mirror of https://git.ffmpeg.org/ffmpeg.git
131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
/*
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* Copyright (c) 2003 Fabrice Bellard
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* Copyright (c) 2007 Michael Niedermayer
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "libavutil/common.h"
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#include "libavutil/mathematics.h"
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#include "libavformat/avformat.h"
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static char buffer[20];
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static const char *ret_str(int v)
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{
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switch (v) {
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case AVERROR_EOF: return "-EOF";
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case AVERROR(EIO): return "-EIO";
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case AVERROR(ENOMEM): return "-ENOMEM";
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case AVERROR(EINVAL): return "-EINVAL";
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default:
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snprintf(buffer, sizeof(buffer), "%2d", v);
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return buffer;
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}
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}
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static void ts_str(char buffer[60], int64_t ts, AVRational base)
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{
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double tsval;
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if (ts == AV_NOPTS_VALUE) {
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strcpy(buffer, " NOPTS ");
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return;
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}
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tsval = ts * av_q2d(base);
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snprintf(buffer, 60, "%9f", tsval);
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}
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int main(int argc, char **argv)
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{
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const char *filename;
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AVFormatContext *ic = NULL;
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int i, ret, stream_id;
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int64_t timestamp;
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AVDictionary *format_opts = NULL;
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av_dict_set(&format_opts, "channels", "1", 0);
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av_dict_set(&format_opts, "sample_rate", "22050", 0);
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/* initialize libavcodec, and register all codecs and formats */
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av_register_all();
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if (argc != 2) {
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printf("usage: %s input_file\n"
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"\n", argv[0]);
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return 1;
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}
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filename = argv[1];
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ret = avformat_open_input(&ic, filename, NULL, &format_opts);
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av_dict_free(&format_opts);
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if (ret < 0) {
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fprintf(stderr, "cannot open %s\n", filename);
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return 1;
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}
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ret = avformat_find_stream_info(ic, NULL);
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if (ret < 0) {
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fprintf(stderr, "%s: could not find codec parameters\n", filename);
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return 1;
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}
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for(i=0; ; i++){
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AVPacket pkt = { 0 };
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AVStream *av_uninit(st);
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char ts_buf[60];
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if(ret>=0){
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ret= av_read_frame(ic, &pkt);
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if(ret>=0){
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char dts_buf[60];
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st= ic->streams[pkt.stream_index];
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ts_str(dts_buf, pkt.dts, st->time_base);
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ts_str(ts_buf, pkt.pts, st->time_base);
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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);
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av_packet_unref(&pkt);
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} else
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printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace
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printf("\n");
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}
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if(i>25) break;
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stream_id= (i>>1)%(ic->nb_streams+1) - 1;
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timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;
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if(stream_id>=0){
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st= ic->streams[stream_id];
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timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
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}
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//FIXME fully test the new seek API
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if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);
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else ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);
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ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
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printf("ret:%-10s st:%2d flags:%d ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);
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}
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avformat_close_input(&ic);
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return 0;
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}
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