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Topics
Here is a list of all topics with brief descriptions:

libavdevice | Special devices muxing/demuxing library
libavfilter | Graph-based frame editing library
Buffer sink API | The buffersink and abuffersink filters are there to connect filter graphs to applications
Buffer sink accessors | Get the properties of the stream
Buffer source API |
libavformat | I/O and Muxing/Demuxing Library
Demuxing | Demuxers read a media file and split it into chunks of data (packets)
Muxing | Muxers take encoded data in the form of AVPackets and write it into files or other output bytestreams in the specified container format
I/O Read/Write |
Demuxers |
Native Demuxers |
External library wrappers |
I/O Protocols |
Internal |
Public Metadata API | The metadata API allows libavformat to export metadata tags to a client application when demuxing
Core functions | Functions for querying libavformat capabilities, allocating core structures, etc
Utility functions | Miscellaneous utility functions related to both muxing and demuxing (or neither)
RIFF FourCCs | Get the tables mapping RIFF FourCCs to libavcodec AVCodecIDs
libavcodec | Encoding/Decoding Library
Decoding |
Frame parsing |
Encoding |
Codecs |
Native Codecs |
External library wrappers |
Hardware Accelerators bridge |
Direct3D11 |
DXVA2 |
VDPAU Decoder and Renderer | VDPAU hardware acceleration has two modules
VideoToolbox Decoder | Hardware accelerated decoding using VideoToolbox on Apple Platforms
Internal |
send/receive encoding and decoding API overview | The avcodec_send_packet()/avcodec_receive_frame()/avcodec_send_frame()/ avcodec_receive_packet() functions provide an encode/decode API, which decouples input and output
Core functions/structures. | Basic definitions, functions for querying libavcodec capabilities, allocating core structures, etc
AVHWAccel |
Utility functions | Miscellaneous utility functions related to both encoding and decoding (or neither)
Pixel formats | Functions for working with pixel formats
Bitstream filters | Bitstream filters transform encoded media data without decoding it
AVPacketSideData | Types and functions for working with AVPacketSideData
AVPacket | Types and functions for working with AVPacket
libpostproc | Video postprocessing library
libswresample | Audio resampling, sample format conversion and mixing library
libswscale | Color conversion and scaling library
libavutil | Common code shared across all FFmpeg libraries
Crypto and Hashing |
AES |
AES-CTR |
Base64 |
Blowfish |
CAST5 |
CAMELLIA |
DES |
Hash Functions | Hash functions useful in multimedia
Adler-32 | Adler-32 hash function implementation
CRC | CRC (Cyclic Redundancy Check) hash function implementation
Generic Hashing API | An abstraction layer for all hash functions supported by libavutil
MD5 | MD5 hash function implementation
Murmur3 | MurmurHash3 hash function implementation
RIPEMD | RIPEMD hash function implementation
SHA | SHA-1 and SHA-256 (Secure Hash Algorithm) hash function implementations
SHA-512 | SHA-512 (Secure Hash Algorithm) hash function implementations
HMAC |
LZO |
RC4 |
TWOFISH |
XTEA |
TEA |
Mathematics | Mathematical utilities for working with timestamp and time base
Colorspace Utility |
AVRational | Rational number calculation
String Manipulation |
Memory Management | Utilities for manipulating memory
Function Attributes | Function attributes applicable to memory handling functions
Heap Management | Functions responsible for allocating, freeing, and copying memory
Dynamic Array | Utilities to make an array grow when needed
Miscellaneous Functions | Other functions related to memory allocation
Data Structures |
AVBPrint | A buffer to print data progressively
AVBuffer | AVBuffer is an API for reference-counted data buffers
AVBufferPool | AVBufferPool is an API for a lock-free thread-safe pool of AVBuffers
AVFifo | A generic FIFO API
AVFrame | AVFrame is an abstraction for reference-counted raw multimedia data
AV_FRAME_FLAGS | Flags describing additional frame properties
AVOptions | AVOptions provide a generic system to declare options on arbitrary structs ("objects")
AVOption (un)initialization and inspection. |
Setting and modifying option values |
Option setting functions | Those functions set the field of obj with the given name to value
Reading option values |
Option getting functions | Those functions get a value of the option with the given name from an object
Evaluating option strings | This group of functions can be used to evaluate option strings and get numbers out of them
AVDictionary | Simple key:value store
AVTree | Low-complexity tree container
Video related |
Display transformation matrix functions | The display transformation matrix specifies an affine transformation that should be applied to video frames for correct presentation
Spherical video mapping | A spherical video file contains surfaces that need to be mapped onto a sphere
Stereo3D types and functions | A stereoscopic video file consists in multiple views embedded in a single frame, usually describing two views of a scene
Audio related |
Audio FIFO Buffer |
Audio channels | Audio channel layout utility functions
Audio channel masks | A channel layout is a 64-bits integer with a bit set for every channel
Audio channel layouts |
Audio downmix metadata |
Immersive Audio Model and Formats | Immersive Audio Model and Formats related functions and defines
Parameter Definition | Parameters as defined in section 3.6.1 and 3.8 of IAMF
Audio Element | Audio Elements as defined in section 3.6 of IAMF
Mix Presentation | Mix Presentations as defined in section 3.7 of IAMF
Audio sample formats | Audio sample format enumeration and related convenience functions
Samples manipulation | Functions that manipulate audio samples
Error Codes |
Logging Facility |
Logging Constants |
Other |
Preprocessor String Macros | String manipulation macros
Library Version Macros | Useful to check and match library version in order to maintain backward compatibility
Constants |
Encoding specific |
Timestamp specific | FFmpeg internal timebase and timestamp definitions
Image related | AVPicture types, pixel formats and basic image planes manipulation
Version and Build diagnostics | Macros and function useful to check at compiletime and at runtime which version of libavutil is in use
Deprecation Guards | FF_API_* defines may be placed below to indicate public API that will be dropped at a future version bump
Media Type | Media Type
Device context creation flags | AVHWFramesContext.hwctx is currently not used