main.c
#include "libavutil/log.h"
#include "libavformat/avformat.h"
#include "libavutil/avutil.h"
#include "libavcodec/avcodec.h"
int main(int argc, char *argv[]) {
av_log_set_level(AV_LOG_DEBUG);
if (argc < 2) {
av_log(NULL, AV_LOG_ERROR, "Usage: %s inputFile\n", argv[0]);
return -1;
}
const char *inputFile = argv[1];
AVFormatContext *fCtx = NULL;
avformat_open_input(&fCtx, inputFile, NULL, NULL);
avformat_find_stream_info(fCtx, NULL);
av_dump_format(fCtx, 0, inputFile, 0);
av_log(NULL, AV_LOG_INFO, "input file duration:%ld us,%f s\n", fCtx->duration,
fCtx->duration * av_q2d(AV_TIME_BASE_Q));
AVRational videoTimeBase;
AVRational audioTimeBase;
for (int i = 0; i < fCtx->nb_streams; i++) {
AVStream *inStream = fCtx->streams[i];
if (inStream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
videoTimeBase = inStream->time_base;
av_log(NULL, AV_LOG_INFO, "video time base:num=%d,den=%d\n", videoTimeBase.num, videoTimeBase.den);
} else if (inStream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
audioTimeBase = inStream->time_base;
av_log(NULL, AV_LOG_INFO, "audio time base:num=%d,den=%d\n", audioTimeBase.num, audioTimeBase.den);
}
}
AVPacket *packet = av_packet_alloc();
while (av_read_frame(fCtx, packet) == 0) {
AVStream *inStream = fCtx->streams[packet->stream_index];
av_log(NULL, AV_LOG_INFO, "stream index=%d,pts=%ld,ptsTime=%lf,dts=%ld,dtsTime=%lf\n", packet->stream_index,
packet->pts, packet->pts *
av_q2d(inStream->time_base), packet->dts, packet->dts *
av_q2d(inStream->time_base));
}
return 0;
}Makefile
TARGET=main
SRC=main.c
CC=gcc
CFLAGS=-I /usr/local/ffmpeg/include
LDFLAGS=-L /usr/local/ffmpeg/lib
LDFLAGS+= -lavutil -lavformat -lavcodec
all:$(TARGET)
$(TARGET):$(SRC)
$(CC) $(SRC) $(CFLAGS) $(LDFLAGS) -o $(TARGET)
clean:
rm -rf $(TARGET)
