Cap

Decoder can use draw_horiz_band callback.

Codec uses get_buffer() for allocating buffers and supports custom allocators. If not set, it might not use get_buffer() at all or use operations that assume the buffer was allocated by avcodec_default_get_buffer.

Undocumented

Encoder or decoder requires flushing with NULL input at the end in order to give the complete and correct output.

Decoders: The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, avpkt->size=0 at the end to get the delayed data until the decoder no longer returns frames.

Encoders: The encoder needs to be fed with NULL data at the end of encoding until the encoder no longer returns data.

Codec can be fed a final frame with a smaller size. This can be used to prevent truncation of the last audio samples.

Codec can output multiple frames per AVPacket. Normally demuxers return one frame at a time, demuxers which do not do are connected to a parser to split what they return into proper frames. This flag is reserved to the very rare category of codecs which have a bitstream that cannot be split into frames without timeconsuming operations like full decoding. Demuxers carrying such bitstreams thus may return multiple frames in a packet. This has many disadvantages like prohibiting stream copy in many cases thus it should only be considered as a last resort.

Codec is experimental and is thus avoided in favor of non experimental encoders.

Codec should fill in channel configuration and samplerate instead of container.

Codec supports frame-level multithreading.

Codec supports slice-based (or partition-based) multithreading.

Codec supports changed parameters at any point.

Codec supports avctx->thread_count == 0 (auto).

Audio encoder supports receiving a different number of samples in each call.

Decoder is not a preferred choice for probing. This indicates that the decoder is not a good choice for probing. It could for example be an expensive to spin up hardware decoder, or it could simply not provide a lot of useful information about the stream. A decoder marked with this flag should only be used as last resort choice for probing.

Codec is intra only.

Codec is lossless.

Codec is backed by a hardware implementation. Typically used to identify a non-hwaccel hardware decoder. For information about hwaccels, use hwConfig(at:) instead.

Codec is potentially backed by a hardware implementation, but not necessarily. This is used instead of Cap.hardware, if the implementation provides some sort of internal fallback.

This codec takes the reordered_opaque field from input AVFrames and returns it in the corresponding field in AVCodecContext after encoding.