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AVPixelFormat
Pixel format.
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
enum AVMediaType codec_type
General type of the encoded data.
This struct describes the properties of an encoded stream.
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
#define AVERROR_EOF
End of file.
AVStream ** streams
A list of all streams in the file.
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
int buf_size
Size of buf except extra allocated bytes.
unsigned int avio_rl16(AVIOContext *s)
#define FF_ARRAY_ELEMS(a)
static int frm_read_probe(const AVProbeData *p)
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
const AVInputFormat ff_frm_demuxer
AVCodecParameters * codecpar
Codec parameters associated with this stream.
AVIOContext * pb
I/O context.
This structure contains the data a format has to probe a file.
@ AV_PIX_FMT_BGR0
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int avio_r8(AVIOContext *s)
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters.
@ AV_PIX_FMT_RGB0
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
static enum AVPixelFormat frm_pix_fmt_tags[]
#define i(width, name, range_min, range_max)
#define AV_PIX_FMT_RGB555
static int frm_read_header(AVFormatContext *avctx)
static int frm_read_packet(AVFormatContext *avctx, AVPacket *pkt)
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
void * priv_data
Format private data.