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 { uint8_t *buf; ost->video_resample = 1; ost->video_crop = 0; // cropping is handled as part of resample buf = av_malloc((codec->width * codec->height * 3) / 2); if (!buf) goto fail; ost->pict_tmp.data[0] = buf; ost->pict_tmp.data[1] = ost->pict_tmp.data[0] + (codec->width * codec->height); ost->pict_tmp.data[2] = ost->pict_tmp.data[1] + (codec->width * codec->height) / 4; ost->pict_tmp.linesize[0] = codec->width; ost->pict_tmp.linesize[1] = codec->width / 2; ost->pict_tmp.linesize[2] = codec->width / 2; 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); } 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; ist->frame_decoded = 1; } } /* init pts */ for(i=0;i<nb_istreams;i++) { ist = ist_table[i]; is = input_files[ist->file_index]; ist->pts = 0; if (ist->decoding_needed) { switch (ist->st->codec.codec_type) { case CODEC_TYPE_AUDIO: av_frac_init(&ist->next_pts, 0, 0, is->pts_num * ist->st->codec.sample_rate); break; case CODEC_TYPE_VIDEO: av_frac_init(&ist->next_pts, 0, 0, is->pts_num * ist->st->codec.frame_rate); break; default: break; } } } /* 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; uint8_t *ptr; int len; uint8_t *data_buf; int data_size, got_picture; AVPicture picture; short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2]; void *buffer_to_free; 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 packet from it and output it in the fifo */ is = input_files[file_index]; if (av_read_packet(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_hex_dump) { printf("stream #%d, size=%d:\n", pkt.stream_index, pkt.size); av_hex_dump(pkt.data, pkt.size); } /* 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; // printf("read #%d.%d size=%d\n", ist->file_index, ist->index, pkt.size); len = pkt.size; ptr = pkt.data; while (len > 0) { /* decode the packet if needed */ data_buf = NULL; /* fail safe */ data_size = 0; if (ist->decoding_needed) { /* NOTE1: we only take into account the PTS if a new frame has begun (MPEG semantics) */ /* NOTE2: even if the fraction is not initialized, av_frac_set can be used to set the integer part */ if (ist->frame_decoded) { /* If pts is unavailable -- we have to use synthetic one */ if( pkt.pts != AV_NOPTS_VALUE ) { ist->pts = ist->next_pts.val = pkt.pts; } else { ist->pts = ist->next_pts.val; } ist->frame_decoded = 0; } switch(ist->st->codec.codec_type) { case CODEC_TYPE_AUDIO: /* XXX: could avoid copy if PCM 16 bits with same endianness as CPU */ ret = avcodec_decode_audio(&ist->st->codec, samples, &data_size, ptr, len); if (ret < 0) goto fail_decode; /* Some bug in mpeg audio decoder gives */ /* data_size < 0, it seems they are overflows */ if (data_size <= 0) { /* no audio frame */ ptr += ret; len -= ret; continue; } data_buf = (uint8_t *)samples; av_frac_add(&ist->next_pts, is->pts_den * data_size / (2 * ist->st->codec.channels)); break; case CODEC_TYPE_VIDEO: { AVFrame big_picture; data_size = (ist->st->codec.width * ist->st->codec.height * 3) / 2; ret = avcodec_decode_video(&ist->st->codec, &big_picture, &got_picture, ptr, len); picture= *(AVPicture*)&big_picture; ist->st->quality= big_picture.quality; if (ret < 0) { fail_decode: fprintf(stderr, "Error while decoding stream #%d.%d\n", ist->file_index, ist->index); av_free_packet(&pkt); goto redo; } if (!got_picture) { /* no picture yet */ ptr += ret; len -= ret; continue; } av_frac_add(&ist->next_pts, is->pts_den * ist->st->codec.frame_rate_base); } break; default: goto fail_decode; } } else { data_buf = ptr; data_size = len; ret = len; } ptr += ret; len -= ret; buffer_to_free = 0; if (ist->st->codec.codec_type == CODEC_TYPE_VIDEO) { pre_process_video_frame(ist, &picture, &buffer_to_free); } ist->frame_decoded = 1; /* frame rate emulation */ if (ist->st->codec.rate_emu) { int64_t pts = av_rescale((int64_t) ist->frame * ist->st->codec.frame_rate_base, 1000000, ist->st->codec.frame_rate); int64_t now = av_gettime() - ist->start; if (pts > now) usleep(pts - now); ist->frame++; } #if 0 /* mpeg PTS deordering : if it is a P or I frame, the PTS is the one of the next displayed one */ /* XXX: add mpeg4 too ? */ if (ist->st->codec.codec_id == CODEC_ID_MPEG1VIDEO) { if (ist->st->codec.pict_type != B_TYPE) { int64_t tmp; tmp = ist->last_ip_pts; ist->last_ip_pts = ist->frac_pts.val; ist->frac_pts.val = tmp; } } #endif /* transcode raw format, encode packets and output them */ for(i=0;i<nb_ostreams;i++) { int frame_size; ost = ost_table[i]; if (ost->source_index == ist_index) { os = output_files[ost->file_index]; #if 0 printf("%d: got pts=%f %f\n", i, pkt.pts / 90000.0, (ist->pts - ost->st->pts.val) / 90000.0); #endif /* set the input output pts pairs */ ost->sync_ipts = (double)ist->pts * is->pts_num / is->pts_den; /* XXX: take into account the various fifos, in particular for audio */ ost->sync_opts = ost->st->pts.val; //printf("ipts=%lld sync_ipts=%f sync_opts=%lld pts.val=%lld pkt.pts=%lld\n", ist->pts, ost->sync_ipts, ost->sync_opts, ost->st->pts.val, pkt.pts); if (ost->encoding_needed) { switch(ost->st->codec.codec_type) { case CODEC_TYPE_AUDIO: do_audio_out(os, ost, ist, data_buf, data_size); break; case CODEC_TYPE_VIDEO: /* find an audio stream for synchro */ { int i; AVOutputStream *audio_sync, *ost1; audio_sync = NULL; for(i=0;i<nb_ostreams;i++) { ost1 = ost_table[i]; if (ost1->file_index == ost->file_index && ost1->st->codec.codec_type == CODEC_TYPE_AUDIO) { audio_sync = ost1; break; } } do_video_out(os, ost, ist, &picture, &frame_size, audio_sync); if (do_vstats && frame_size) do_video_stats(os, ost, frame_size); } break; default: av_abort(); } } else { AVFrame avframe; /* no reencoding needed : output the packet directly */ /* force the input stream PTS */ memset(&avframe, 0, sizeof(AVFrame)); ost->st->codec.coded_frame= &avframe; avframe.key_frame = pkt.flags & PKT_FLAG_KEY; av_write_frame(os, ost->index, data_buf, data_size); ost->st->codec.frame_number++; ost->frame_number++; } } } av_free(buffer_to_free); } 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); } term_exit(); /* dump report by using the first video and audio streams */ print_report(output_files, ost_table, nb_ostreams, 1); /* 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); } } /* write the trailer if needed and close file */ for(i=0;i<nb_output_files;i++) { os = output_files[i]; av_write_trailer(os); } /* 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; }