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"
29 #include "libavformat/avformat.h"
31 static char buffer[20];
33 static const char *ret_str(int v)
36 case AVERROR_EOF: return "-EOF";
37 case AVERROR(EIO): return "-EIO";
38 case AVERROR(ENOMEM): return "-ENOMEM";
39 case AVERROR(EINVAL): return "-EINVAL";
41 snprintf(buffer, sizeof(buffer), "%2d", v);
46 static void ts_str(char buffer[60], int64_t ts, AVRational base)
48 if (ts == AV_NOPTS_VALUE) {
49 strcpy(buffer, " NOPTS ");
52 ts= av_rescale_q(ts, base, (AVRational){1, 1000000});
53 snprintf(buffer, 60, "%c%"PRId64".%06"PRId64"", ts<0 ? '-' : ' ', FFABS(ts)/1000000, FFABS(ts)%1000000);
56 int main(int argc, char **argv)
59 AVFormatContext *ic = NULL;
60 int i, ret, stream_id;
63 AVDictionary *format_opts = NULL;
64 int64_t seekfirst = AV_NOPTS_VALUE;
68 for(i=2; i<argc; i+=2){
69 if (!strcmp(argv[i], "-seekforw")){
70 seekfirst = atoi(argv[i+1]);
71 } else if(!strcmp(argv[i], "-seekback")){
72 seekfirst = atoi(argv[i+1]);
74 } else if(!strcmp(argv[i], "-frames")){
75 frame_count = atoi(argv[i+1]);
81 av_dict_set(&format_opts, "channels", "1", 0);
82 av_dict_set(&format_opts, "sample_rate", "22050", 0);
84 /* initialize libavcodec, and register all codecs and formats */
88 printf("usage: %s input_file\n"
95 ret = avformat_open_input(&ic, filename, NULL, &format_opts);
96 av_dict_free(&format_opts);
98 fprintf(stderr, "cannot open %s\n", filename);
102 ret = avformat_find_stream_info(ic, NULL);
104 fprintf(stderr, "%s: could not find codec parameters\n", filename);
108 if(seekfirst != AV_NOPTS_VALUE){
109 if(firstback) avformat_seek_file(ic, -1, INT64_MIN, seekfirst, seekfirst, 0);
110 else avformat_seek_file(ic, -1, seekfirst, seekfirst, INT64_MAX, 0);
113 AVPacket pkt = { 0 };
114 AVStream *av_uninit(st);
118 for(j=0; j<frame_count; j++) {
119 ret= av_read_frame(ic, &pkt);
122 st= ic->streams[pkt.stream_index];
123 ts_str(dts_buf, pkt.dts, st->time_base);
124 ts_str(ts_buf, pkt.pts, st->time_base);
125 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);
126 av_free_packet(&pkt);
128 printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
135 stream_id= (i>>1)%(ic->nb_streams+1) - 1;
136 timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;
138 st= ic->streams[stream_id];
139 timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
141 //FIXME fully test the new seek API
142 if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
143 else ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
144 ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
145 printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
148 avformat_close_input(&ic);