out_stream->codec->codec_tag = 0;
if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
break;
}
}
if(acc_length>0) //如果音频文件有内容，则读取，否则为空读取会失败
{
for (i = 0; i < ifmt_ctx_a->nb_streams; i++) {
printf("===========acc=====from======:%d\n",ifmt_ctx_a->nb_streams);
//Create output AVStream according to input AVStream
if(ifmt_ctx_a->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO){
AVStream *in_stream = ifmt_ctx_a->streams[i];
AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec);
audioindex_a=i;
if (!out_stream) {
printf( "Failed allocating output stream\n");
ret = AVERROR_UNKNOWN;
goto end;
}
audioindex_out=out_stream->index;
//Copy the settings of AVCodecContext
if (avcodec_copy_context(out_stream->codec, in_stream->codec) < 0) {
printf( "Failed to copy context from input to output stream codec context\n");
goto end;
}
out_stream->codec->codec_tag = 0;
if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
break;
}
}
}
printf("==========Output Information==========\n");
av_dump_format(ofmt_ctx, 0, out_filename, 1);
printf("======================================\n");
//Open output file
if (!(ofmt->flags & AVFMT_NOFILE)) {
if (avio_open(&ofmt_ctx->pb, out_filename, AVIO_FLAG_WRITE) < 0) {
printf( "Could not open output file '%s'", out_filename);
goto end;
}
}
//Write file header
int header_ret=avformat_write_header(ofmt_ctx, NULL);
if (header_ret< 0) {
printf( "Error occurred when opening output file:%d\n",header_ret);
goto end;
}
//FIX
#if USE_H264BSF
AVBitStreamFilterContext* h264bsfc = av_bitstream_filter_init("h264_mp4toannexb");
#endif
#if USE_AACBSF
AVBitStreamFilterContext* aacbsfc = av_bitstream_filter_init("aac_adtstoasc");
#endif
while (1) {
AVFormatContext *ifmt_ctx;
int stream_index=0;
AVStream *in_stream, *out_stream;
//Get an AVPacket
int compare_tag=-1;
if(acc_length>0) //既然没有音频，则直接判断写入视频
{
compare_tag =av_compare_ts(cur_pts_v,ifmt_ctx_v->streams[videoindex_v]->time_base,cur_pts_a,ifmt_ctx_a->streams[audioindex_a]->time_base) ;
}
if(compare_tag<= 0)
{
ifmt_ctx=ifmt_ctx_v;
stream_index=videoindex_out;
if(av_read_frame(ifmt_ctx, &pkt) >= 0){
do{
in_stream = ifmt_ctx->streams[pkt.stream_index];
out_stream = ofmt_ctx->streams[stream_index];
if(pkt.stream_index==videoindex_v){
//FIX￡∫No PTS (Example: Raw H.264)
//Simple Write PTS
if(pkt.pts==AV_NOPTS_VALUE){
//Write PTS
AVRational time_base1=in_stream->time_base;
//Duration between 2 frames (us)
int64_t calc_duration=(double)AV_TIME_BASE/av_q2d(in_stream->r_frame_rate);
//Parameters
pkt.pts=(double)(frame_index*calc_duration)/(double)(av_q2d(time_base1)*AV_TIME_BASE);
pkt.dts=pkt.pts;
pkt.duration=(double)calc_duration/(double)(av_q2d(time_base1)*AV_TIME_BASE);
frame_index++;
}
cur_pts_v=pkt.pts;
break;
}
}while(av_read_frame(ifmt_ctx, &pkt) >= 0);
}else{
break;
}
}else{
ifmt_ctx=ifmt_ctx_a;
stream_index=audioindex_out;
if(av_read_frame(ifmt_ctx, &pkt) >= 0){
do{
in_stream = ifmt_ctx->streams[pkt.stream_index];
out_stream = ofmt_ctx->streams[stream_index];
if(pkt.stream_index==audioindex_a){
//FIX￡∫No PTS
//Simple Write PTS
if(pkt.pts==AV_NOPTS_VALUE){
//Write PTS
AVRational time_base1=in_stream->time_base;
//Duration between 2 frames (us)
int64_t calc_duration=(double)AV_TIME_BASE/av_q2d(in_stream->r_frame_rate);
//Parameters
pkt.pts=(double)(frame_index*calc_duration)/(double)(av_q2d(time_base1)*AV_TIME_BASE);
pkt.dts=pkt.pts;
pkt.duration=(double)calc_duration/(double)(av_q2d(time_base1)*AV_TIME_BASE);
frame_index++;
}
cur_pts_a=pkt.pts;
break;
}
}while(av_read_frame(ifmt_ctx, &pkt) >= 0);
}else{
break;
}
}
//FIX:Bitstream Filter
#if USE_H264BSF
av_bitstream_filter_filter(h264bsfc, in_stream->codec, NULL, &pkt.data, &pkt.size, pkt.data, pkt.size, 0);
#endif
#if USE_AACBSF
av_bitstream_filter_filter(aacbsfc, out_stream->codec, NULL, &pkt.data, &pkt.size, pkt.data, pkt.size, 0);
#endif
//Convert PTS/DTS
pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, (AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, (AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base);
pkt.pos = -1;
pkt.stream_index=stream_index;
printf("Write 1 Packet. size:%5d\tpts:%lld\n",pkt.size,pkt.pts);
//Write
if (av_interleaved_write_frame(ofmt_ctx, &pkt) < 0) {
printf( "Error muxing packet\n");
break;
}
av_free_packet(&pkt);
}
//Write file trailer
av_write_trailer(ofmt_ctx);
#if USE_H264BSF
av_bitstream_filter_close(h264bsfc);
#endif
#if USE_AACBSF
av_bitstream_filter_close(aacbsfc);
#endif
end:
avformat_close_input(&ifmt_ctx_v);
avformat_close_input(&ifmt_ctx_a);
/* close output */
if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE))
avio_close(ofmt_ctx->pb);
avformat_free_context(ofmt_ctx);
if (ret < 0 && ret != AVERROR_EOF) {
printf( "Error occurred.\n");
return -1;
}
printf("======muxer mp4 success =====!\n");
return 0;
}