func (this *CodecCtx) CopyExtra(ist *Stream) *CodecCtx {
codec := this.avCodecCtx
icodec := ist.CodecCtx().avCodecCtx
codec.bits_per_raw_sample = icodec.bits_per_raw_sample
codec.chroma_sample_location = icodec.chroma_sample_location
codec.codec_id = icodec.codec_id
codec.codec_type = icodec.codec_type
// codec.codec_tag = icodec.codec_tag
codec.rc_max_rate = icodec.rc_max_rate
codec.rc_buffer_size = icodec.rc_buffer_size
codec.field_order = icodec.field_order
codec.extradata = (*_Ctype_uint8_t)(C.av_mallocz((_Ctype_size_t)((C.uint64_t)(icodec.extradata_size) + C.FF_INPUT_BUFFER_PADDING_SIZE)))
C.memcpy(unsafe.Pointer(codec.extradata), unsafe.Pointer(icodec.extradata), (_Ctype_size_t)(icodec.extradata_size))
codec.extradata_size = icodec.extradata_size
codec.bits_per_coded_sample = icodec.bits_per_coded_sample
codec.has_b_frames = icodec.has_b_frames
return this
}
//Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU) and zero all the bytes of the block.
func AvMallocz(s uintptr) unsafe.Pointer {
return C.av_mallocz(C.size_t(s))
}