2 * Copyright (c) 2003 Fabrice Bellard
3 * Copyright (c) 2007 Michael Niedermayer
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "libavutil/common.h"
28 #include "libavutil/mathematics.h"
30 #include "libavformat/avformat.h"
32 static char buffer[20];
34 static const char *ret_str(int v)
37 case AVERROR_EOF: return "-EOF";
38 case AVERROR(EIO): return "-EIO";
39 case AVERROR(ENOMEM): return "-ENOMEM";
40 case AVERROR(EINVAL): return "-EINVAL";
42 snprintf(buffer, sizeof(buffer), "%2d", v);
47 static void ts_str(char buffer[60], int64_t ts, AVRational base)
49 if (ts == AV_NOPTS_VALUE) {
50 strcpy(buffer, " NOPTS ");
53 ts= av_rescale_q(ts, base, (AVRational){1, 1000000});
54 snprintf(buffer, 60, "%c%"PRId64".%06"PRId64"", ts<0 ? '-' : ' ', FFABS(ts)/1000000, FFABS(ts)%1000000);
57 int main(int argc, char **argv)
60 AVFormatContext *ic = avformat_alloc_context();
61 int i, ret, stream_id;
64 AVDictionary *format_opts = NULL;
65 int64_t seekfirst = AV_NOPTS_VALUE;
70 ic->flags |= AVFMT_FLAG_KEEP_SIDE_DATA;
72 for(i=2; i<argc; i+=2){
73 if (!strcmp(argv[i], "-seekforw")){
74 seekfirst = atoi(argv[i+1]);
75 } else if(!strcmp(argv[i], "-seekback")){
76 seekfirst = atoi(argv[i+1]);
78 } else if(!strcmp(argv[i], "-frames")){
79 frame_count = atoi(argv[i+1]);
80 } else if(!strcmp(argv[i], "-duration")){
81 duration = atoi(argv[i+1]);
82 } else if(!strcmp(argv[i], "-fastseek")) {
83 if (atoi(argv[i+1])) {
84 ic->flags |= AVFMT_FLAG_FAST_SEEK;
86 } else if(argv[i][0] == '-' && argv[i+1]) {
87 av_dict_set(&format_opts, argv[i] + 1, argv[i+1], 0);
93 av_dict_set(&format_opts, "channels", "1", 0);
94 av_dict_set(&format_opts, "sample_rate", "22050", 0);
96 /* initialize libavcodec, and register all codecs and formats */
100 printf("usage: %s input_file\n"
107 ret = avformat_open_input(&ic, filename, NULL, &format_opts);
108 av_dict_free(&format_opts);
110 fprintf(stderr, "cannot open %s\n", filename);
114 ret = avformat_find_stream_info(ic, NULL);
116 fprintf(stderr, "%s: could not find codec parameters\n", filename);
120 if(seekfirst != AV_NOPTS_VALUE){
121 if(firstback) avformat_seek_file(ic, -1, INT64_MIN, seekfirst, seekfirst, 0);
122 else avformat_seek_file(ic, -1, seekfirst, seekfirst, INT64_MAX, 0);
125 AVPacket pkt = { 0 };
126 AVStream *av_uninit(st);
130 for(j=0; j<frame_count; j++) {
131 ret= av_read_frame(ic, &pkt);
134 st= ic->streams[pkt.stream_index];
135 ts_str(dts_buf, pkt.dts, st->time_base);
136 ts_str(ts_buf, pkt.pts, st->time_base);
137 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);
138 av_packet_unref(&pkt);
140 printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
147 stream_id= (i>>1)%(ic->nb_streams+1) - 1;
148 timestamp= (i*19362894167LL) % (duration*AV_TIME_BASE) - AV_TIME_BASE;
150 st= ic->streams[stream_id];
151 timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
153 //FIXME fully test the new seek API
154 if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
155 else ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
156 ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
157 printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
160 avformat_close_input(&ic);