46 #define BUFFER_DURATION 0 48 #define MAX_HEADER_SIZE (7 + 4 + 12) 50 #define MAX_PACKET_SIZE (UINT16_MAX - MAX_HEADER_SIZE) 70 int data_size,
int index_pos)
75 const char *
desc, *mimetype;
91 packet_total_size = 0;
111 packet_avg_size = packet_total_size /
nb_packets;
134 if(tag) size += strlen(tag->
value);
149 desc =
"The Audio Stream";
150 mimetype =
"audio/x-pn-realaudio";
151 codec_data_size = 73;
153 desc =
"The Video Stream";
154 mimetype =
"video/x-pn-realvideo";
155 codec_data_size = 34;
159 size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size;
199 switch(sample_rate) {
219 if (coded_frame_size == 557)
278 if (
avio_seek(s, data_offset, SEEK_SET) >= 0) {
294 int length,
int key_frame)
321 av_log(s,
AV_LOG_ERROR,
"At most 2 streams are currently supported for muxing in RM\n");
377 for (i = 0; i <
size; i += 2) {
400 av_log(s,
AV_LOG_ERROR,
"Muxing packets larger than 64 kB (%d) is not supported\n", size);
440 int data_size, index_pos,
i;
446 data_size = index_pos - rm->
data_pos;
471 .mime_type =
"application/vnd.rn-realmedia",
472 .extensions =
"rm,ra",
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size, int flags)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
This struct describes the properties of an encoded stream.
void avio_wl32(AVIOContext *s, unsigned int val)
int id
Format-specific stream ID.
AVStream ** streams
A list of all streams in the file.
static void put_str(AVIOContext *s, const char *tag)
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
static void put_str8(AVIOContext *s, const char *tag)
StreamInfo * audio_stream
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVDictionary * metadata
Metadata that applies to the whole file.
static AVStream * audio_stream
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
enum AVMediaType codec_type
General type of the encoded data.
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
int flags
A combination of AV_PKT_FLAG values.
static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream, int length, int key_frame)
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
static int write_trailer(AVFormatContext *s1)
static int rm_write_header(AVFormatContext *s)
static int rm_write_packet(AVFormatContext *s, AVPacket *pkt)
#define FF_ARRAY_ELEMS(a)
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
const AVCodecTag ff_rm_codec_tags[]
AVIOContext * pb
I/O context.
void avio_w8(AVIOContext *s, int b)
Rational number (pair of numerator and denominator).
static int rm_write_trailer(AVFormatContext *s)
void avio_wb16(AVIOContext *s, unsigned int val)
#define flags(name, subs,...)
const char *const ff_rm_metadata[4]
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
int sample_rate
Audio only.
AVOutputFormat ff_rm_muxer
static int rv10_write_header(AVFormatContext *ctx, int data_size, int index_pos)
void * priv_data
Format private data.
static void write_header(FFV1Context *f)
void avio_wb32(AVIOContext *s, unsigned int val)
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...
static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int flags)
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
This structure stores compressed data.
StreamInfo * video_stream