57 int ret, fps, chunk_header;
114 avio_seek(pb, chunk_header - 3, SEEK_SET);
124 int ret, audio_offset, video_offset, chunk_size, audio_size = 0;
143 if (audio_offset < 0 || video_offset < audio_offset || chunk_size < video_offset) {
147 audio_size = video_offset - audio_offset;
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
unsigned int avio_rl32(AVIOContext *s)
int avio_r8(AVIOContext *s)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
audio channel layout utility functions
#define MKTAG(a, b, c, d)
static int read_header(FFV1Context *f)
#define AV_CH_LAYOUT_MONO
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AVERROR_EOF
End of file.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
uint64_t channel_layout
Audio only.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
enum AVMediaType codec_type
General type of the encoded data.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int sample_rate
Audio only.
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
This structure contains the data a format has to probe a file.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int64_t nb_frames
number of frames in this stream if known or 0
int64_t duration
Decoding: duration of the stream, in stream time base.