Function ffmpeg_sys_next::avcodec_flush_buffers

pub unsafe extern "C" fn avcodec_flush_buffers(
    avctx: *mut AVCodecContext
)

Reset the internal codec state / flush internal buffers. Should be called e.g. when seeking or when switching to a different stream.

@note for decoders, when refcounted frames are not used (i.e. avctx->refcounted_frames is 0), this invalidates the frames previously returned from the decoder. When refcounted frames are used, the decoder just releases any references it might keep internally, but the caller’s reference remains valid.

@note for encoders, this function will only do something if the encoder declares support for AV_CODEC_CAP_ENCODER_FLUSH. When called, the encoder will drain any remaining packets, and can then be re-used for a different stream (as opposed to sending a null frame which will leave the encoder in a permanent EOF state after draining). This can be desirable if the cost of tearing down and replacing the encoder instance is high.