38 printf(
"%s: pts:%s pts_time:%s dts:%s dts_time:%s duration:%s duration_time:%s stream_index:%d\n",
46 int main(
int argc,
char **argv)
51 const char *in_filename, *out_filename;
54 int *stream_mapping =
NULL;
55 int stream_mapping_size = 0;
58 printf(
"usage: %s input output\n" 59 "API example program to remux a media file with libavformat and libavcodec.\n" 60 "The output format is guessed according to the file extension.\n" 65 in_filename = argv[1];
66 out_filename = argv[2];
69 fprintf(stderr,
"Could not open input file '%s'", in_filename);
74 fprintf(stderr,
"Failed to retrieve input stream information");
82 fprintf(stderr,
"Could not create output context\n");
88 stream_mapping =
av_mallocz_array(stream_mapping_size,
sizeof(*stream_mapping));
89 if (!stream_mapping) {
94 ofmt = ofmt_ctx->oformat;
104 stream_mapping[
i] = -1;
108 stream_mapping[
i] = stream_index++;
112 fprintf(stderr,
"Failed allocating output stream\n");
119 fprintf(stderr,
"Failed to copy codec parameters\n");
129 fprintf(stderr,
"Could not open output file '%s'", out_filename);
136 fprintf(stderr,
"Error occurred when opening output file\n");
167 fprintf(stderr,
"Error muxing packet\n");
186 fprintf(stderr,
"Error occurred: %s\n",
av_err2str(ret));
int avio_open(AVIOContext **s, const char *url, int flags)
Create and initialize a AVIOContext for accessing the resource indicated by url.
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
int64_t pos
byte position in stream, -1 if unknown
static AVFormatContext * fmt_ctx
#define AVIO_FLAG_WRITE
write-only
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
This struct describes the properties of an encoded stream.
int main(int argc, char **argv)
timestamp utils, mostly useful for debugging/logging purposes
static av_cold int end(AVCodecContext *avctx)
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
AVStream ** streams
A list of all streams in the file.
#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.
void av_dump_format(AVFormatContext *ic, int index, const char *url, int is_output)
Print detailed information about the input or output format, such as duration, bitrate, streams, container, programs, metadata, side data, codec and time base.
#define i(width, name, range_min, range_max)
static AVFormatContext * ifmt_ctx
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
enum AVMediaType codec_type
General type of the encoded data.
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
av_warn_unused_result int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Round to nearest and halfway cases away from zero.
Flag telling rescaling functions to pass INT64_MIN/MAX through unchanged, avoiding special cases for ...
static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt, const char *tag)
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Rational number (pair of numerator and denominator).
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
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.
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd)
Rescale a 64-bit integer by 2 rational numbers with specified rounding.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
This structure stores compressed data.
int avio_closep(AVIOContext **s)
Close the resource accessed by the AVIOContext *s, free it and set the pointer pointing to it to NULL...
static AVFormatContext * ofmt_ctx
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().