38 case AVERROR(EIO):
return "-EIO";
39 case AVERROR(ENOMEM):
return "-ENOMEM";
40 case AVERROR(EINVAL):
return "-EINVAL";
57 int main(
int argc,
char **argv)
61 int i, ret, stream_id;
70 for(
i=2;
i<argc;
i+=2){
71 if (!strcmp(argv[
i],
"-seekforw")){
72 seekfirst = atoi(argv[
i+1]);
73 }
else if(!strcmp(argv[
i],
"-seekback")){
74 seekfirst = atoi(argv[
i+1]);
76 }
else if(!strcmp(argv[
i],
"-frames")){
77 frame_count = atoi(argv[
i+1]);
78 }
else if(!strcmp(argv[
i],
"-duration")){
80 }
else if(!strcmp(argv[
i],
"-fastseek")) {
81 if (atoi(argv[
i+1])) {
84 }
else if(argv[
i][0] ==
'-' && argv[
i+1]) {
95 printf(
"usage: %s input_file\n"
105 fprintf(stderr,
"cannot open %s\n", filename);
111 fprintf(stderr,
"%s: could not find codec parameters\n", filename);
125 for(j=0; j<frame_count; j++) {
135 printf(
"ret:%s",
ret_str(ret));
151 ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);
152 printf(
"ret:%-10s st:%2d flags:%d ts:%s\n",
ret_str(ret), stream_id,
i&1, ts_buf);
AVDictionary * format_opts
common internal and external API header
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Seek to timestamp ts.
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
#define AVERROR_EOF
End of file.
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
#define AV_NOPTS_VALUE
Undefined timestamp value.
#define AV_TIME_BASE
Internal time base represented as integer.
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
static const char * ret_str(int v)
int main(int argc, char **argv)
static void ts_str(char buffer[60], int64_t ts, AVRational base)
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
int flags
Flags modifying the (de)muxer behaviour.
AVStream ** streams
A list of all streams in the file.
This structure stores compressed data.
int flags
A combination of AV_PKT_FLAG values.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
int64_t pos
byte position in stream, -1 if unknown
Rational number (pair of numerator and denominator).