Struct ffmpeg_sys_next::AVCodecParameters
source · #[repr(C)]pub struct AVCodecParameters {Show 29 fields
pub codec_type: AVMediaType,
pub codec_id: AVCodecID,
pub codec_tag: u32,
pub extradata: *mut u8,
pub extradata_size: c_int,
pub format: c_int,
pub bit_rate: i64,
pub bits_per_coded_sample: c_int,
pub bits_per_raw_sample: c_int,
pub profile: c_int,
pub level: c_int,
pub width: c_int,
pub height: c_int,
pub sample_aspect_ratio: AVRational,
pub field_order: AVFieldOrder,
pub color_range: AVColorRange,
pub color_primaries: AVColorPrimaries,
pub color_trc: AVColorTransferCharacteristic,
pub color_space: AVColorSpace,
pub chroma_location: AVChromaLocation,
pub video_delay: c_int,
pub channel_layout: u64,
pub channels: c_int,
pub sample_rate: c_int,
pub block_align: c_int,
pub frame_size: c_int,
pub initial_padding: c_int,
pub trailing_padding: c_int,
pub seek_preroll: c_int,
}
Expand description
This struct describes the properties of an encoded stream.
sizeof(AVCodecParameters) is not a part of the public ABI, this struct must be allocated with avcodec_parameters_alloc() and freed with avcodec_parameters_free().
Fields§
§codec_type: AVMediaType
General type of the encoded data.
codec_id: AVCodecID
Specific type of the encoded data (the codec used).
codec_tag: u32
Additional information about the codec (corresponds to the AVI FOURCC).
extradata: *mut u8
Extra binary data needed for initializing the decoder, codec-dependent.
Must be allocated with av_malloc() and will be freed by avcodec_parameters_free(). The allocated size of extradata must be at least extradata_size + AV_INPUT_BUFFER_PADDING_SIZE, with the padding bytes zeroed.
extradata_size: c_int
Size of the extradata content in bytes.
format: c_int
- video: the pixel format, the value corresponds to enum AVPixelFormat.
- audio: the sample format, the value corresponds to enum AVSampleFormat.
bit_rate: i64
The average bitrate of the encoded data (in bits per second).
bits_per_coded_sample: c_int
The number of bits per sample in the codedwords.
This is basically the bitrate per sample. It is mandatory for a bunch of formats to actually decode them. It’s the number of bits for one sample in the actual coded bitstream.
This could be for example 4 for ADPCM For PCM formats this matches bits_per_raw_sample Can be 0
bits_per_raw_sample: c_int
This is the number of valid bits in each output sample. If the sample format has more bits, the least significant bits are additional padding bits, which are always 0. Use right shifts to reduce the sample to its actual size. For example, audio formats with 24 bit samples will have bits_per_raw_sample set to 24, and format set to AV_SAMPLE_FMT_S32. To get the original sample use “(int32_t)sample >> 8”.“
For ADPCM this might be 12 or 16 or similar Can be 0
profile: c_int
Codec-specific bitstream restrictions that the stream conforms to.
level: c_int
§width: c_int
Video only. The dimensions of the video frame in pixels.
height: c_int
§sample_aspect_ratio: AVRational
Video only. The aspect ratio (width / height) which a single pixel should have when displayed.
When the aspect ratio is unknown / undefined, the numerator should be set to 0 (the denominator may have any value).
field_order: AVFieldOrder
Video only. The order of the fields in interlaced video.
color_range: AVColorRange
Video only. Additional colorspace characteristics.
color_primaries: AVColorPrimaries
§color_trc: AVColorTransferCharacteristic
§color_space: AVColorSpace
§chroma_location: AVChromaLocation
§video_delay: c_int
Video only. Number of delayed frames.
channel_layout: u64
Audio only. The channel layout bitmask. May be 0 if the channel layout is unknown or unspecified, otherwise the number of bits set must be equal to the channels field.
channels: c_int
Audio only. The number of audio channels.
sample_rate: c_int
Audio only. The number of audio samples per second.
block_align: c_int
Audio only. The number of bytes per coded audio frame, required by some formats.
Corresponds to nBlockAlign in WAVEFORMATEX.
frame_size: c_int
Audio only. Audio frame size, if known. Required by some formats to be static.
initial_padding: c_int
Audio only. The amount of padding (in samples) inserted by the encoder at the beginning of the audio. I.e. this number of leading decoded samples must be discarded by the caller to get the original audio without leading padding.
trailing_padding: c_int
Audio only. The amount of padding (in samples) appended by the encoder to the end of the audio. I.e. this number of decoded samples must be discarded by the caller from the end of the stream to get the original audio without any trailing padding.
seek_preroll: c_int
Audio only. Number of samples to skip after a discontinuity.
Trait Implementations§
source§impl Clone for AVCodecParameters
impl Clone for AVCodecParameters
source§fn clone(&self) -> AVCodecParameters
fn clone(&self) -> AVCodecParameters
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for AVCodecParameters
impl Debug for AVCodecParameters
source§impl PartialEq for AVCodecParameters
impl PartialEq for AVCodecParameters
source§fn eq(&self, other: &AVCodecParameters) -> bool
fn eq(&self, other: &AVCodecParameters) -> bool
self
and other
values to be equal, and is used
by ==
.