static int output_packet(InputStream *ist, OutputStream *ost_table, int nb_ostreams, const AVPacket *pkt) { int ret = 0, i; int got_output; int64_t pkt_pts = AV_NOPTS_VALUE; AVPacket avpkt; if (ist->next_dts == AV_NOPTS_VALUE) ist->next_dts = ist->dts; if (ist->next_pts == AV_NOPTS_VALUE) ist->next_pts = ist->pts; if (pkt == NULL) { /* EOF handling */ av_init_packet(&avpkt); avpkt.data = NULL; avpkt.size = 0; goto handle_eof; } else { avpkt = *pkt; } if (pkt->dts != AV_NOPTS_VALUE) { ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q); if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed) ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q); } if(pkt->pts != AV_NOPTS_VALUE) pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q); // while we have more to decode or while the decoder did output something on EOF while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) { int duration; handle_eof: ist->pts = ist->next_pts; ist->dts = ist->next_dts; if (avpkt.size && avpkt.size != pkt->size) { av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING, "Multiple frames in a packet from stream %d\n", pkt->stream_index); ist->showed_multi_packet_warning = 1; } switch (ist->st->codec->codec_type) { case AVMEDIA_TYPE_AUDIO: ret = transcode_audio (ist, &avpkt, &got_output); break; case AVMEDIA_TYPE_VIDEO: ret = transcode_video (ist, &avpkt, &got_output, &pkt_pts); if (avpkt.duration) { duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q); } else if(ist->st->codec->time_base.num != 0) { int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame; duration = ((int64_t)AV_TIME_BASE * ist->st->codec->time_base.num * ticks) / ist->st->codec->time_base.den; } else duration = 0; if(ist->dts != AV_NOPTS_VALUE && duration) { ist->next_dts += duration; }else ist->next_dts = AV_NOPTS_VALUE; if (got_output) ist->next_pts += duration; //FIXME the duration is not correct in some cases break; case AVMEDIA_TYPE_SUBTITLE: ret = transcode_subtitles(ist, &avpkt, &got_output); break; default: return -1; } if (ret < 0) return ret; avpkt.dts= avpkt.pts= AV_NOPTS_VALUE; // touch data and size only if not EOF if (pkt) { if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO) ret = avpkt.size; avpkt.data += ret; avpkt.size -= ret; } if (!got_output) { continue; } } /* handle stream copy */ if (!ist->decoding_needed) { rate_emu_sleep(ist); ist->dts = ist->next_dts; switch (ist->st->codec->codec_type) { case AVMEDIA_TYPE_AUDIO: ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) / ist->st->codec->sample_rate; break; case AVMEDIA_TYPE_VIDEO: if (pkt->duration) { ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q); } else if(ist->st->codec->time_base.num != 0) { int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame; ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->time_base.num * ticks) / ist->st->codec->time_base.den; } break; } ist->pts = ist->dts; ist->next_pts = ist->next_dts; } for (i = 0; pkt && i < nb_ostreams; i++) { OutputStream *ost = &ost_table[i]; if (!check_output_constraints(ist, ost) || ost->encoding_needed) continue; do_streamcopy(ist, ost, pkt); } return 0; }