57 int fps, chunk_header;
108 avio_seek(pb, chunk_header - 3, SEEK_SET);
118 int ret, audio_offset, video_offset, chunk_size, audio_size = 0;
126 while(state !=
MKTAG(
'S',
'A',
'V',
'I')){
129 state = 256*state +
avio_r8(pb);
137 audio_size = video_offset - audio_offset;
139 if (audio_size < 0 || bfi->video_size < 0) {
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int64_t bit_rate
the average bitrate
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
8 bit with AV_PIX_FMT_RGB32 palette
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
#define AVERROR_EOF
End of file.
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
unsigned int avio_rl32(AVIOContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
uint64_t channel_layout
Audio channel layout.
int avio_r8(AVIOContext *s)
AVCodecContext * codec
Codec context associated with this stream.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
audio channel layout utility functions
int width
picture width / height.
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
enum AVMediaType codec_type
int sample_rate
samples per second
AVIOContext * pb
I/O context.
This structure contains the data a format has to probe a file.
int64_t duration
Decoding: duration of the stream, in stream time base.
int64_t nb_frames
number of frames in this stream if known or 0
int channels
number of audio channels
void * priv_data
Format private data.
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
#define AV_CH_LAYOUT_MONO
#define MKTAG(a, b, c, d)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...