duration = (frame_rate.num && frame_rate.den ? av_q2d((AVRational){frame_rate.den, frame_rate.num}) : 0);
pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
printf("****video  lee pts1:%lf            ,frame->pts:%llu           ,tb:(%d,/ %d)\n", pts,frame->pts,tb.num,tb.den);

af->pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
af->pos = frame->pkt_pos;
af->serial = is->auddec.pkt_serial;
af->duration = av_q2d((AVRational){frame->nb_samples, frame->sample_rate});
printf("****audio  lee pts1:%lf            ,frame->pts:%llu           \n", af->pts,frame->pts);
av_frame_move_ref(af->frame, frame);
frame_queue_push(&is->sampq);