static int process_input(void) { InputFile *ifile; AVFormatContext *is; InputStream *ist; AVPacket pkt; int ret, i, j; int file_index; /* select the stream that we must read now */ file_index = select_input_file(); /* if none, if is finished */ if (file_index == -2) { poll_filters() ; return AVERROR(EAGAIN); } if (file_index < 0) { if (got_eagain()) { reset_eagain(); av_usleep(10000); return AVERROR(EAGAIN); } av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n"); return AVERROR_EOF; } ifile = input_files[file_index]; is = ifile->ctx; ret = get_input_packet(ifile, &pkt); if (ret == AVERROR(EAGAIN)) { ifile->eagain = 1; return ret; } if (ret < 0) { if (ret != AVERROR_EOF) { print_error(is->filename, ret); if (exit_on_error) exit_program(1); } ifile->eof_reached = 1; for (i = 0; i < ifile->nb_streams; i++) { ist = input_streams[ifile->ist_index + i]; if (ist->decoding_needed) output_packet(ist, NULL); poll_filters(); } if (opt_shortest) return AVERROR_EOF; else return AVERROR(EAGAIN); } reset_eagain(); if (do_pkt_dump) { av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump, is->streams[pkt.stream_index]); } /* the following test is needed in case new streams appear dynamically in stream : we ignore them */ if (pkt.stream_index >= ifile->nb_streams) { report_new_stream(file_index, &pkt); goto discard_packet; } ist = input_streams[ifile->ist_index + pkt.stream_index]; if (ist->discard) goto discard_packet; if(!ist->wrap_correction_done && input_files[file_index]->ctx->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){ uint64_t stime = av_rescale_q(input_files[file_index]->ctx->start_time, AV_TIME_BASE_Q, ist->st->time_base); uint64_t stime2= stime + (1LL<<ist->st->pts_wrap_bits); ist->wrap_correction_done = 1; if(pkt.dts != AV_NOPTS_VALUE && pkt.dts > stime && pkt.dts - stime > stime2 - pkt.dts) { pkt.dts -= 1LL<<ist->st->pts_wrap_bits; ist->wrap_correction_done = 0; } if(pkt.pts != AV_NOPTS_VALUE && pkt.pts > stime && pkt.pts - stime > stime2 - pkt.pts) { pkt.pts -= 1LL<<ist->st->pts_wrap_bits; ist->wrap_correction_done = 0; } } if (pkt.dts != AV_NOPTS_VALUE) pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base); if (pkt.pts != AV_NOPTS_VALUE) pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base); if (pkt.pts != AV_NOPTS_VALUE) pkt.pts *= ist->ts_scale; if (pkt.dts != AV_NOPTS_VALUE) pkt.dts *= ist->ts_scale; if (debug_ts) { av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s " "next_dts:%s next_dts_time:%s next_pts:%s next_pts_time:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%"PRId64"\n", ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type), av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q), av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q), av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base), av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base), input_files[ist->file_index]->ts_offset); } if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE && !copy_ts) { int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q); int64_t delta = pkt_dts - ist->next_dts; if (is->iformat->flags & AVFMT_TS_DISCONT) { if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE || (delta > 1LL*dts_delta_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) || pkt_dts+1<ist->pts){ ifile->ts_offset -= delta; av_log(NULL, AV_LOG_DEBUG, "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n", delta, ifile->ts_offset); pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base); if (pkt.pts != AV_NOPTS_VALUE) pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base); } } else { if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE || (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) || pkt_dts+1<ist->pts){ av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index); pkt.dts = AV_NOPTS_VALUE; } if (pkt.pts != AV_NOPTS_VALUE){ int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q); delta = pkt_pts - ist->next_dts; if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE || (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) || pkt_pts+1<ist->pts) { av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index); pkt.pts = AV_NOPTS_VALUE; } } } } sub2video_heartbeat(ist, pkt.pts); if ((ret = output_packet(ist, &pkt)) < 0 || ((ret = poll_filters()) < 0 && ret != AVERROR_EOF)) { char buf[128]; av_strerror(ret, buf, sizeof(buf)); av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n", ist->file_index, ist->st->index, buf); if (exit_on_error) exit_program(1); av_free_packet(&pkt); return AVERROR(EAGAIN); } discard_packet: av_free_packet(&pkt); return 0; }