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32 int64_t sec,
min, hour;
33 sec = millisec / 1000;
34 millisec -= 1000 * sec;
43 avio_printf(pb,
"%02"PRId64
":%02"PRId64
".%03"PRId64
"",
min, sec, millisec);
67 int id_size, settings_size;
75 if (
id && id_size > 0)
85 if (settings && settings_size > 0)
100 .mime_type =
"text/vtt",
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 struct describes the properties of an encoded stream.
AVStream ** streams
A list of all streams in the file.
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
@ AV_PKT_DATA_WEBVTT_SETTINGS
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
AVIOContext * pb
I/O context.
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
Writes a formatted string to the context.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
@ AV_PKT_DATA_WEBVTT_IDENTIFIER
The optional first identifier line of a WebVTT cue.