static int av_encode(AVFormatContext **output_files, int nb_output_files, AVFormatContext **input_files, int nb_input_files, AVStreamMap *stream_maps, int nb_stream_maps) { int ret, i, j, k, n, nb_istreams = 0, nb_ostreams = 0; AVFormatContext *is, *os; AVCodecContext *codec, *icodec; AVOutputStream *ost, **ost_table = NULL; AVInputStream *ist, **ist_table = NULL; AVInputFile *file_table; AVFormatContext *stream_no_data; int key; file_table= (AVInputFile*) av_mallocz(nb_input_files * sizeof(AVInputFile)); if (!file_table) goto fail; /* input stream init */ j = 0; for(i=0;i<nb_input_files;i++) { is = input_files[i]; file_table[i].ist_index = j; file_table[i].nb_streams = is->nb_streams; j += is->nb_streams; } nb_istreams = j; ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *)); if (!ist_table) goto fail; for(i=0;i<nb_istreams;i++) { ist = av_mallocz(sizeof(AVInputStream)); if (!ist) goto fail; ist_table[i] = ist; } j = 0; for(i=0;i<nb_input_files;i++) { is = input_files[i]; for(k=0;k<is->nb_streams;k++) { ist = ist_table[j++]; ist->st = is->streams[k]; ist->file_index = i; ist->index = k; ist->discard = 1; /* the stream is discarded by default (changed later) */ if (ist->st->codec.rate_emu) { ist->start = av_gettime(); ist->frame = 0; } } } /* output stream init */ nb_ostreams = 0; for(i=0;i<nb_output_files;i++) { os = output_files[i]; nb_ostreams += os->nb_streams; } if (nb_stream_maps > 0 && nb_stream_maps != nb_ostreams) { fprintf(stderr, "Number of stream maps must match number of output streams\n"); exit(1); } /* Sanity check the mapping args -- do the input files & streams exist? */ for(i=0;i<nb_stream_maps;i++) { int fi = stream_maps[i].file_index; int si = stream_maps[i].stream_index; if (fi < 0 || fi > nb_input_files - 1 || si < 0 || si > file_table[fi].nb_streams - 1) { fprintf(stderr,"Could not find input stream #%d.%d\n", fi, si); exit(1); } } ost_table = av_mallocz(sizeof(AVOutputStream *) * nb_ostreams); if (!ost_table) goto fail; for(i=0;i<nb_ostreams;i++) { ost = av_mallocz(sizeof(AVOutputStream)); if (!ost) goto fail; ost_table[i] = ost; } n = 0; for(k=0;k<nb_output_files;k++) { os = output_files[k]; for(i=0;i<os->nb_streams;i++) { int found; ost = ost_table[n++]; ost->file_index = k; ost->index = i; ost->st = os->streams[i]; if (nb_stream_maps > 0) { ost->source_index = file_table[stream_maps[n-1].file_index].ist_index + stream_maps[n-1].stream_index; /* Sanity check that the stream types match */ if (ist_table[ost->source_index]->st->codec.codec_type != ost->st->codec.codec_type) { fprintf(stderr, "Codec type mismatch for mapping #%d.%d -> #%d.%d\n", stream_maps[n-1].file_index, stream_maps[n-1].stream_index, ost->file_index, ost->index); exit(1); } } else { /* get corresponding input stream index : we select the first one with the right type */ found = 0; for(j=0;j<nb_istreams;j++) { ist = ist_table[j]; if (ist->discard && ist->st->codec.codec_type == ost->st->codec.codec_type) { ost->source_index = j; found = 1; } } if (!found) { /* try again and reuse existing stream */ for(j=0;j<nb_istreams;j++) { ist = ist_table[j]; if (ist->st->codec.codec_type == ost->st->codec.codec_type) { ost->source_index = j; found = 1; } } if (!found) { fprintf(stderr, "Could not find input stream matching output stream #%d.%d\n", ost->file_index, ost->index); exit(1); } } } ist = ist_table[ost->source_index]; ist->discard = 0; } } /* for each output stream, we compute the right encoding parameters */ for(i=0;i<nb_ostreams;i++) { ost = ost_table[i]; ist = ist_table[ost->source_index]; codec = &ost->st->codec; icodec = &ist->st->codec; if (ost->st->stream_copy) { /* if stream_copy is selected, no need to decode or encode */ codec->codec_id = icodec->codec_id; codec->codec_type = icodec->codec_type; codec->codec_tag = icodec->codec_tag; codec->bit_rate = icodec->bit_rate; switch(codec->codec_type) { case CODEC_TYPE_AUDIO: codec->sample_rate = icodec->sample_rate; codec->channels = icodec->channels; break; case CODEC_TYPE_VIDEO: codec->frame_rate = icodec->frame_rate; codec->frame_rate_base = icodec->frame_rate_base; codec->width = icodec->width; codec->height = icodec->height; break; default: av_abort(); } } else { switch(codec->codec_type) { case CODEC_TYPE_AUDIO: if (fifo_init(&ost->fifo, 2 * MAX_AUDIO_PACKET_SIZE)) goto fail; if (codec->channels == icodec->channels && codec->sample_rate == icodec->sample_rate) { ost->audio_resample = 0; } else { if (codec->channels != icodec->channels && icodec->codec_id == CODEC_ID_AC3) { /* Special case for 5:1 AC3 input */ /* and mono or stereo output */ /* Request specific number of channels */ icodec->channels = codec->channels; if (codec->sample_rate == icodec->sample_rate) ost->audio_resample = 0; else { ost->audio_resample = 1; ost->resample = audio_resample_init(codec->channels, icodec->channels, codec->sample_rate, icodec->sample_rate); if(!ost->resample) { printf("Can't resample. Aborting.\n"); av_abort(); } } /* Request specific number of channels */ icodec->channels = codec->channels; } else { ost->audio_resample = 1; ost->resample = audio_resample_init(codec->channels, icodec->channels, codec->sample_rate, icodec->sample_rate); if(!ost->resample) { printf("Can't resample. Aborting.\n"); av_abort(); } } } ist->decoding_needed = 1; ost->encoding_needed = 1; break; case CODEC_TYPE_VIDEO: if (codec->width == icodec->width && codec->height == icodec->height && frame_topBand == 0 && frame_bottomBand == 0 && frame_leftBand == 0 && frame_rightBand == 0) { ost->video_resample = 0; ost->video_crop = 0; } else if ((codec->width == icodec->width - (frame_leftBand + frame_rightBand)) && (codec->height == icodec->height - (frame_topBand + frame_bottomBand))) { ost->video_resample = 0; ost->video_crop = 1; ost->topBand = frame_topBand; ost->leftBand = frame_leftBand; } else { ost->video_resample = 1; ost->video_crop = 0; // cropping is handled as part of resample if( avpicture_alloc( &ost->pict_tmp, PIX_FMT_YUV420P, codec->width, codec->height ) ) goto fail; ost->img_resample_ctx = img_resample_full_init( ost->st->codec.width, ost->st->codec.height, ist->st->codec.width, ist->st->codec.height, frame_topBand, frame_bottomBand, frame_leftBand, frame_rightBand); } ost->encoding_needed = 1; ist->decoding_needed = 1; break; default: av_abort(); } /* two pass mode */ if (ost->encoding_needed && (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) { char logfilename[1024]; FILE *f; int size; char *logbuffer; snprintf(logfilename, sizeof(logfilename), "%s-%d.log", pass_logfilename ? pass_logfilename : DEFAULT_PASS_LOGFILENAME, i); if (codec->flags & CODEC_FLAG_PASS1) { f = fopen(logfilename, "w"); if (!f) { perror(logfilename); exit(1); } ost->logfile = f; } else { /* read the log file */ f = fopen(logfilename, "r"); if (!f) { perror(logfilename); exit(1); } fseek(f, 0, SEEK_END); size = ftell(f); fseek(f, 0, SEEK_SET); logbuffer = av_malloc(size + 1); if (!logbuffer) { fprintf(stderr, "Could not allocate log buffer\n"); exit(1); } size = fread(logbuffer, 1, size, f); fclose(f); logbuffer[size] = '\0'; codec->stats_in = logbuffer; } } } } /* dump the file output parameters - cannot be done before in case of stream copy */ for(i=0;i<nb_output_files;i++) { dump_format(output_files[i], i, output_files[i]->filename, 1); } /* dump the stream mapping */ fprintf(stderr, "Stream mapping:\n"); for(i=0;i<nb_ostreams;i++) { ost = ost_table[i]; fprintf(stderr, " Stream #%d.%d -> #%d.%d\n", ist_table[ost->source_index]->file_index, ist_table[ost->source_index]->index, ost->file_index, ost->index); } /* open each encoder */ for(i=0;i<nb_ostreams;i++) { ost = ost_table[i]; if (ost->encoding_needed) { AVCodec *codec; codec = avcodec_find_encoder(ost->st->codec.codec_id); if (!codec) { fprintf(stderr, "Unsupported codec for output stream #%d.%d\n", ost->file_index, ost->index); exit(1); } if (avcodec_open(&ost->st->codec, codec) < 0) { fprintf(stderr, "Error while opening codec for stream #%d.%d - maybe incorrect parameters such as bit_rate, rate, width or height\n", ost->file_index, ost->index); exit(1); } } } /* open each decoder */ for(i=0;i<nb_istreams;i++) { ist = ist_table[i]; if (ist->decoding_needed) { AVCodec *codec; codec = avcodec_find_decoder(ist->st->codec.codec_id); if (!codec) { fprintf(stderr, "Unsupported codec (id=%d) for input stream #%d.%d\n", ist->st->codec.codec_id, ist->file_index, ist->index); exit(1); } if (avcodec_open(&ist->st->codec, codec) < 0) { fprintf(stderr, "Error while opening codec for input stream #%d.%d\n", ist->file_index, ist->index); exit(1); } //if (ist->st->codec.codec_type == CODEC_TYPE_VIDEO) // ist->st->codec.flags |= CODEC_FLAG_REPEAT_FIELD; } } /* init pts */ for(i=0;i<nb_istreams;i++) { ist = ist_table[i]; is = input_files[ist->file_index]; ist->pts = 0; ist->next_pts = 0; } /* compute buffer size max (should use a complete heuristic) */ for(i=0;i<nb_input_files;i++) { file_table[i].buffer_size_max = 2048; } /* open files and write file headers */ for(i=0;i<nb_output_files;i++) { os = output_files[i]; if (av_write_header(os) < 0) { fprintf(stderr, "Could not write header for output file #%d (incorrect codec paramters ?)\n", i); ret = -EINVAL; goto fail; } } #ifndef CONFIG_WIN32 if ( !using_stdin ) fprintf(stderr, "Press [q] to stop encoding\n"); #endif term_init(); stream_no_data = 0; key = -1; for(; received_sigterm == 0;) { int file_index, ist_index; AVPacket pkt; double pts_min; redo: /* if 'q' pressed, exits */ if (!using_stdin) { /* read_key() returns 0 on EOF */ key = read_key(); if (key == 'q') break; } /* select the stream that we must read now by looking at the smallest output pts */ file_index = -1; pts_min = 1e10; for(i=0;i<nb_ostreams;i++) { double pts; ost = ost_table[i]; os = output_files[ost->file_index]; ist = ist_table[ost->source_index]; pts = (double)ost->st->pts.val * os->pts_num / os->pts_den; if (!file_table[ist->file_index].eof_reached && pts < pts_min) { pts_min = pts; file_index = ist->file_index; } } /* if none, if is finished */ if (file_index < 0) { break; } /* finish if recording time exhausted */ if (recording_time > 0 && pts_min >= (recording_time / 1000000.0)) break; /* read a frame from it and output it in the fifo */ is = input_files[file_index]; if (av_read_frame(is, &pkt) < 0) { file_table[file_index].eof_reached = 1; continue; } if (!pkt.size) { stream_no_data = is; } else { stream_no_data = 0; } if (do_pkt_dump) { av_pkt_dump(stdout, &pkt, do_hex_dump); } /* the following test is needed in case new streams appear dynamically in stream : we ignore them */ if (pkt.stream_index >= file_table[file_index].nb_streams) goto discard_packet; ist_index = file_table[file_index].ist_index + pkt.stream_index; ist = ist_table[ist_index]; if (ist->discard) goto discard_packet; //fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->index, pkt.size); if (output_packet(ist, ist_index, ost_table, nb_ostreams, &pkt) < 0) { fprintf(stderr, "Error while decoding stream #%d.%d\n", ist->file_index, ist->index); av_free_packet(&pkt); goto redo; } discard_packet: av_free_packet(&pkt); /* dump report by using the output first video and audio streams */ print_report(output_files, ost_table, nb_ostreams, 0); } /* at the end of stream, we must flush the decoder buffers */ for(i=0;i<nb_istreams;i++) { ist = ist_table[i]; if (ist->decoding_needed) { output_packet(ist, i, ost_table, nb_ostreams, NULL); } } term_exit(); /* dump report by using the first video and audio streams */ print_report(output_files, ost_table, nb_ostreams, 1); /* write the trailer if needed and close file */ for(i=0;i<nb_output_files;i++) { os = output_files[i]; av_write_trailer(os); } /* close each encoder */ for(i=0;i<nb_ostreams;i++) { ost = ost_table[i]; if (ost->encoding_needed) { av_freep(&ost->st->codec.stats_in); avcodec_close(&ost->st->codec); } } /* close each decoder */ for(i=0;i<nb_istreams;i++) { ist = ist_table[i]; if (ist->decoding_needed) { avcodec_close(&ist->st->codec); } } /* finished ! */ ret = 0; fail1: av_free(file_table); if (ist_table) { for(i=0;i<nb_istreams;i++) { ist = ist_table[i]; av_free(ist); } av_free(ist_table); } if (ost_table) { for(i=0;i<nb_ostreams;i++) { ost = ost_table[i]; if (ost) { if (ost->logfile) { fclose(ost->logfile); ost->logfile = NULL; } fifo_free(&ost->fifo); /* works even if fifo is not initialized but set to zero */ av_free(ost->pict_tmp.data[0]); if (ost->video_resample) img_resample_close(ost->img_resample_ctx); if (ost->audio_resample) audio_resample_close(ost->resample); av_free(ost); } } av_free(ost_table); } return ret; fail: ret = -ENOMEM; goto fail1; }