/* * Copyright (c) 2003 Fabrice Bellard * Copyright (c) 2007 Michael Niedermayer * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <stdint.h> #include <stdlib.h> #include <stdio.h> #include <string.h> #include "libavutil/common.h" #include "libavutil/mathematics.h" #include "libavformat/avformat.h" static char buffer[20]; static const char *ret_str(int v) { switch (v) { case AVERROR_EOF: return "-EOF"; case AVERROR(EIO): return "-EIO"; case AVERROR(ENOMEM): return "-ENOMEM"; case AVERROR(EINVAL): return "-EINVAL"; default: snprintf(buffer, sizeof(buffer), "%2d", v); return buffer; } } static void ts_str(char buffer[60], int64_t ts, AVRational base) { if (ts == AV_NOPTS_VALUE) { strcpy(buffer, " NOPTS "); return; } ts= av_rescale_q(ts, base, (AVRational){1, 1000000}); snprintf(buffer, 60, "%c%"PRId64".%06"PRId64"", ts<0 ? '-' : ' ', FFABS(ts)/1000000, FFABS(ts)%1000000); } int main(int argc, char **argv) { const char *filename; AVFormatContext *ic = NULL; int i, ret, stream_id; int j; int64_t timestamp; AVDictionary *format_opts = NULL; int64_t seekfirst = AV_NOPTS_VALUE; int firstback=0; int frame_count = 1; int duration = 4; for(i=2; i<argc; i+=2){ if (!strcmp(argv[i], "-seekforw")){ seekfirst = atoi(argv[i+1]); } else if(!strcmp(argv[i], "-seekback")){ seekfirst = atoi(argv[i+1]); firstback = 1; } else if(!strcmp(argv[i], "-frames")){ frame_count = atoi(argv[i+1]); } else if(!strcmp(argv[i], "-duration")){ duration = atoi(argv[i+1]); } else { argc = 1; } } av_dict_set(&format_opts, "channels", "1", 0); av_dict_set(&format_opts, "sample_rate", "22050", 0); /* initialize libavcodec, and register all codecs and formats */ av_register_all(); if (argc < 2) { printf("usage: %s input_file\n" "\n", argv[0]); return 1; } filename = argv[1]; ret = avformat_open_input(&ic, filename, NULL, &format_opts); av_dict_free(&format_opts); if (ret < 0) { fprintf(stderr, "cannot open %s\n", filename); return 1; } ret = avformat_find_stream_info(ic, NULL); if (ret < 0) { fprintf(stderr, "%s: could not find codec parameters\n", filename); return 1; } if(seekfirst != AV_NOPTS_VALUE){ if(firstback) avformat_seek_file(ic, -1, INT64_MIN, seekfirst, seekfirst, 0); else avformat_seek_file(ic, -1, seekfirst, seekfirst, INT64_MAX, 0); } for(i=0; ; i++){ AVPacket pkt = { 0 }; AVStream *av_uninit(st); char ts_buf[60]; if(ret>=0){ for(j=0; j<frame_count; j++) { ret= av_read_frame(ic, &pkt); if(ret>=0){ char dts_buf[60]; st= ic->streams[pkt.stream_index]; ts_str(dts_buf, pkt.dts, st->time_base); ts_str(ts_buf, pkt.pts, st->time_base); printf("ret:%-10s st:%2d flags:%d dts:%s pts:%s pos:%7" PRId64 " size:%6d", ret_str(ret), pkt.stream_index, pkt.flags, dts_buf, ts_buf, pkt.pos, pkt.size); av_free_packet(&pkt); } else printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace printf("\n"); } } if(i>25) break; stream_id= (i>>1)%(ic->nb_streams+1) - 1; timestamp= (i*19362894167LL) % (duration*AV_TIME_BASE) - AV_TIME_BASE; if(stream_id>=0){ st= ic->streams[stream_id]; timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base); } //FIXME fully test the new seek API if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0); else ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0); ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base); printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf); } avformat_close_input(&ic); return 0; }